Enable VSX and VRRP

Core 1
interface lag 100
description VSX-ISL
no shutdown
no routing
vlan trunk native 1 tag
vlan trunk allowed all
lacp mode active

interface 1/1/49
no shutdown
lag 100
interface 1/1/50
no shutdown
lag 100

interface 1/1/48
no shutdown
ip address 10.10.10.1/30

vsx
system-mac 00:00:00:00:00:11
inter-switch-link lag 100
role primary
keepalive peer 10.10.10.2 source 10.10.10.1
vsx-sync vrrp

interface vlan 100
ip address 192.168.100.2/24
vrrp 100 address-family ipv4
address 192.168.100.1 primary
priority 110
no shutdown
exit

router vrrp enable

Core 2
interface lag 100
description VSX-ISL
no shutdown
no routing
vlan trunk native 1 tag
vlan trunk allowed all
lacp mode active

interface 1/1/49
no shutdown
lag 100
interface 1/1/50
no shutdown
lag 100

interface 1/1/48
no shutdown
ip address 10.10.10.2/30

vsx
system-mac 00:00:00:00:00:11
inter-switch-link lag 100
role secondary
keepalive peer 10.10.10.1 source 10.10.10.2
vsx-sync vrrp

interface vlan 100
ip address 192.168.100.3/24
vrrp 100 address-family ipv4
address 192.168.100.1 primary
priority 90
no shutdown
exit

router vrrp enable

Check Status
sh vsx status
sh vrrp
show vsx configuration inter-switch-link

Test Failover
interface vlan 100
shutdown
sh vrrp
Failback
interface vlan 100
no shutdown
sh vrrp

Spanning-tree
Core 1
spanning-tree
spanning-tree mode mstp
spanning-tree priority 0

Core 2
spanning-tree
spanning-tree mode mstp
spanning-tree priority 1

Multi-chassis LAG
Core 1 & Core 2
interface lag 10 multi-chassis
no shutdown
no routing
vlan trunk native 1
vlan trunk allowed all
lacp mode active

interface 1/1/40
lag 10

Access Switch
interface lag 1
no shutdown
vlan trunk native 1
vlan trunk allowed all
lacp mode active

interface 1/1/49
lag 1
interface 1/1/50
lag 1