Typical Configuration of VSX

The following is a very basic VSX configuration between two spine switches. Do note that the inter-switch-link (ISL) between the two spine switches is configured as regular lag, not a multi-chassis lag like a connected server would.

Spine-01
vrf keepalive

interface lag 254 no shutdown description ISL link no routing vlan trunk native 1 tag vlan trunk allowed all lacp mode active

interface 1/1/51 no shutdown mtu 9198 lag 254 interface 1/1/52 no shutdown mtu 9198 lag 254

vsx system-mac 02:01:00:00:01:00 inter-switch-link lag 254 role primary keepalive peer 192.168.255.1 source 192.168.255.0 vrf keepalive linkup-delay-timer 600 vsx-sync vsx-global

interface 1/1/47 no shutdown mtu 9198 vrf attach keepalive description VSX keepalive ip address 192.168.255.0/31

Spine-02
vrf keepalive

interface lag 254 no shutdown description ISL link no routing vlan trunk native 1 tag vlan trunk allowed all lacp mode active

interface 1/1/51 no shutdown mtu 9198 lag 254 interface 1/1/52 no shutdown mtu 9198 lag 254

vsx system-mac 02:01:00:00:01:00 inter-switch-link lag 254 role secondary keepalive peer 192.168.255.0 source 192.168.255.1 vrf keepalive linkup-delay-timer 600 vsx-sync vsx-global

interface 1/1/47 no shutdown mtu 9198 vrf attach keepalive description VSX keepalive ip address 192.168.255.1/31

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