Connectivity Guide

Authentication
Simple authentication of VRRP packets ensures that only trusted routers participate in VRRP processes. When you enable authentication,
OS10 includes the password in its VRRP transmission. The receiving router uses that password to verify the transmission.
You must congure all virtual routers in the VRRP group with the same password. You must enable authentication with the same password
or authentication is disabled. Authentication for VRRPv3 is not supported.
1 Create a virtual router for the interface with the VRRP identier in INTERFACE mode, from 1 to 255.
vrrp-group vrrp-id
2 Congure a simple text password in INTERFACE-VRRP mode.
authentication-type simple—text text
simple—text text — Enter the keyword and a simple text password.
Congure VRRP authentication
OS10(config)# interface ethernet 1/1/5
OS10(conf-if-eth1/1/5)# vrrp-group 250
OS10(conf-eth1/1/5-vrid-250)# authentication simple-text eureka
Verify VRRP authentication conguration
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# vrrp-group 1
OS10(conf-eth1/1/1-vrid-1)# authentication simple-text dell
Disable preempt
Prevent the Backup router with the higher priority from becoming the master router by disabling the preemption process. 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.
You must congure all virtual routers in the VRRP group with the same settings. Congure all routers with preempt enabled or congure all
with preempt disabled.
1 Create a virtual router for the interface with the VRRP identier in INTERFACE mode, from 1 to 255.
vrrp-group vrrp-id
2 Prevent any backup router with a higher priority from becoming the Master router in INTERFACE-VRRP mode.
no preempt
Disable preempt
OS10(config)# interface ethernet 1/1/5
OS10(conf-if-eth1/1/5)# vrrp-group 254
OS10(conf-eth1/1/5-vrid-254)# no preempt
View running conguration
OS10(conf-eth1/1/5-vrid-254)# do show running-configuration
! Version 10.2.0E
! Last configuration change at Sep 24
07:17:45 2016
!
debug radius false
snmp-server contact http://www.dell.com/support/softwarecontacts
snmp-server location "United States"
username admin password $6$q9QBeYjZ$jfxzVqGhkxX3smxJSH9DDz7/3OJc6m5wjF8nnLD7/VKx8SloIhp4NoGZs0I/
Layer 3
505