Cisco Systems OC-12-STM-14 User Manual
Cisco IOS Software Configuration for the 1-Port
Channelized OC-12/STM-4 (DS3) Line Card
This document describes the software conf iguratio n procedure for the 1-por t channelized OC-12/STM-4
(DS3) line card on the Cisco 12000 Series Router. This line card is sometimes referred to as the
Channelized OC-12 to DS3 line card or the OC 12-DS3 line c ard.
Feature History for the 1-Port Channelized OC-12/STM-4 (DS3)
Release Modification
11.2(19)GS4 This feature was introduced.
12.0(8)S This feature was introduced on the 12.0 S train.
Contents
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image
support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on
Cisco.com. If you do not have an account or have forgotten your username o r passwo rd, click Cancel at
the login dialog box and follow the instructions that appear.
• Prerequisites for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card, page 2
• Information About the 1-Port Channelized OC-12/STM-4 (DS3) Line Card, page 2
• How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card, page 2
• Configuration Examples for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card, page 17
• Additional References, page 19
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Copyright © 2004 Cisco Systems, Inc. All rights reserved.
Cisco IOS Software Configuration for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
Prerequisites for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
Prerequisites for the 1-Port Channelized OC-12/STM-4 (DS3)
Line Card
The Cisco 12000 Series Router must have at least one clock and scheduler card (CSC) installed that
provides a one-quarter bandwidth to support the req uirements of the 1-p ort chan nelized OC-12/ST M-4
(DS3) line card.
Information About the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
The 1-port channelized OC-12/STM- 4 (DS3) line card provides 12 channels of DS3 multiplexed over a
single 622-Mbps OC-12 port. The 1-port channelized OC-12/STM-4 (DS3) line card interfaces through
an Add Drop Multiplexer (ADM) with other DS3 line cards at DS3 line rates in a configuration that
usually consists of a Cisco 7200 Series Ro uter and a Cisco 7500 Series Router configured with the
packet-over-E3/T3 (POET) port adapter , or a third-party T3 data service unit (DSU) such as Digital Link,
Larscom, or Kentrox.
The 1-port channelized OC-12/STM-4 (DS3) line card interfaces with the Cisco 12000 Series Router
switch fabric and provides one OC-12 duplex SC single-mode intermediate -reach Synchronous Optical
Network (SONET) connection.
How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
The following sections provide information for configuring and verifying the configuration.
• Configuring the OC-12 Controller, page 2
• Configuring the DS3 Serial Interface, page 4
• Cisco Remote Connection Management, page 5
• Using show Commands to Check System Status, page 8
• Using Loopback Command s, page 12
• Configuring DS3 Port BER Testing, page 13
Configuring the OC-12 Controller
Use the configure command to configure the new OC-12 controller. A Cisco 12000 Series Router
identifies a controller by slot/port. The current OC-12 controller-configurable parameter settings are
displayed as part of the show controller oc12 number/0 command, as in the following example:
Router# show controller oc12 1/0
OC12_CH_DS31/0
The current state of the controller is up
Current configurable parameter settings:
Clock source is LINE, Payload scrambling is ON
Loopback is NONE
Router#
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How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
(Remainder of displayed text omitted from example)
Table 1 shows the default OC-12 controller configuration of a 1-port channelized OC-12/STM-4 (DS3)
line card in a Cisco 12000 Series Router. In controller configuration mode, select an OC-12 controller
for configuration using the controller oc12 slot/port command.
Table 1 1-Port Channelized OC-12/STM-4 (DS3) Line Card Controller Configuration Default Values
Parameter Configuration Command Default Value
Clock source [no] clock source [internal | line] line
Loop internal [no] loopback [internal | line] no loopback
Shutdown [no] shutdown no shutdown
The following steps make up a basic controller configuration for the 1-port channelized OC-12/STM-4
(DS3) line card on a router.
Step 1 Enter global configuration mode by entering configure terminal at the privileged EXEC prompt:
Router# configure terminal
Router(config)#
Step 2 Enter controller configuration mode by entering the controller OC-12 slot/port global configuration
command and specify the router slot number and port number:
Router(config)# controller OC12 1/0
Router(config-controller)#
Step 3 Set the clock source by entering the clock source cont roller co nfiguration command and specify line or
internal:
Router(config-controller)# [no] clock source {line | internal}
Use the no form of this command to restore the defaul t value, line.
Step 4 To change the OC-12 controller payload scrambling:
Router(config-controller)# [no] scramble
Use the no form of this command to remove scrambling. The default value is scrambling.
Step 5 To change the OC-12 controller loopback mode:
Router(config-controller)# [no] loopback {line | internal}
Use the no form of this command to remove the loop.
Step 6 To change the shutdown state to up and enable the controller, enter the no shutdown controller
configuration command:
Router(config-controller)# [no] shutdown
The no shutdown command passes an enable command to th e 1-port chann elized OC-12/STM-4 (DS3)
line card. It also causes the line card to configure itsel f based on the pr evious configuratio n comm and s
sent.
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How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
Configuring the DS3 Serial Interface
After you verify the OC-12 contr oller configuration, you can conf igure the associated DS3 channel and
serial interfaces on the OC-12 controller. Be prepared with the information you will need, such as the
interface IP address.
The following sections describe how to enable an interface and specify IP routing. You may also need
to enter other configuration commands, depending on your system configuration requirements. For
descriptions of configuration commands and the conf iguration options a v ailable, refer to th e appropriate
software publications listed in the “Related Documents” section on page 19.
A Cisco 12000 Series Router identifies an interface on the 1-port channelized OC-12/STM-4 (DS3) line
card by its chassis slot number, line card port number, and DS3 channel number, in the format
slot/port:channel. For example, the slot/port:channel# address of the first DS3 serial interface on a
1-port channelized OC-12/STM-4 (DS3) line card installed in line card slot 1 is 1/0:1. The port number
is 0.
Table 2 shows the default DS3 serial interface configuration of an enabled line card. At the prompt,
specify the new interface to configure by entering the interface command, followed by the type (serial)
and slot/port:channel#.
Table 2 1-Port Channelized OC-12/STM-4 (DS3) Line Card Configuration Default Values
Parameter Configuration Command Default Value
Cyclic Redundancy Check crc [16 | 32] 16
Encapsulation encapsulation [hdlc | ppp] hdlc
Framing framing {c-bit | m13} c-bit
Idle character mode [no] idle-character [flags | marks] flags
Invert data [no] invert data no invert data
Keepalive [no] keepalive keepalive
Maximum transmission unit (mtu) [no] mtu bytes 4470 bytes
Transmitter delay [no] transmitter-delay # of idle
0
characters
Use the following procedures to configure the 1-port channelized OC-12/STM-4 (DS3) line card:
Step 1 Enter privileged EXEC mode by entering the enable command. The system will prompt you for a
password if one is set.
Router> enable
Router#
Press the Return key after each configuration step, unless otherwise noted.
Step 2 Enter global configuration mode by entering the configure terminal command:
Router# configure terminal
Router(config)#
Step 3 At the global configuration mode prompt, specify the new interface to configure by entering the
interface command, followed by the type (serial) and slot/port:channel# (line card
slot number/port number:channel number).
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The prompt changes to interface conf iguration mode. The follo wing e xample is for a 1-port channelized
OC-12/STM-4 (DS3) line card in chassis slot 1:
Router(config)# interface serial 1/0:1
Router(config-if)#
Step 4 Specify framing by selecting the framing c-bit serial interface configuration command:
Router(config-if)# framing c-bit
Step 5 Enable payload scrambling by selecting the scramble serial interface configuration command:
Router(config-if)# scramble
Step 6 Assign an IP address and subnet mask to the interface with the ip address configuration command, as
in the following example:
Router(config-if)# ip address 10.1.2.3 255.0.0.0
Step 7 Turn off keepalive messages:
Router(config-if)# no keepalive
Although some encapsulations benefit from keepalive processing (for example, HDLS), Cisco 12000
Series Routers do not require keepalive messages.
Step 8 Change the shutdown state to up and enable the interface:
Router(config-if)# no shutdown
The no shutdown command passes an enable command to th e 1-port chann elized OC-12/STM-4 (DS3)
line card. It also causes the line card to configure itsel f based on the pr evious configuratio n comm and s
sent.
Step 9 Add any other configuration commands required to enable routing protocols and adjust the interface
characteristics.
Step 10 When you have included all the configuration commands to complete the configuration, type end or
enter ^Z (hold down the Control key while you press Z) to exit configuration mode.
Step 11 Write the new configuration to memory:
Router# copy running-config startup-config
Router#
The system displays an OK message when the configuration has been stored.
After you have completed your configuration, you can check it using
explanation of show commands, see the “Using show Commands to Check System Status” section on
page 8.
Cisco Remote Connection Management
The 1-port channelized OC-12/STM-4 (DS3) line card consists of high-density DS3 service th rou gh 12
channels that provide DS3 interfaces through fiber-optic connectors for the Cisco 12000 Series Router.
There are two sides to the network, a local (near-end) side and a remote (far-end) side. The 1-port
channelized OC-12/STM-4 (DS3) line card supports three third-party DSU vendors (Digital-Link,
Kentrox, and Larscom) and Internet Service Provider (ISP)-provided DS3 lines to enable connections
between a router and another device.
show commands. For an
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How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
You can connect the local (near-end) DS3 port to the remote (far -end) DS3 port usi ng a third-party DSU.
Then use the telnet command from the local DS3 port to communicate with the remote DS3 port to
verify the DSU mode settings. If necessary, change the DSU mode settings on the local DS3 port to
match the DSU mode settings on the remote DS3 port. When the local and remote DS3 ports are
configured with matching DSU mode settings, you can start passing data traffic between the near end
and the far end of the network.
If the telnet command does not allow the local DS3 port to communicate with the remote DS3 port, it
indicates that the DSU mode settings on the local and remote DS3 ports do not match. You can establish
direct communication by removing the third-party DSU between the local and remote DS3 ports, and
using the default DSU mode, Cisco. When you establish a direct connection between the local and
remote DS3 ports, you can use Cisco IOS software commands that are specific to the Cisco Remote
Connection Management feature to verify the DSU mode settings on the remote DS3 port. (See Table 1.)
After the local and remote DS3 configuration settings match and you verify network connectivity, you
can reinsert a third-party DSU into the configuration.
The Cisco Remote Connection Management feature is Cisco proprietary. It works only with the
channelized 1-port channelized OC-12/STM-4 (DS3) line card and the 6-port or 12-port DS3 line cards
in the Cisco 12000 Series Router.
Table 3 shows the default DS3 channel configuration of an enabled 1-port channelized OC-12/STM-4
(DS3) line card. In serial interface channel configuration mode, select an OC-12 controller for
configuration using the interface serial slot/port:channel command.
Table 3 1-Port Channelized OC-12/STM-4 (DS3) Line Card DS3 Channel Configuration Default
Values
Parameter Configuration Command Default Value
DS3 channel, framing mode [no] framing [c-bit | m13]c-bit
DS3 channel, DSU mode [no] dsu mode
cisco
[cisco | digital-link | kentrox | larscom]
DS3 channel, DSU subrate
[no] dsu bandwidth Kilobits/sec 44210
bandwidth
DS3 channel, remote requests [no] dsu remote accept accept
DS3 channel, far-end DSU
[no] dsu remote fullrate user-configured value
bandwidth
DS3 channel, payload
[no] scramble no scramble
scrambling
DS3 channel, loopback mode [no] loopback
no loopback
[local | network | remote]
DS3 channel, BER testing [no] bert pattern
no bert
[2^15 | 2^20 | 2^23 | 0s | 1s ] interval
[1-1440]
Note You can use Cisco Re mote Conn ection Man agement only if (1) both ends of the DS3 line
are configured for C-bit parity mode, and (2) the FEAC message from the DS3 payload
source terminal to the DS3 payload sink termin al is delivered unaltered.
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