Cisco ASR 903 Guide

Layer 2 Solution
▀ Ethernet Port-channel
▄ Cisco ASR 903 Router Design and Deployment Guide
18
OL-30526-01
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 7010.5c51.8fbb
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi0/1/1 Desg FWD 20000 128.7 P2p
Gi0/1/2 Desg FWD 20000 128.8 P2p
ASR903-PE2# show span vlan 30
MST0
Spanning tree enabled protocol mstp
Root ID Priority 32768
Address 7010.5c51.8fbb
Cost 0
Port 16 (GigabitEthernet0/1/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 7010.5c51.a4bb
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi0/1/1 Root FWD 20000 128.16 P2p
Gi0/1/2 Altn BLK 20000 128.17 P2p
Ethernet Port-channel
Cisco ASR 903 router supports layer 2 and layer 3 port-channels, and only LACP is supported for link
aggregation. Here are the steps to create layer 3 port-channel.
interface Port-channel channel number
ip address x.x.x.x y.y.y.y
interface GigabitEthernet0/0/1
no ip address
negotiation auto
channel-group channel-number mode active
For layer 2 port-channel, if there are EFPs or EFP trunk configured under port-channel, l2 protocol peering is
needed under port-channel to enable LACP.
interface port-channel 1
service instance 1 ethernet
encapsulation untagged
bridge-domain id
l2protocol peer lacp

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English