Cisco Remote PHY Shelf 7200 Start Up
Configuration Guide for Cisco Remote PHY Shelf
7200 Software 1.1
• Cisco Remote PHY System Overview, on page 1
• Cisco Remote PHY Shelf 7200 Bring Up, on page 7
• Synchronizing Time on Cisco Remote PHY Shelf 7200, on page 15
• DEPI/UEPI/L2TP integration with RPD, on page 27
• DEPI Latency Measurement, on page 31
• Multiple Cores, on page 35
• GCPP Support for Remote PHY, on page 39
Cisco Remote PHY System Overview
Finding Feature Information
Your software release may not support all the features that are documented in this module. For the latest
feature information and caveats, see the release notes for your platform and software release. The Feature
Information Table at the end of this document provides information about the documented features and lists
the releases in which each feature is supported.
Introduction
Driven by market evolution towards triple-play services, cable operators in emerging markets are seeking
standardized and digital fiber-based solutions for economical and future proof access technologies. Much of
the demand is driven by the need to provide higher bandwidth packet transport for Internet connectivity, video
and voice services.
CHAPTER 1
• Introduction, on page 1
• Hardware Compatibility Matrix for Cisco Remote PHY Shelf 7200, on page 2
• Benefits, on page 2
• Cisco Remote PHY Shelf 7200 Network, on page 2
• Cisco cBR-8 Line Card for Remote PHY, on page 3
• Cisco Remote PHY Shelf 7200, on page 4
Data Over Cable Systems Interface Standard (DOCSIS®) is a standardized technology for services over cable
and thus has strong interoperability between system providers. It also provides robust Quality of Service (QoS)
methods, ensuring packet delivery during periods of network congestion. Traditionally, DOCSIS runs on
linear fiber (or HFC) to provide service and is not naturally applicable for digital fiber. Cisco has bridged the
gap by introducing a new access technology called the Remote PHY.
Existing Architecture
In the emerging markets, most triple-play consumers live in multi-tenant buildings (referred to as Multi
Dwelling Units or MDU) with the number of residents usually being less than 500 residents per building or
cluster. These buildings are typically served by fiber with one of several “final 100 meter” technologies
installed in the buildings. These technologies include fiber, twisted pair, Ethernet, and coaxial. Cable operators
have access to the cable in the building and use this cable for their services. Several technologies exist for
enabling two-way services over cable. These include a number of proprietary and vendor-specific methods.
However, a standards-based approach to using cable is typically preferred by operators, since this ensures
vendor interoperability.
Cisco Remote PHY Shelf 7200 Start Up Configuration Guide for Cisco Remote PHY Shelf 7200 Software 1.1
Hardware Compatibility Matrix for Cisco Remote PHY Shelf 7200
Need for the Cisco Remote PHY Solution
DOCSIS and EuroDOCSIS are standards that define two-way operation over a cable network. DOCSIS
provides the necessary Quality of Service (QoS) tools for ensuring voice call connectivity during periods of
network congestion that are anticipated in triple-play networks. DOCSIS is a robust and mature technology
for voice, video, and IP video services.
The Cisco Remote PHY solution leverages existing IP technologies like Ethernet PON (EPON), Gigabit-capable
Passive Optical Networks (GPON), and Metro Ethernet (MetroE) equipment; it deploys DOCSIS in MDUs
over digital fiber to enable two-way services over cable.
Hardware Compatibility Matrix for Cisco Remote PHY Shelf
7200
Note
Unless otherwise specified, the hardware components introduced in a given Cisco Remote PHY Shelf 7200
Software Release are supported in all subsequent releases.
Benefits
Table 1: Hardware Compatibility Matrix for the Cisco Remote PHY Shelf 7200
Cisco Remote PHY Shelf 7200Cisco CMTS Platform
Cisco cBR-8 Converged Broadband Router with
Cisco IOS XE Gibraltar 16.10.1 and Later Releases
• Cost effectively addresses bandwidth requirements for today’s Service Groups with low to medium
bandwidth requirement
• Dramatically reduces cost of addressing high bandwidth requirements in conjunction with future cloud
CMTS solution
• Lower hub space and power requirements
• Enables independent scaling of CMTS Core and PHY
• Migration path to Cloud CMTS
Cisco Remote PHY Shelf 7200 Software 1.1 and
Later Releases
Cisco Remote PHY Shelf 7200
• PID—HA-RPHY
Cisco Remote PHY Shelf 7200 Network
Cisco Remote PHY Shelf 7200 solution supports the following network architecture, its benefits include:
Cisco Remote PHY Shelf 7200 Start Up Configuration Guide for Cisco Remote PHY Shelf 7200 Software 1.1
• Share cBR-8 capacity across multiple hubs
• Fewer RPHY cores required
• Increased cBR-8 scale (ports/SG)
• Higher core license utilization
Cisco cBR-8 Line Card for Remote PHY
Cisco cBR-8 Line Card for Remote PHY
Cisco cBR-8 router supports following line card for the Remote PHY system.
Cisco CCAP RF Line Card for Remote PHY
The Cisco CCAP RF line card for remote PHY architecture is available in two flavours:
• CBR-LC-8D31-16U30—This RF line card with the downstream and upstream PHY modules can be
connected with the Cisco GS7000 node by configuring it using the card cBR-CCAP-LC-40G r-phy
command.
• CBR-CCAP-LC-40G-R—This RF line card with no downstream and upstream PHY modules can be
connected with the Cisco GS7000 node and Remote PHY Shelf 7200. For more information, see Cisco
cBR Series Converged Cable Access Platform 40G Remote PHY Line Card Data Sheet
.
Cisco Digital Physical Interface Card
The Cisco Digital Physical Interface Card (DPIC) transmits and receives RF signals between the subscriber
and headend over the hybrid fiber-coaxial (HFC) system and is DOCSIS-compliant. This interface card is
designed specifically for the Cisco cBR router. The PID is cBR-DPIC-8X10G. For more information, see
Cisco cBR Series 8x10G Remote PHY Digital Physical Interface Card Data Sheet.
The DPIC is installed in the CMTS and connected to the Cisco GS7000 node via the EPON, GPON, or Metro
Ethernet. It supports both downstream and upstream traffic. Both the downstream and upstream traffic share
the same ports.
Cisco Remote PHY Shelf 7200 Start Up Configuration Guide for Cisco Remote PHY Shelf 7200 Software 1.1
PIC
The PIC card uses solid-state switch to create a switching path between the dedicated protect RPD in slot 6
and the 12 other RPDs in the Cisco Remote PHY Shelf 7200 chassis. The features of the Cisco Remote PHY
Shelf 7200 PIC are:
• Surge protector
• Demodulator
• Power meter
• US test signal
• Solid-state switches 2:1, 6:1
• DS RF amp for better return loss matching
• MES in control of all PIC functions through I2C control
• Simplified power design and power sequencer
• DS at MCX connector meets the DOCSIS 3.1 RF specification
• ACT2 PID
• FLASH holding calibration data
• No firmware upgradeable images
• US and DS ports accept 75 Ohm accepts compression type MCX connectors
Your software release may not support all the features that are documented in this module. For the latest
feature information and caveats, see the release notes for your platform and software release. The Feature
Information Table at the end of this document provides information about the documented features and lists
the releases in which each feature is supported.
• Hardware Compatibility Matrix for Cisco Remote PHY Shelf 7200, on page 7
• Information about Bring Up, on page 7
• How to Bring Up Cisco Remote PHY Shelf 7200, on page 8
Hardware Compatibility Matrix for Cisco Remote PHY Shelf
7200
Note
Unless otherwise specified, the hardware components introduced in a given Cisco Remote PHY Shelf 7200
Software Release are supported in all subsequent releases.
Table 2: Hardware Compatibility Matrix for the Cisco Remote PHY Shelf 7200
Cisco cBR-8 Converged Broadband Router with
Cisco IOS XE Gibraltar 16.10.1 and Later Releases
Information about Bring Up
Bring up process is prerequisite to the operation of the remote PHY system, just like the cable modem bring
up in a DOCSIS system.
Shlef(config)#mgmt ip 1.200.1.4 netmask 255.255.255.0 gateway 1.200.1.0
User also need to configure SFP+ port mode and eRPD trunk mode based on actual network topology. Refer
to Cisco Remote PHY Shelf 7200 Backhaul Port Mapping and Link Redundancy Configuration and Cisco
Remote PHY Shelf 7200 Trunk VLAN Configuration for more details.
Configuring DHCP Server
You can choose to configure the DHCP server using any of the following methods.
Configuring DHCP Server using IPv4
To configure DHCP server using IPv4, follow the steps below:
1. Add option for CCAP-Core. Fill in the name, DHCP type, and vendor option string as shown in the figure
below.
2. Define option. Fill in the option number and name as shown in the figure below.
Cisco Remote PHY Shelf 7200 Start Up Configuration Guide for Cisco Remote PHY Shelf 7200 Software 1.1
Configuring DHCP Server using IPv6 Stateless
Configuring DHCP Server using IPv6 Stateless
The Cisco Remote PHY System supports the Stateless Address Auto Configuration (SLAAC). IPv6 address
assignment of the RPD is governed by the configuration bits set in the ICMPv6 Router Advertisement (RA)
message and the presence of a valid prefix in the Prefix Information Option (PIO). For more information
about RPD IPv6 address assignment, refer to section 6.7 of Remote PHY Specification.
To configure DHCP server using IPv6 Stateless and enable SLAAC, follow the steps below:
1. Configure Prefix Type to “stateless” in CNR prefix.
2. Configure ICMPv6 Router RA message M Bit=0 and O Bit =1.
Note
It is recommended that you follow the DHCP options listed in Table 2 - Router Advertisement M Bit and O
Bit Settings For SLAAC of section 6.7.1 (CM-SP-R-PHY-I10) or 6.6.1 (CM-SP-R-PHY-I11) in the Remote
PHY Specification.
To display the RPD get IPv6 address by SLAAC, use the show dhcp command.
This section explains how to synchronize time on the RPD and CCAP core of the Cisco cBR Router.
• Hardware Compatibility Matrix for Cisco Remote PHY Shelf 7200, on page 15
• Information about Time Synchronization, on page 15
• How to Configure Time Synchronization, on page 16
• Configuration Examples, on page 25
• Feature Information for Synchronizing Time on Cisco Remote PHY Shelf 7200, on page 26
Hardware Compatibility Matrix for Cisco Remote PHY Shelf
7200
Note
Unless otherwise specified, the hardware components introduced in a given Cisco Remote PHY Shelf 7200
Software Release are supported in all subsequent releases.
Table 3: Hardware Compatibility Matrix for the Cisco Remote PHY Shelf 7200
Cisco Remote PHY Shelf 7200Cisco CMTS Platform
Cisco cBR-8 Converged Broadband Router with
Cisco IOS XE Gibraltar 16.10.1 and Later Releases
Cisco Remote PHY Shelf 7200 Software 1.1 and
Later Releases
Cisco Remote PHY Shelf 7200
• PID—HA-RPHY
Information about Time Synchronization
In a Remote PHY system, synchronizing its local timestamp and reference frequency to the cable converged
access platform core function (CCAP Core) is important. The protocol used for this feature, the Precision
Cisco Remote PHY Shelf 7200 Start Up Configuration Guide for Cisco Remote PHY Shelf 7200 Software 1.1
Time Protocol (PTP), helps in synchronizing time between a CCAP core function and a series of remote PHY
devices (RPD) that enable R-PHY and provides support for converged DOCSIS, video, and out-of-band
(OOB) services.
Cisco CBR-8 supports PTP Ordinary Clock (OC) slave mode, in which the PTP slave ports are from the
backhaul 10GE Ethernet ports or the management Ethernet ports of SUP PIC.
Remote DOCSIS Timing Interface (R-DTI) is the network synchronization protocol used between CCAP-core
and R-PHY. When traffic from the CCAP-Core is received on the downstream receiver, the following processes
occur:
• Terminates DEPI framing
• Extracts the payload, frames it, modulates, and transmits it out
During the upstream process, the signal is received from the coax and the system demodulates it. From the
FEC payload, the DOCSIS frames are extracted and placed in the UEPI encapsulation. The frames are then
transmitted through the upstream transmitter to the CCAP core. A local CPU manages DEPI and GCP control
planes, and interfaces with network management. A clocking circuit interfaces with the R-DTI and manages
clocking for the R-DTI entity.
How to Configure Time Synchronization
Note
To know more about the commands referenced in this module, see the Cisco IOS Master Command List.
Configuring Time Interface and PTP domain
To configure time interface and PTP domain, use the following procedure.
enable
configure terminal
interface type [slot_#/port_#
interface Loopback1588
ip address <IP Address/subnet>
interface TenGigabitEthernet<slot/port>
ip address <IP Address/subnet>
ip route < PTP master IP Address/subnet> < loopback IP Address>
ptp clock ordinary domain 55 (This is for CBR PTP connection)