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Router Redundancy Commands
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vrrp authentication
This command specifies the key used to authenticate VRRP packets received from
other routers. Use the no form to prevent authentication.
Syntax
vrrp group authentication key
no vrrp group authentication
• group - Identifies the virtual router group. (Range: 1-255)
• key - Authentication string. (Range: 1-8 alphanumeric characters)
Default Setting
No key is defined.
Command Mode
Interface (VLAN)
Command Usage
• All routers in the same VRRP group must be configured with the same
authentication key.
• When a VRRP packet is received from another router in the group, its
authentication key is compared to the string configured on this router. If the
keys match, the message is accepted. Otherwise, the packet is discarded.
• Plain text authentication does not provide any real security. It is supported
only to prevent a misconfigured router from participating in VRRP.
Example
vrrp priority
This command sets the priority of this router in a VRRP group. Use the no form to
restore the default setting.
Syntax
vrrp group priority level
no vrrp group priority
• group - Identifies the VRRP group. (Range: 1-255)
• level - Priority of this router in the VRRP group. (Range: 1-254)
Default Setting
100
Command Mode
Interface (VLAN)
Console(config-if)#vrrp 1 authentication bluebird
Console(config-if)#