Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 1089
Changing the Advertisement Interval, advertise-interval
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Changing the Advertisement Interval By default, the MASTER router transmits a VRRP advertisement to all members of the VRRP group every one second, indicating it is operational and is the MASTER router. If the VRRP group misses three consecutive advertisements, the election process begins and the BACKUP virtual router with the highest priority transitions to MASTER. NOTE: To avoid throttling VRRP advertisement packets, Dell EMC Networking OS recommends increasing the VRRP advertisement interval to a value higher than the default value of one second. If you do change the time interval between VRRP advertisements on one router, change it on all participating routers. 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. DellEMC(conf-if-te-1/1)#vrrp-group 111 DellEMC(conf-if-te-1/1-vrid-111)#advertise-interval 10 DellEMC(conf-if-te-1/1-vrid-111)# The following example shows how to verify the advertise interval change using the show conf command. DellEMC(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 Virtual Router Redundancy Protocol (VRRP) 1089
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