Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.100.0 - Page 968

If are using VRRP version 2, you must configure the timer values in multiple of whole seconds. For example a timer value of 3 seconds or 300 centisecs are valid and equivalent. However, a time value of 50 centisecs is invalid because it not a multiple of 1 second. If you are using VRRP version 3, you must configure the timer values in multiples of 25 centisecs. If you are configured for VRRP version 2, the timer values must be in multiples of whole seconds. For example, timer value of 3 seconds or 300 centisecs are valid and equivalent. However, a timer value of 50 centisecs is invalid because it not is not multiple of 1 second. If are using VRRP version 3, you must configure the timer values in multiples of 25 centisecs. To change the advertisement interval in seconds or centisecs, use the following command. A centisecs is 1/100 of a second. • Change the advertisement interval setting. INTERFACE-VRID mode advertise-interval seconds The range is from 1 to 255 seconds. The default is 1 second. • For VRRPv3, change the advertisement centisecs interval setting. INTERFACE-VRID mode advertise-interval centisecs centisecs The range is from 25 to 4075 centisecs in units of 25 centisecs. The default is 100 centisecs. Examples of the advertise-interval Command The following example shows how to change the advertise interval using the advertise-interval command. Dell(conf-if-te-1/1)#vrrp-group 111 Dell(conf-if-te-1/1-vrid-111)#advertise-interval 10 Dell(conf-if-te-1/1-vrid-111)# The following example shows how to verify the advertise interval change using the show conf command. Dell(conf-if-te-1/1-vrid-111)#show conf ! vrrp-group 111 advertise-interval 10 authentication-type simple 7 387a7f2df5969da4 no preempt 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 Track an Interface or Object You can set Dell Networking OS to monitor the state of any interface according to the virtual group. Each VRRP group can track up to 12 interfaces and up to 20 additional objects, which may affect the priority of the VRRP group. If the tracked interface goes down, the VRRP group's priority decreases by a default value of 10 (also known as cost). If the tracked interface's state goes up, the VRRP group's priority increases by 10. The lowered priority of the VRRP group may trigger an election. As the Master/Backup VRRP routers are selected based on the VRRP group's priority, tracking features ensure that the best VRRP router is the Master for that group. The sum of all the costs of all the tracked interfaces must be less than the configured priority on the VRRP group. If the VRRP group is configured as Owner router (priority 255), tracking for that group is disabled, irrespective of the state of the tracked interfaces. The priority of the owner group always remains at 255. 968 Virtual Router Redundancy Protocol (VRRP)