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
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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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