Reference Guide

VRRP Optimized Forwarding
To enable optimized L3 forwarding over VLT, use VRRP Active-Active mode. By default, VRRP Active-Active mode is enabled in the VLAN
interfaces. In Active-Sctive mode, each peer locally forwards L3 trac, resulting in reduced trac ow over the VLTi. Congure the same
L3 static and dynamic routing on each peer so that the L3 reachability and routing tables are the same on both peers.
1 Enable VRRP Active-Active mode in VLAN-INTERFACE mode.
vrrp mode active-active
2 Congure VRRP on the L3 VLAN that spans both peers.
3 Repeat the steps on the VLT peer.
Congure VRRP active-active mode — peer 1
OS10(conf-if-vl-10)# vrrp mode active-active
Congure VRRP active-active mode — peer 2
OS10(conf-if-vl-10)# vrrp mode active-active
View VRRP conguration
OS10# show running-configuration interface vlan 10
!
interface vlan10
no shutdown
no vrrp mode active-active
OS10#
View VLT information
To monitor the operation or verify the conguration of a VLT domain, use a VLT show command on primary and secondary peers.
• View detailed information about the VLT domain conguration in EXEC mode, including VLTi status, local and peer MAC addresses,
peer-routing status, and VLT peer parameters.
show vlt domain-id
• View the role of the local and remote VLT peer in EXEC mode.
show vlt domain-id role
• View any mismatches in the VLT conguration in EXEC mode.
show vlt domain-id mismatch
• View detailed information about VLT ports in EXEC mode.
show vlt domain-id vlt-port-detail
• View the current conguration of all VLT domains in EXEC mode.
show running-configuration vlt
View peer-routing information
OS10# show vlt 1
Domain ID : 1
Unit ID : 1
Role : primary
Version : 1.0
Local System MAC address : 90:b1:1c:f4:99:93
VLT MAC address : 90:b1:1c:f4:99:93
IP address : fda5:74c8:b79e:1::1
Delay-Restore timer : 1000 seconds
Peer-Routing : Disabled
Peer-Routing-Timeout timer : 0 seconds
VLTi Link Status
port-channel1000 : up
528
Virtual link trunking