Migration, Upgrade, and Downgrade Instructions | 32
Upgrade and Downgrade Support Policy for Junos OS Releases | 32
Junos OS Release Notes for EX Series Switches | 34
What’s New | 34
What’s New in Release 19.2R3 | 35
What’s New in Release 19.2R2 | 35
What’s New in Release 19.2R1-S1 | 36
2
What’s New in Release 19.2R1 | 36
What’s Changed | 41
What’s Changed in Release 19.2R3 | 41
What’s Changed in Release 19.2R2 | 41
What’s Changed in Release 19.2R1 | 43
Known Limitations | 44
EVPN | 45
Platform and Infrastructure | 45
Open Issues | 45
Authentication and Access Control | 46
Infrastructure | 46
Interfaces and Chassis | 47
Junos Fusion for Enterprise | 47
Layer 2 Features | 47
Network Management and Monitoring | 47
Platform and Infrastructure | 47
Routing Protocols | 48
Resolved Issues | 49
Resolved Issues: 19.2R3 | 49
Resolved Issues: 19.2R2 | 51
Resolved Issues: 19.2R1 | 59
Documentation Updates | 63
Installation and Upgrade | 63
Migration, Upgrade, and Downgrade Instructions | 63
Upgrade and Downgrade Support Policy for Junos OS Releases | 64
Junos OS Release Notes for Junos Fusion Enterprise | 65
What’s New | 65
What's New in Release 19.2R3 | 66
What's New in Release 19.2R2 | 66
What's New in Release 19.2R1 | 66
What’s Changed | 67
What’s Changed in 19.2R3 | 67
What’s Changed in 19.2R2 | 67
What’s Changed in 19.2R1 | 67
3
Known Limitations | 68
Open Issues | 68
Junos fusion for enterprise | 68
Resolved Issues | 69
Resolved Issues: 19.2R3 | 70
Resolved Issues: 19.2R2 | 70
Resolved Issues: 19.2R1 | 70
Documentation Updates | 71
Migration, Upgrade, and Downgrade Instructions | 71
Basic Procedure for Upgrading Junos OS on an Aggregation Device | 71
Upgrading an Aggregation Device with Redundant Routing Engines | 73
Preparing the Switch for Satellite Device Conversion | 74
Converting a Satellite Device to a Standalone Switch | 75
Upgrade and Downgrade Support Policy for Junos OS Releases | 75
Downgrading from Junos OS | 76
Junos OS Release Notes for Junos Fusion Provider Edge | 77
What's New | 77
What’s New in Release 19.2R3 | 78
What’s New in Release 19.2R2 | 78
What’s New in Release 19.2R1 | 78
What’s Changed | 78
Known Limitations | 79
Open Issues | 79
Junos Fusion Provider Edge | 80
Resolved Issues | 80
Resolved Issues: 19.2R3 | 81
Resolved Issues: 19.2R2 | 81
Resolved Issues: 19.2R1 | 81
Documentation Updates | 82
Migration, Upgrade, and Downgrade Instructions | 82
Basic Procedure for Upgrading an Aggregation Device | 83
Upgrading an Aggregation Device with Redundant Routing Engines | 85
Preparing the Switch for Satellite Device Conversion | 86
4
Converting a Satellite Device to a Standalone Device | 87
Upgrading an Aggregation Device | 90
Upgrade and Downgrade Support Policy for Junos OS Releases | 90
Downgrading from Junos OS Release 19.2 | 90
Junos OS Release Notes for MX Series 5G Universal Routing Platform | 91
What’s New | 92
What’s New in 19.2R3 | 92
What’s New in 19.2R2 | 93
What’s New in 19.2R1-S4 | 93
What’s New in 19.2R1-S1 | 94
What’s New in 19.2R1 | 95
What's Changed | 113
What’s Changed in Release 19.2R3-S1 | 114
What’s Changed in Release 19.2R3 | 114
What’s Changed in Release 19.2R2 | 115
What’s Changed in Release 19.2R1 | 120
Known Limitations | 123
General Routing | 124
Interfaces and Chassis | 126
Platform and Infrastructure | 127
Routing Protocols | 127
Open Issues | 127
EVPN | 128
Forwarding and Sampling | 128
General Routing | 129
Infrastructure | 134
Interfaces and Chassis | 134
Junos Fusion for Provider Edge | 135
Layer 2 Features | 135
Layer 2 Ethernet Services | 135
MPLS | 135
Network Management and Monitoring | 136
Platform and Infrastructure | 136
Routing Protocols | 137
5
User Interface and Configuration | 138
VPNs | 138
Resolved Issues | 139
Resolved Issues: 19.2R3 | 139
Resolved Issues: 19.2R2 | 146
Resolved Issues: 19.2R1 | 175
Documentation Updates | 191
Installation and Upgrade Guide | 191
Subscriber Management Provisioning Guide | 191
Migration, Upgrade, and Downgrade Instructions | 192
Basic Procedure for Upgrading to Release 19.2 | 193
Procedure to Upgrade to FreeBSD 11.x based Junos OS | 193
Procedure to Upgrade to FreeBSD 6.x based Junos OS | 195
Upgrade and Downgrade Support Policy for Junos OS Releases | 197
Upgrading a Router with Redundant Routing Engines | 198
Downgrading from Release 19.2 | 198
Junos OS Release Notes for NFX Series | 199
What’s New | 199
What’s New in Release 19.2R3 | 200
What’s New in Release 19.2R2 | 200
What’s New in Release 19.2R1 | 200
What’s Changed | 201
What’s Changed in Release 19.2R3 | 202
What’s Changed in Release 19.2R2 | 202
What’s Changed in Release 19.2R1 | 202
Known Limitations | 202
Interfaces | 203
Platform and Infrastructure | 203
Virtual Network Functions (VNFs) | 204
Open Issues | 204
Interfaces | 205
Platform and Infrastructure | 205
Routing Protocols | 205
Virtual Network Functions (VNFs) | 206
6
Resolved Issues | 206
Resolved Issues: 19.2R3 | 207
Resolved Issues: 19.2R2 | 207
Resolved Issues: 19.2R1 | 209
Documentation Updates | 210
Migration, Upgrade, and Downgrade Instructions | 210
Upgrade and Downgrade Support Policy for Junos OS Releases | 211
Basic Procedure for Upgrading to Release 19.2 | 211
Junos OS Release Notes for PTX Series Packet Transport Routers | 212
What's New | 213
What’s New in 19.2R3 | 213
What’s New in 19.2R2 | 214
New and Changed Features: 19.2R1-S4 | 214
New and Changed Features: 19.2R1-S1 | 215
New and Changed Features: 19.2R1 | 215
What’s Changed | 221
What’s Changed in Release 19.2R3 | 222
What’s Changed in Release 19.2R2 | 222
What’s Changed in Release 19.2R1-S5 | 224
What’s Changed in Release 19.2R1 | 224
Known Limitations | 227
General Routing | 227
Interfaces and Chassis | 228
Open Issues | 228
General Routing | 229
Interfaces and Chassis | 230
Layer 2 Ethernet Services | 230
Routing Protocols | 230
Resolved Issues | 230
Resolved Issues: 19.2R3 | 231
Resolved Issues: 19.2R2 | 231
Resolved Issues: 19.2R1 | 235
Documentation Updates | 238
Installation and Upgrade Guide | 238
7
Migration, Upgrade, and Downgrade Instructions | 238
Basic Procedure for Upgrading to Release 19.2 | 239
Upgrade and Downgrade Support Policy for Junos OS Releases | 241
Upgrading a Router with Redundant Routing Engines | 242
Junos OS Release Notes for the QFX Series | 243
What's New | 243
What’s New in Release 19.2R3 | 244
What’s New in Release 19.2R2 | 244
What's New in Release 19.2R1-S1 | 244
What's New in Release 19.2R1 | 245
What's Changed | 253
What’s Changed in Release 19.2R3 | 254
What’s Changed in Release 19.2R2 | 254
What’s Changed in Release 19.2R1 | 257
Known Limitations | 259
EVPN | 259
Layer 2 Features | 259
Platform and Infrastructure | 259
Routing Protocols | 260
Open Issues | 261
EVPN | 261
Infrastructure | 262
Interfaces and Chassis | 262
Layer 2 Features | 262
Platform and Infrastructure | 262
Routing Protocols | 264
Virtual Chassis | 264
Resolved Issues | 265
Resolved Issues: 19.2R3 | 265
Resolved Issues: 19.2R2 | 267
Resolved Issues: 19.2R1 | 281
Documentation Updates | 287
Installation and Upgrade guide | 287
8
Migration, Upgrade, and Downgrade Instructions | 288
Upgrading Software on QFX Series Switches | 288
Installing the Software on QFX10002-60C Switches | 291
Installing the Software on QFX10002 Switches | 291
Upgrading Software from Junos OS Release 15.1X53-D3X to Junos OS Release
15.1X53-D60, 15.1X53-D61.7, 15.1X53-D62, and 15.1X53-D63 on QFX10008 and
QFX10016 Switches | 292
Installing the Software on QFX10008 and QFX10016 Switches | 294
Performing a Unified ISSU | 298
Preparing the Switch for Software Installation | 299
Upgrading the Software Using Unified ISSU | 299
Upgrade and Downgrade Support Policy for Junos OS Releases | 301
Junos OS Release Notes for SRX Series | 302
What’s New | 303
New and Changed Features: 19.2R3 | 303
New and Changed Features: 19.2R2 | 303
New and Changed Features: 19.2R1-S1 | 304
New and Changed Features: 19.2R1 | 304
What's Changed | 313
Release 19.2R3 Changes in Behavior and Syntax | 314
Release 19.2R2 Changes in Behavior and Syntax | 314
Release 19.2R1 Changes in Behavior and Syntax | 316
Known Limitations | 317
J-Web | 318
VPNs | 318
Open Issues | 319
Chassis Clustering | 319
Flow-Based and Packet-Based Processing | 319
Intrusion Detection and Prevention (IDP) | 320
J-Web | 320
Platform and Infrastructure | 320
Routing Policy and Firewall Filters | 320
VPNs | 320
Resolved Issues | 321
Resolved Issues: 19.2R3 | 321
9
Resolved Issues: 19.2R2 | 323
Resolved Issues: 19.2R1 | 333
Documentation Updates | 340
Migration, Upgrade, and Downgrade Instructions | 341
Upgrade and Downgrade Support Policy for Junos OS Releases and Extended End-Of-Life
Releases | 341
Upgrading Using ISSU | 342
Licensing | 342
Compliance Advisor | 342
Finding More Information | 343
Documentation Feedback | 343
Requesting Technical Support | 344
Self-Help Online Tools and Resources | 344
Opening a Case with JTAC | 345
Revision History | 345
Introduction
Junos OS runs on the following Juniper Networks®hardware: ACX Series, EX Series, M Series, MX Series,
NFX Series, PTX Series, QFabric systems, QFX Series, SRX Series, T Series, and Junos Fusion.
These release notes accompany Junos OS Release 19.2R3 for the ACX Series, EX Series, MX Series, NFX
Series, PTX Series, QFX Series, SRX Series, and Junos Fusion. They describe new and changed features,
limitations, and known and resolved problems in the hardware and software.
Junos OS Release Notes for ACX Series
IN THIS SECTION
10
What's New | 11
What's Changed | 16
Known Limitations | 19
Open Issues | 22
Resolved Issues | 25
Documentation Updates | 31
Migration, Upgrade, and Downgrade Instructions | 32
These release notes accompany Junos OS Release 19.2R3 for the ACX Series. They describe new and
changed features, limitations, and known and resolved problems in the hardware and software.
You can also find these release notes on the Juniper Networks Junos OS Documentation webpage, located
at https://www.juniper.net/documentation/product/en_US/junos-os.
What's New
IN THIS SECTION
What's New in Release 19.2R3 | 11
What's New in Release 19.2R2 | 11
What's New in Release 19.2R1-S1 | 12
What's New in Release 19.2R1 | 12
Learn about new features introduced in the Junos OS main and maintenance releases for ACX Series
routers.
11
What's New in Release 19.2R3
There are no new features or enhancements to existing features for ACX Series routers in Junos OS Release
19.2R3.
What's New in Release 19.2R2
There are no new features on ACX Series in Release 19.2R2.
What's New in Release 19.2R1-S1
Routing Protocols
Decouple RSVP for IGP-TE (MX Series, PTX Series, ACX Series, QFX Series, SRX Series, and EX
•
Series)—Starting in Junos OS Release 19.2R1-S1, device can advertise selective traffic-engineering
attributes such as admin-color and maximum-bandwidth, without enabling RSVP, for segment routing
and interior gateway protocol (IGP) deployments.
What's New in Release 19.2R1
Class of Service (CoS)
Support for class of service (CoS)(ACX6360 routers)—Starting in Junos OS Release 19.2R1, ACX6360
•
routers support class of service (CoS) functionality.
CoS is the assignment of traffic flows to different service levels. Service providers can use router-based
CoS features to define service levels that provide different delay, jitter (delay variation), and packet loss
characteristics to particular applications served by specific traffic flows.
12
[See CoS on ACX Series Universal Metro Routers Features Overview.]
EVPN
EVPN support of VLAN ID ranges and lists in service provider style interface configurations (EX9200
•
switches, ACX5448 and MX Series routers, and vMX virtual routers)—Starting in Junos OS Release
19.2R1, EX9200 switches, ACX5448 and MX Series routers, and vMX virtual routers support the use
of VLAN ID ranges and lists in a service provider style interface configuration, which must be referenced
in an EVPN routing instance. This configuration is supported with the following EVPN environments,
services, and features:
Environments:
•
EVPN with VXLAN encapsulation
•
EVPN with MPLS encapsulation
•
VLAN bundle service:
•
E-LAN
•
E-Tree
•
E-Line
•
Feature:
•
EVPN multihoming:
•
All-active
•
Single-active
•
Singlehoming
•
[See VLAN ID Ranges and Lists in an EVPN Environment.]
Interfaces and Chassis
Support for 100-Mbps and 1-Gbps speeds on Tri-Rate Copper SFP (ACX5448 routers)—Starting in
•
Junos OS Release 19.2R1, ACX5448 routers support 100-Mbps and 1-Gbps speeds on Tri-Rate Copper
SFP optics (part number 740-013111).
NOTE: 100-Mbps speed is supported only on ports xe-0/0/24 through xe-0/0/47.
10-Mbps speed is not supported on Tri-Rate Copper SFP due to hardware limitations.
To set the speed for the optics, issue the set interfaces interface-name speed auto command. [See
•
Speed for more details.]
To enable autonegotiation, issue the set interfaces interface-name gigether-options auto-negotiation
•
command. [See auto-negotiation.]
13
Junos Telemetry Interface
Support for LSP statistics on JTI (ACX6360)—Starting with Junos OS Release 19.2R1, you can provision
•
the LSP statistics sensor using the resource path /junos/services/label-switched-path/usage/ to monitor
per-MPLS LSP statistics on the ACX6360 router and export telemetry data through Junos telemetry
interface (JTI) to external collectors. You can stream data at configurable intervals through gRPC without
involving polling.
JTI support is only for RSVP LSPs.
Statistics that are streamed are similar to the output displayed by the operational mode command showmpls lsp bypass statistics.
To provision a sensor to export data through gRPC, use the telemetrySubscribe RPC to specify telemetry
parameters. Streaming telemetry data through gRPC also requires the OpenConfig for Junos OS module.
Starting in Junos OS Release 18.3R1, OpenConfig and Network Agent packages are bundled into the
Junos OS image by default. Both packages support JTI.
To enable statistics for export from the Junos OS, include the sensor-based-stats statement at the [editprotocols mpls] hierarchy level.
[See Guidelines for gRPC Sensors (Junos Telemetry Interface) and Understanding OpenConfig and gRPC
on Junos Telemetry Interface.]
•
Specify Routing Instance for JTI (ACX Series, MX Series, PTX Series, and QFX Series)—Starting in Junos
OS Release 19.2R1, you can specify the routing instance to use for remote procedure call (gRPC) services.
Include the routing-instance instance-name at the [edit system services extension-servicerequest-response grpc] hierarchy level. The routing instance name specified should match the name of
the existing routing instance, such as a name configured under the [routing-instances] hierarchy level
or mgmt_junos if system management-instance is configured (the dedicated management routing
instance).
Configuring the routing instance lets you choose the VRF for gRPC services. When the routing instance
is not configured, the default behavior is that all gRPC-related services are available through the
management fxp0/em0) interface.
Layer 3 Features
Support for Layer 3 unicast features (ACX 6360)—Starting in Junos OS Release 19.2R1, ACX routers
•
support the following Layer 3 forwarding features for unicast IPv4 and IPv6 traffic:
Basic IPv6 forwarding
•
Virtual router (VRF-lite) for both IPv4 and IPv6
•
Layer 3 subinterfaces support for both IPv4 and IPv6
•
VRF-lite, subinterfaces, and IPv6 forwarding support on link aggregation groups (LAGs)
Support for displaying valid user input in the CLI for command options and configuration statements
•
in custom YANG data models (ACX Series)—Starting in Junos OS Release 19.2R1, the CLI displays the
set of possible values for a given command option or configuration statement in a custom YANG data
model when you include the action-expand extension statement in the option or statement definition
and reference a script that handles the logic. The action-expand statement must include the script child
statement, which defines the Python action script that is invoked when a user requests context-sensitive
help in the CLI for the value of that option or statement.
[See Displaying Valid Command Option and Configuration Statement Values in the CLI for Custom YANG
Modules.]
Software Installation and Upgrade
Zero Touch Provisioning (ACX5448)—Starting in Junos OS Release 19.2R1, Zero Touch Provisioning
•
(ZTP) automates the provisioning of the device configuration and software image with minimal manual
intervention on management interface em0.
15
When you physically connect a router to the network and boot it with a factory configuration, the router
upgrades the Junos OS software image automatically and automatically installs a configuration file from
the network through the management interface.
[See Zero Touch Provisioning.]
System Management
Support for transferring accounting statistics files and router configuration archives using HTTP URL
•
(ACX Series)—Starting in Junos OS Release 19.2R1, you can transfer accounting statistics files and router
configuration archives to remote servers by using an HTTP URL. In addition to SCP and FTP, the following
HTTP URL will be supported under the archive-sites statement:
http://username@host:url-path password password
To transfer accounting statistics files, configure archive-sites under [edit accounting-options file
•
<filename>] hierarchy.
To transfer router configuration archival, configure archive-sites under edit system archival
•
configuration hierarchy.
To view the statistics of transfer attempted, succeeded, and failed, use the show accounting server
•
statistics archival-transfer command.
To clear the statistics of transfer attempted, succeeded, and failed, use the clear accounting server
•
statistics archival-transfer command.
[See archive-sites, Backing Up Configurations to an Archive Site, show accounting server statistics
archival-transfer, and clear accounting server statistics archival-transfer].
Precision Time Protocol (PTP) Transparent Clock with IPv6 Transport (PTX10001-20C and ACX6360-OR
•
devices)—Starting with Junos OS Release 19.2R1, PTP uses IPv6 transport to synchronize clocks
throughout a packet-switched network. With a transparent clock, the PTP packets are updated with
theresidence time as the packets pass through the switch. There is no master/slaved designation.
End-to-end transparent clocks are supported. With an end-to-end transparent clock, only the residence
time is included. The residence time can be sent in a one-step process, which means that the timestamps
are sent in one packet.
You can configure the transparent clock at the [edit protocols ptp] Junos OS CLI hierarchy.
[See Understanding Transparent Clocks in Precision Time Protocol.]
SEE ALSO
What's Changed | 16
Known Limitations | 19
16
Open Issues | 22
Resolved Issues | 25
Documentation Updates | 31
Migration, Upgrade, and Downgrade Instructions | 32
What's Changed
IN THIS SECTION
What’s Changed in 19.2R3-S1 | 17
What’s Changed in 19.2R3 | 17
What’s Changed in 19.2R2 | 17
What’s Changed in 19.2R1 | 18
Learn about what changed in the Junos OS main and maintenance releases for ACX Series routers.
What’s Changed in 19.2R3-S1
General Routing
Support for gigether-options statement (ACX5048, ACX5096)—Junos OS supports the gigether-options
•
statement at the edit interfaces interface-name hierarchy on the ACX5048 and ACX5096 routers.
Previously, support for the gigether-statement was deprecated.
[See gigether-options.]
What’s Changed in 19.2R3
Juniper Extension Toolkit (JET)
Set the trace log to only show error messages (ACX Series, EX Series, MX Series, PTX Series, QFX
•
Series, SRX Series)— You can set the verbosity of the trace log to only show error messages using the
error option at the edit system services extension-service traceoptions level hierarchy.
See traceoptions (Services).
17
What’s Changed in 19.2R2
Interfaces and Chassis
Support for creating Layer 2 logical interfaces independently (ACX Series, EX Series, MX Series, PTX
•
Series, and QFX Series)—In Junos OS Release 19.2R2 and later, ACX Series routers support creating
Layer 2 logical interfaces independent of the Layer 2 routing-instance type. That is, you can configure
and commit the Layer 2 logical interfaces separately and add the interfaces to the bridge domain or
Ethernet VPN (EVPN) routing instance separately. Note that the Layer 2 logical interfaces work fine only
when they are added to the bridge domain or EVPN routing instance.
In earlier Junos OS releases, when you use a Layer 2 logical interface configuration (units with
encapsulation vlan-bridge configuration), then you must add the logical interface as part of a bridge
domain or EVPN routing instance for the commit to succeed.
Support for disabling RS-FEC (ACX6360-OX)—By default, Junos OS software enables or disables forward
•
error correction based on plugged-in optics. Starting with Junos OS Release 19.2R2, on ACX6360-OX
routers functioning as transponders, you can now disable Ethernet FEC, also known as RS-FEC or FEC91.
Previously, RS-FEC was enabled by default and could not be disabled.
[See fec.]
Operation, Administration, and Maintenance (OAM)
Performance monitoring history data is lost when a change in number of supported history records is
•
detected (ACX Series and MX Series)—In Junos OS Release 19.2R2, when Ethernet connectivity fault
management starts, it detects the number of history records supported by the existing Performance
Monitoring history database and if there is any change from the number of history records supported
(that is, 12) in Release 19.2R2, then the existing performance monitoring history database is cleared and
all performance monitoring sessions are restarted with mi-index 1.
Routing Protocols
XML RPC equivalent included for the show bgp output-scheduler | display xml rpc CLI command (ACX
•
Series, EX Series, MX Series, PTX Series, QFX Series, and SRX Series)—Starting in Junos OS Release
19.2R2, we have included an XML RPC equivalent for the show bgp output-scheduler | display xml rpc
CLI command. In Junos OS releases before Release 19.2R2, the show bgp output-scheduler | displayxml rpc CLI command does not have an XML RPC equivalent.
[See show bgp output-scheduler.]
18
What’s Changed in 19.2R1
Interfaces and Chassis
Monitoring information available only in trace log (ACX Series)—In Junos OS Release 19.2R1 and later,
•
the Ethernet link fault management daemon (lfmd) in the peer router stops monitoring the locally occurred
errors until ISSU completes. You can view the monitoring-related details only through the trace log file.
Network Management and Monitoring
The show system schema command and <get-yang-schema> RPC require specifying an output directory
•
(ACX Series)—Starting in Junos OS Release 19.2R1, when you issue the show system schema operational
mode command in the CLI or execute the <get-yang-schema> RPC in a remote session to retrieve
schema files, you must specify the directory in which to generate the output files by including the
output-directory command option in the CLI or the <output-directory> element in the RPC. In earlier
releases, you can omit the output-directory argument when requesting a single module to display the
module in standard output.
Custom YANG RPC support for input parameters of type empty (ACX Series)—Starting in Junos OS
•
Release 19.2R1, custom YANG RPCs support input parameters of type empty when executing the RPC’s
command in the Junos OS CLI, and the value passed to the action script is the parameter name. In earlier
releases, input parameters of type empty are only supported when executing the RPC in a NETCONF
or Junos XML protocol session, and the value passed to the action script is the string 'none'.
[See Creating Action Scripts for YANG RPCs on Devices Running Junos OS.]
VLAN Infrastructure
Specifying a descending VLAN ID range ( ACX5448 routers)—In Junos OS releases prior to Junos OS
•
Release 19.2R1, the system accepts a descending range—for example, 102-100, with the vlan-id-range
configuration statement in the [edit interfaces interface-name unit logical-unit-number] hierarchy.
Starting with Junos OS Release 19.2R1, the system considers a descending range specified with
vlan-id-range to be invalid and raises an error if you try to commit this configuration.
SEE ALSO
What's New | 11
Known Limitations | 19
Open Issues | 22
Resolved Issues | 25
Documentation Updates | 31
19
Migration, Upgrade, and Downgrade Instructions | 32
Known Limitations
IN THIS SECTION
General Routing | 19
Learn about known limitations in this release for ACX Series routers.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks
online Junos Problem Report Search application.
General Routing
All PTP packets go to the best-effort queue instead of the network control queue. This is because of
•
the limitation on ACX5448 where DSCP values are not preserved. PR1361315
ACX6360 Junos telemetry interface or telemetry infrastructure does not support the interface-filtering
•
capability. Therefore, after you enable a particular sensor for telemetry, it is turned on for all the interfaces.
PR1371996
For an Ethernet (et) interface, only the PRE_FEC_SD defect is raised and no OTN alarm is raised.
•
PR1371997
The CLI static-cak command encryption does not work between two ACX-OX transponder nodes.
•
PR1389802
The ACX6360 TIC has only 8 CFP2-DCO ports, so chassis beacon show/requests to port numbers larger
•
than 7 do not work (as the ports don't exist) but also do not report an error. user@router> request
chassis beacon fpc 0 pic-slot 1 port 15 on FPC 0 PIC 1 PORT 15 ON user@router> show chassis beacon
fpc 0 pic-slot 1 port-range lower-limit 0 upper-limit 15 FPC 0 PIC 1 PORT 0 ON FPC 0 PIC 1 PORT 1
ON FPC 0 PIC 1 PORT 2 ON FPC 0 PIC 1 PORT 3 ON FPC 0 PIC 1 PORT 4 ON FPC 0 PIC 1 PORT 5
ON FPC 0 PIC 1 PORT 6 ON FPC 0 PIC 1 PORT 7 ON FPC 0 PIC 1 PORT 8 ON FPC 0 PIC 1 PORT 9
ON FPC 0 PIC 1 PORT 10 OFF FPC 0 PIC 1 PORT 11 OFF FPC 0 PIC 1 PORT 12 OFF FPC 0 PIC 1
PORT 13 OFF FPC 0 PIC 1 PORT 14 OFF FPC 0 PIC 1 PORT 15 ON. PR1399335
When a timing configuration and the corresponding interface configuration are flapped for multiple
•
times in iteration, PTP is stuck in "INITIALIZE" state where the ARP for the neighbor is not resolved. In
issue state, BCM hardware block gets into inconsistency state, where the lookup is failing. PR1410746
The input packet count given under the traffic statistics includes all packets that are coming in. The
•
statistics are not segregated as IPv4, IPv6, MPLS, and so on. This is the same behavior across all the ACX
Series platforms. PR1419143
20
Hardware-based fragmentation or reassembly is not supported. Software-based fragmentation rates
•
are going to be extremely slow depending on CPU load. PR1419371
In the output of show SNMP mib walk jnxBoxAnatomy, the chassis CLEI code and contents model is
•
reading data from the I2C bus and EEPROM. Because the fan is not present on the I2C bus and does
not have EEPROM, fan data can’t be displayed for chassis CLEI code and contents model. PR1420639
There is no support on separate counters for egress-dropped packets. Counters are reflected as part of
•
RED-dropped packets. PR1427148
Problem description: When end device (fan tray CPLD) I2C line is grounded or pulled low, other device
•
write/reads are failing. From our testing, we have concluded the following: We have verified isolation
functionality when the device is in the problem state, it's working fine (verified through software
simulation). But in this case where we grounded one of the fan tray CPLD i2c lines to verify the failed
test case, then entire circuit will get stalled and it leads to write fail for other devices also such as the
PEM, and temperature. This is a hardware limitation. PR1427222
These error messages can be seen sometimes if the optics module is being unplugged in between the
•
EEPROM read. This is expected and does not impact any functionality. PR1429016
Packet rates are not seen for aggregated Ethernet logical interface. PR1429590
•
Multicast packets are flooded in a BD if snooping is not enabled. If interfaces x and y belong to a BD,
•
then all multicast packets will be flooded to both x and y interface. If packets are received from interface
x, packets will be flooded to x and y in ingress but discarded in the egress path for interface x because
packet is received from the same interface. But these packets are also counted in the VOQ and hence
we are seeing more queue statistics. It is a known hardware limitation. monitor interface xe-0/0/30Input
Any packet greater than the MTU size are accounted for oversized packets. Packets exceeding MTU
•
sizes are not considered for Jabber check. PR1429923
The statistics are accessed through Broadcom API, which is the same for both tagged and untagged
•
packets. This cannot be changed in accordance with MX Series, because it is direct access from Broadcom
without any statistics changes specific to tagging from ACX5448 side. It will impact other statistics if
changes are made. PR1430108
The port LEDs glowing during system/vmhost halt state is the expected behavior across all ACX Series
•
platforms. Even the system LED glows during halt state. PR1430129
These are initial transient messages seen and do not have any functional impact. PR1430355
•
21
1-Gigabit Ethernet interfaces are shown as “xe”. Therefore, the cosmetic issue is observed with respect
•
to autonegotiation parameters although there is no impact on functionality. PR1430835
If Layer 2 VPN sessions have OAM control-channel option set to router-alert-label, the no-control-word
•
option in L2VPN shouldn't be used for BFD sessions to come up. PR1432854
BCM SDK currently does support statistics, and we see routes are getting reinstalled on a periodic basis.
•
SDK does not support statistics unless we move to Flex mode in KBP. This is a product limitation today.
PR1435579
New rate of 1.8 MB/s and which takes 16-17 min to copy the ACX5448 image (1.9G image size) -
•
ACX5448 rates are less than Misha because the rate limiter is in bps and does not support pps-based
(hardware limitation from DNX)*Avg size is 512. Hence rate is approximately one third of Misha rate.
In file copy cases, normal pkt size seen are 1500 pkt sizes. PR1439960
The hold timer expiry is common across all platforms. It is not specific to ACX5448-D. PR1439980
•
Remote loopback is not supported on ACX5448-D. PR1443517
•
The PEM entries for jnxFruName SNMP index are shown twice. PR1446215
•
ACX Series routers support only 900 joins of IGMPv3 users per second. PR1448146
•
The 2000 EVPN IRB scale is not hitting due to hardware limitation of filter entries that can be installed
•
for EVPN instances. We can support only 1000 scale for Junos OS release 19.2. This is Broadcom
limitation and cannot be changed. PR1461309
Counters for filtering based on DA MAC and SA MAC are not supported, because QMX doesn't have
•
any separate counter to count matched or dropped packets with interface MAC address. PR1463981
SEE ALSO
What's New | 11
What's Changed | 16
Open Issues | 22
Resolved Issues | 25
Documentation Updates | 31
Migration, Upgrade, and Downgrade Instructions | 32
Open Issues
IN THIS SECTION
22
General Routing | 22
MPLS | 25
Learn about open issues in this release for ACX Series routers.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks
online Junos Problem Report Search application.
General Routing
Forwarding when using nonexisting SSM map source address in IGMPv3 instead of pruning. This is a
•
day-1 design issue and needs a design solution. PR1126699
When Layer 3 packets are classified, DiffServ code points are not preserved but are getting lost at the
•
egress interface because of a chipset limitation. PR1322142
ACX5448: When a 1-Gigabit SFP transceiver is plugged into the router, autonegotiation is enabled by
•
default. There is no functional impact. Only the output of the show interfaces <intf-name> extensive
CLI command shows the autonegotiation field as disabled. PR1343679
If the set interfaces ae<>xaggregated-ether-options link-speed <x> configuration is used in the router,
•
after reboot AE interface remains down. Error seen in logs: /kernel: kernel did not add link ae1, link
speeds differ 1000000000 10000000000 /kernel: bundle ae1.0: link xe-0/3/0 not added due to speed
mismatch. PR1357012
Loopback status is not shown for OT interfaces on CLI (available from vty only). PR1358017
•
The SD (Signal Degrade) threshold is normally lower than the SF threshold (that is, so that as errors
•
increase, SD condition is encountered first). For the ACX6360 optical links there is no guard code to
prevent the user from setting the SD threshold, above the SF threshold which would cause increasing
errors to trigger the SF alarm before the SD alarm. This will not cause any issues on systems with correctly
provisioned SD/SF thresholds. PR1376869
ACX6360-OR: Enhancement is needed for FRR BER threshold SNMP support. PR1383303
•
On ACX6360/PTX10001 router, Tx power cannot be configured using + sign. PR1383980
•
More that expected traffic loss is observed during link failure (FRR convergence) and link restoration
•
test on L3VPN traffic over LDP-OSPF MPLS LSP.
Steps to re-create:
1. Layer 3 VPN traffic was flowing end to end on the active path in steady state.
2. Link down state is induced on primary path and traffic is shifted to backup path. Observation: More
than expected traffic loss is observed (around 1.5 seconds).
3. Link is restored and the traffic is moved to the active path. Observation: More than expected traffic
loss is observed (around 21 seconds).
23
The traffic loss percentage is not consistent and varies across each run, and this is the worst-case traffic
loss percentage observed. PR1387834
The switchover time observed was more than 50 minutes under certain soak test conditions with an
•
increased scale with a multiprotocol multirouter topology. PR1387858
IGMP packets over L2 Circuit with Control-Word are dropped in ACX5048. PR1394301
•
The ccc logs are not compressed after rotation. PR1398511
•
A jnxIfOtnOperState trap notification is sent for all ot interfaces. PR1406758
•
Layer 2 rewrite is happening on regular bridge domain and VLAN interfaces, although there are some
•
service dependencies (VPLS in this case) due to which, the egress interface map table is not updated
properly with the Layer 2 rewrite map ID. As a result, the rewrite does not work. PR1414414
Clock class value is incorrect in default data (show ptp clock) when the slave interface is down in the
•
PTP-OC device. PR1416421
On ACX5448 devices, the zero-touch provisioning (ZTP) process will proceed with image upgrade even
•
in situations when there is a mismatch between the platform name of the software image stored on FTP
or ZTP servers and the actual platform where the ZTP process is being run. PR1418313
The issue is not fixed in Junos OS Release 19.1 where inner VLAN tag classification will not work. It is
•
not fixed in 18.3R2 release. Also not fixed in 19.2R1 Release. There was a behavior change introduced
as part of PR1307666, where the inner VLAN tag is popped out on the ingress side when an IP packet
with double-tagged VLAN is received, and this change is needed for IP packets to work on proper transmit
on the egress interface. PR1422515
Under scale conditions, if multiple bridge-domains are deleted together, then sometimes Broadcom SDK
•
returns error Entry not found. This indicates that the resource is already freed up. PR1423308
On an ACX5448, the request system reboot command triggers a reboot on the host (Linux) instead of
•
just being limited to Junos OS. PR1426486
Traffic loss is seen if the configuration has /128 prefix routes and its limited to /128 only. This is due to
•
a known issue tracked in PR1445231. PR1429833
Any packets greater than the MTU size are accounted for as oversized packets. Packets exceeding MTU
•
sizes are not considered for Jabber check. PR1429923
The port LEDs glowing during system/vmhost halt state is the expected behavior across all ACX Series
•
platforms. Even the system LED glows during halt state. PR1430129
Packets dropped due to MTU checks in the output interface are not accounted for MTU errors. All
•
packets above MTU size are accounted for Oversized-packets in the input interface. PR1430446
Protocols get forwarded when using a nonexisting SSM map source address in IGMPv3 instead of pruning.
•
This is a day 1 design issue, and needs a design solution. PR1435648
24
On ACX5448 box, after issuing deactivate/activate "class-of-service", traffic drop might be seen.
•
PR1436494
In certain test conditions, it was observed that L2VPN at a scale of 16,000 had issues when all VPNs
•
were brought down and up. PR1439471
Recovery of Junos volume is not possible from the OAM menu. PR1446512
•
Drop profile maximum threshold might not be reached when the packet size is other than 1000 bytes.
•
This is due to the current design limitation. PR1448418
When an xe interface working in 1-Gigabit mode in ACX5448-D is added to a member link of an
•
aggregated Ethernet interface, the speed of the aggregated Ethernet interface is incorrectly shown as
10 Gbps. There is no functional impact. This is a display issue. PR1449887
It is not possible to form 125,000 IGMP groups with the ACX5448 router receiving 125,000 IGMP v2
•
reports per second. This is a product limitation from BCM and CPU host path queuing model. PR1454465
The issue is seen during unified ISSU to Junos OS Releases 20.1, 20.2, and 19.4. The upgrade is successful
•
but the forwarding plane (PFE) does not function. As a result, forwarding is affected. PR1483959
On ACX Series platforms with shaping configured, after deactivating and activating CoS the shaping
•
might not work and traffic drop would appear. PR1488935
In PTP environment some vendor devices acting as slave expecting announce messages at an interval
•
of -3 (8pps) from upstream master device. As of today announce message are configurable in range of
0 to 3. To support the above requirement engineering provided a hidden cli knob "set protocol ptp master
announce-interval -3". In the networks/design where we have this requirement. we can configure the
hidden cli otherwise regular cli which is in the range (0 to 3) can be configurable. Both the cli knobs are
mutually exclusive, commit error is expected if both are configured. This new change is applicable to
ACX platforms only excluding ACX5000. PR1507782
MPLS
The default behavior of local reversion has changed from Junos OS Release 16.1 and that impacts the
•
LSPs for which the ingress does not perform make-before-break. Junos OS does not perform
make-before-break for no-cspf LSPs. PR1401800
SEE ALSO
What's New | 11
What's Changed | 16
Known Limitations | 19
Resolved Issues | 25
Documentation Updates | 31
Migration, Upgrade, and Downgrade Instructions | 32
25
Resolved Issues
IN THIS SECTION
Resolved Issues: 19.2R3 | 26
Resolved Issues: 19.2R2 | 26
Resolved Issues: 19.2R1-S1 | 29
Resolved Issues: 19.2R1 | 30
Learn which issues were resolved in the Junos OS main and maintenance releases for ACX Series routers.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks
online Junos Problem Report Search application.
Resolved Issues: 19.2R3
General Routing
Policer discarded count is also shown incorrectly to the enq count of the interface-queue but traffic
•
behavior is fine as expected. PR1414887
ACX5448-D interfaces support: The input bytes value in the show interfaces extensive command output
•
is not at par with older ACX Series or MX Series devices. PR1430108
CoS: Egress queue statistics are not applicable to ae interfaces on ACX5048. PR1472467
•
ERP might not come up properly when MSTP and ERP are enabled on the same interface. PR1473610
•
Link does not come up when 100-Gigabit Ethernet is channelized to 4x25-Gigabit Ethernet interfaces.
•
PR1479733
During speed mismatch, QSFP28/QSFp+ the optics/cables might or might not work. PR1494600
•
Outbound SSH connection flap or memory leak issue might be observed during pushing configuration
•
to ephemeral DB with high rate. PR1497575
26
SFW sessions are not getting updated on ms interfaces in ACX500-i. PR1505089
•
PIC slot may be shut down less than 240 seconds because the over-temperature start time is handled
•
incorrectly. PR1506938
L2ALD crash is seen during stability test with traffic on scaled setup. PR1517074
•
MPLS
BGP session might keep flapping between two directly connected BGP peers because of the incorrect
•
TCP MSS (maximum segment size) in use. PR1493431
Routing Protocols
The BGP route-target family might prevent RR from reflecting Layer 2 VPN and Layer 3 VPN routes.
•
PR1492743
VPNs
The Layer 2 circuit neighbor might be stuck in RD state at one end of MG-LAG peer. PR1498040
•
Resolved Issues: 19.2R2
Class of Service (CoS)
The dfwd crash can be seen with the forwarding-class configuration in policers. PR1436894
•
General Routing
ACX5000 MacDrainTimeOut and bcm_port_update failed: Internal error. PR1284590
•
bcmDPC task is high even though Interupt START_BY_START flag set to 0. PR1329656
•
On an ACX Series router, the LED on a Gigabit Ethernet interface goes down when the 10-Mbps speed
•
is added. PR1385855
Link fault signaling (LFS) is not working on ACX5448 10/40/100GbE interfaces. PR1401718
•
Kernel memory leak in virtual-memory due to interface flaps (CVE-2020-1625). PR1407000
•
High CPU consumption for fxpc processes with class-of-service changes on AE interfaces. PR1407098
•
The optic comes with Tx enabled by default. As the port is administratively disabled, the port is stopped
•
but as the port has not been started, it does not disable Tx. PR1411015
ACX5448: 40G FEC on ACX5448 is default FEC is enabled need to align with our platforms MX/QFX
•
where FEC is NONE. PR1414649
ACX5448: BFD Timer values are not as per the configured 900ms with multiplier 3. The values are
•
showing 6.000 with multiplier 3 instead for most of the sessions. PR1418680
[ARP] ACX5448-D: 96000 ARPs are getting populated but only 47,000 next-hop entries are present.
•
Therefore, around 50% packet drop is observed. PR1426734
Drift messages in ACX2200, which is a PTP hybrid (PTP + Synchronous Ethernet) device. PR1426910
•
27
The chassisd process might crash with unsupported HCoS configuration when MX104 is used as the
•
fusion aggregation device. PR1430076
On ACX5448, upon reboot of an MC_LAG peer, when the peer comes up (but before hardware comes
•
up), there is a 10-20 second traffic hit on node1. PR1430910
ACX5448-D interface support: After chassis control restart, load balancing on the child interfaces of an
•
ae interface stops. PR1431206
The l2cpd process might crash and generate a core file when interfaces are flapping. PR1431355
•
ACX5448 might malfunction in encapsulating small packets if egress link is 40G or 100G. PR1434900
•
In ACX Series platforms, no-vrf-propagate-ttl might not work after the CoS configuration is deactivated
•
and then activated. PR1435791
LACP state might get stuck in 'Attached' state after disabling peer active members. PR1439268
•
Packet drop might be seen on an ACX Series platform when chained composite next hop is enabled for
•
L3VPN. PR1439317
Interface on ACX1100 remains down when using SFP-1FE-FX (740-021487). PR1439384
•
On ACX5448, DHCP packets are not transparent over Layer 2 circuit. PR1439518
•
When the interface is flapped between channelized configurations (25GbE to 100GbE), the AE interface
•
configuration is not cleaned up properly. PR1441374
ACX5448: Packet buffer error from Packet Forwarding Engine leading to memory leak when IGMP is
•
sent from NNI AC in Layer 2 circuit and VPLS. PR1442901
RED drops might be seen after link flaps or CoS configuration changes. PR1443466
•
ACX5448: The encapsulation flexible-vlan-tagging is not supported with the MPLS family; need to
•
provide commit error. PR1445046
ACX5448/18.3R1-S4.1 not performing proper dot1p CoS rewrite on interfaces configured with
•
l2circuit/local-switching/family ccc. PR1445979
In ACX Series routers, auto-exported routes between VRFs might not reply for ICMP echo requests.
•
PR1446043
Fans on an ACX5448-M might not be running at the correct speed. PR1448884
•
Layer 2 circuit with a backup-neighbor (hot-standby) configured might stop forwarding traffic after
•
failovers. PR1449681
Oper-state for et interface does not transition from 'init' to 'Normal'. PR1449937
•
FPC core files might be seen after changing the configuration of PTP or Synchronous Ethernet. PR1451950
•
Platforms: ACX5448-D interfaces support: After the 100-Gbps and 40-Gbps interfaces are disabled,
•
the Laser output power in show interfaces diagnostics optics shows some values. PR1452323
ACX5448 FPC crashed due to segmentation fault. PR1453766
•
28
Incorrect operating state displayed in SNMP trap for fan removal. PR1455577
•
ACX5048 SNMP polling will be stalled after a link flap or an SFP transceiver replacement, and
•
ACX_COS_HALP(acx_cos_gport_sched_set_strict_priority:987): Failed to detach logs will be seen.
PR1455722
ACX6360-OX: Enable the gigether option to configure Ethernet FEC on client ports. PR1456293
•
ACX5448-D and ACX5448-M devices do not display airflow information and temperature sensors as
•
expected. PR1456593
ACX5448 L2VPN with encapsulation-type ethernet stops passing traffic after a random port is added
•
with VLAN configuration. PR1456624
The rpd crash might be seen if a BGP route is resolved over the same prefix protocol next hop in an
•
inet.3 table that has both RSVP and LDP routes. PR1458595
Route resolution is not happening when the packet size is 10,000. PR1458744
•
Traffic might be silently dropped during link recovery in an open Ethernet access ring with ERPS
•
configured. PR1459446
ACX5000: SNMP MIB walk for jnxOperatingTemp not returning anything for FPC in new versions.
•
PR1460391
ACX5448-D interfaces and optics support: Sometimes, when the AE interfaces are brought up, there
•
are ARP resolution issues. PR1461485
On ACX Series platforms, the LLDP neighbor not up on a LAG after software upgrade to Junos OS
•
Release 18.2R3-S1. PR1461831
Memory leak on l2cpd process might lead to l2cpd crash. PR1469635
•
RED drop on interface even without any congestion. PR1470619
•
Egress queue statistics are not applicable to ae interface on model ACX5048. PR1472467
•
ERP might not come up properly when MSTP and ERP are enabled on the same interface. PR1473610
•
dcpfe core files are seen when disabling/enabling MACsec using Toby scripts. PR1479710
•
ACX5448 Layer 2 VPN with interface ethernet-ccc input-vlan-map/output-vlan-map can cause traffic
•
to be dropped silently. PR1485444
Interfaces and Chassis
Upgrade from releases before Junos OS Release 17.4R1 results in cfmd core files. PR1425804
•
MC-AE interface might show as unknown status if you are adding the subinterface as part of the VLAN
•
on the peer MC-AE node. PR1479012
Layer 2 Ethernet Services
DHCP request might get dropped in a DHCP relay scenario. PR1435039
•
29
Platform and Infrastructure
The REST API process becomes nonresponsive when a number of requests come at a high rate.
•
PR1449987
Routing Protocols
Export of loopback address to other VRF instances might not work on ACX Series, EX Series and QFX
•
Series platforms. PR1449410
MPLS LDP might still use stale MAC addresses of the neighbor even if the LDP neighbor's MAC address
•
changes. PR1451217
The rpd might crash continuously due to memory corruption in IS-IS setup. PR1455432
•
The routing protocol process (rpd) crashes while processing a specific BGP update information.
•
PR1448425
Receipt of certain genuine BGP packets from any BGP speaker causes rpd to crash. PR1497721
•
VPN
The l2circuit neighbor might be stuck in RD state at one end of MG-LAG peer. PR1498040
•
Resolved Issues: 19.2R1-S1
General Routing
Link Fault Signaling (LFS) do not work on ACX5448, ACX5410, ACX5440, and 100-Gigabit Ethernet
•
interfaces. PR1401718
In an ACX5448 platforms, when the Packet Forwarding Engine failed to allocate packet buffer, portion
•
of packet memories might not be free. PR1442901
Resolved Issues: 19.2R1
Class of Service (CoS)
The error message STUCK_BUFF : port_sp not empty for port 35 sp 1 pkts:1 is seen when a lag bundle
•
is configured with 64 lag links.. PR1346452
General Routing
The 1G copper module interface shows "Link-mode: Half-duplex". PR1286709
•
On an ACX ring topology, after link between ACX and MX flaps, VPLS RI on PE (MX) has no MAC of CE