Cisco ASR 903 Guide

Clocking
▀ Sync-E Configuration
▄ Cisco ASR 903 Router Design and Deployment Guide
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OL-30526-01
ASR903-R1 Configuration
interface GigabitEthernet0/1/1
! description to R3
synchronous mode ! enable sync-e under interface
!
interface GigabitEthernet0/1/0
description to R2
synchronous mode
network-clock synchronization automatic ! enable clock selection
algorithm
network-clock synchronization ssm option 1 ! to select E1 or T1 type
network-clock synchronization mode QL-enabled ! use Qualiy enabled mode
network-clock input-source 10 External R0 e1 crc4 ! BITS clock as source
network-clock wait-to-restore 30 global
esmc process ! enable ESMC process
ASR903-R2 Configuration
interface GigabitEthernet0/1/0
! description to R1
synchronous mode ! enable sync-e under interface
!
interface GigabitEthernet0/1/2
description to R4
synchronous mode
network-clock synchronization automatic ! enable clock selection
algorithm
network-clock synchronization ssm option 1 ! to select E1 or T1 type
network-clock synchronization mode QL-enabled ! use Qualiy enabled mode
network-clock input-source 10 interface Gig0/1/0 ! elect gi0/1/0 as candidiate
! lower priority is preferred
network-clock input-source 20 interface Gig0/1/2 ! elect gi0/1/2 as candidiate
network-clock wait-to-restore 30 global
esmc process ! enable ESMC process
ASR903-R3 Configuration
interface GigabitEthernet0/1/0
! description to R1
synchronous mode ! enable sync-e under interface
!
interface GigabitEthernet0/1/1
description to R4
synchronous mode
network-clock synchronization automatic ! enable clock selection
algorithm
network-clock synchronization ssm option 1 ! to select E1 or T1 type

Cisco ASR 903 Specifications

General

Form Factor	Modular
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Humidity	5% to 95% non-condensing
Redundancy	Yes, redundant power supplies and route processors
Operating System	Cisco IOS XE
Power Supply	AC or DC
Switching Capacity	240 Gbps
Operating Temperature	-40°C to 65°C (-40°F to 149°F)
MTBF	200, 000 hours
Supported Protocols	IPv4, IPv6, MPLS, L2VPN, L3VPN
Interfaces	Gigabit Ethernet, 10 Gigabit Ethernet, T1/E1