Two-Tier Vlags With Vrrp - Lenovo RackSwitch G8264CS Application Manual

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Two-tier vLAGs with VRRP

G8264CS Application Guide for ENOS 8.4

vLAG Active‐Active VRRP makes the secondary vLAG switch route Layer 3

traffic, thus reducing routing latency. If it is used in a two‐tier vLAG environment,

there may be two VRRP master switches for one VRRP domain and their role will

constantly flap. To prevent such occurrences, there are two vLAG VRRP modes:

1. vLAG VRRP Active (Full Active‐Active) mode

In active mode, Layer 3 traffic is forwarded in all vLAG related VRRP domains.

To enable vLAG VRRP active mode on a switch, use the following command:

RS 8264CS(config)# vlag vrrp active

Note: This is the default vLAG VRRP mode.

2. vLAG VRRP Passive (Half Active‐Active) mode

In passive mode, Layer 3 traffic is forwarded in a vLAG related VRRP domain

only if either the switch or its peer virtual router is the VRRP master. To enable

vLAG VRRP passive mode on a switch, use the following command:

RS 8264CS(config)# no vlag vrrp active

To verify the currently configured vLAG VRRP mode you can use the following

RS 8264CS(config)# show vlag vrrp