If the interfaces on which you configure the VRID use authentication, the VSRP packets on those interfaces also must use the same authentication.
A VSRP session must be configured and running.
If you configure your device interfaces to use a simple password to authenticate traffic, VSRP interfaces can be configured with the same simple password, and VSRP packets that do not contain the password are dropped. If your interfaces do not use authentication, neither does VSRP. Repeat this task on all interfaces on all devices that support the VRID.
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From privileged EXEC mode, enter global configuration mode.
device# configure terminal
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Configure the VLAN on which a VSRP VRID is assigned.
device(config)# vlan 100
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Enter the simple text password configuration.
device(config-vlan-100)# vsrp auth-type simple-text-auth ourpword
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Verify the password.
device(config-vlan-200)# show vsrp
VLAN 200
auth-type simple text password
VRID 1
========
State Administrative-status Advertise-backup Preempt-mode save-current
initialize enabled enabled true false
Parameter Configured Current Unit/Formula
priority 100 0 (100-0)*(0.0/1.0)
hello-interval 1 1 sec/1
dead-interval 3 3 sec/1
hold-interval 3 3 sec/1
initial-ttl 2 2 hops
Member ports: ethe 1/1/1
Operational ports: None
Forwarding ports: None
Restart ports: None
