Reference Guide

00:00:5e:00:01:6f
Virtual IP address:
10.10.10.1 10.10.10.2 10.10.10.3 10.10.10.10
Authentication: (none)
------------------
TenGigabitEthernet 1/2, VRID: 111, Net: 10.10.2.1
State: Master, Priority: 125, Master: 10.10.2.1 (local)
Hold Down: 0 sec, Preempt: TRUE, AdvInt: 1 sec
Adv rcvd: 0, Bad pkts rcvd: 0, Adv sent: 601, Gratuitous ARP sent: 2
Virtual MAC address:
00:00:5e:00:01:6f
Virtual IP address:
10.10.2.2 10.10.2.3
Authentication: (none)
Dell(conf)#
Configuring VRRP Authentication
Simple authentication of VRRP packets ensures that only trusted routers participate in VRRP processes.
When you enable authentication, the system includes the password in its VRRP transmission. The receiving router uses that
password to verify the transmission.\
NOTE: You must configure all virtual routers in the VRRP group the same: you must enable authentication with the same
password or authentication is disabled.
To configure simple authentication, use the following command.
● Configure a simple text password.
INTERFACE-VRID mode
authentication-type simple [encryption-type] password
Parameters:
○ encryption-type: 0 indicates unencrypted; 7 indicates encrypted.
○ password: plain text.
The following example shows how to configure VRRP authentication. The bold section shows the encryption type (encrypted)
and the password.
Dell(conf-if-te-1/1-vrid-111)#authentication-type ?
Dell(conf-if-te-1/1-vrid-111)#authentication-type simple 7 dell
The following example shows how to verify VRRP authentication. The bold section shows the encrypted password.
Dell(conf-if-te-1/1-vrid-111)#show conf
!
vrrp-group 111
authentication-type simple 7 387a7f2df5969da4
priority 255
virtual-address 10.10.10.1
virtual-address 10.10.10.2
virtual-address 10.10.10.3
virtual-address 10.10.10.10
Dell(conf-if-te-1/1-vrid-111)#
Disabling Preempt
The preempt command is enabled by default. The command forces the system to change the MASTER router if another router
with a higher priority comes online.
Prevent the BACKUP router with the higher priority from becoming the MASTER router by disabling preempt.
NOTE:
You must configure all virtual routers in the VRRP group the same: you must configure all with preempt enabled or
configure all with preempt disabled.
Because preempt is enabled by default, disable the preempt function with the following command.
842
Virtual Router Redundancy Protocol (VRRP)