https://community.extremenetworks.com/t5/extremeswitching-exos-switch/vrrp-don-t-pre-empt-is-not-working-as-expected/m-p/48419#M12658 What about the config:<BR /> configure vrrp vlan SR_A_userplane vrid 216 priority 254<BR /> <BR /> Doesnt that make side A priority? Wed, 20 May 2015 03:03:00 GMT Andre_Scott 2015-05-20T03:03:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/vrrp-don-t-pre-empt-is-not-working-as-expected/m-p/48418#M12657 we use in ericsson equipments exterme LAN switches X450e. we normally have 2 switches with VRRP enabled between them. the configuration of VRRP is like below:<BR /> <BR /> # Switch A (should be master)<BR /> create vrrp vlan SR_A_userplane vrid 216<BR /> configure vrrp vlan SR_A_userplane vrid 216 advertisement-interval 100 milliseconds<BR /> configure vrrp vlan SR_A_userplane vrid 216 priority 254<BR /> configure vrrp vlan SR_A_userplane vrid 216 dont-preempt<BR /> configure vrrp vlan SR_A_userplane vrid 216 add 172.19.136.67 <BR /> enable vrrp vlan SR_A_userplane vrid 216<BR /> <BR /> #Switch B (should be backup)<BR /> create vrrp vlan SR_A_userplane vrid 216<BR /> configure vrrp vlan SR_A_userplane vrid 216 advertisement-interval 100 milliseconds<BR /> configure vrrp vlan SR_A_userplane vrid 216 priority 253<BR /> configure vrrp vlan SR_A_userplane vrid 216 dont-preempt<BR /> configure vrrp vlan SR_A_userplane vrid 216 add 172.19.136.67<BR /> enable vrrp vlan SR_A_userplane vrid 216<BR /> <BR /> the VLAN SR_A is configured on port 13 and the connection towards our customer routers are like the attached.<BR /> <BR /> <P class="fancybox-image"><span class="lia-inline-image-display-wrapper" image-alt="e4d4edabd5a64d19b393c4268bbf587b_RackMultipart20141015-18744-1pmnri7-connectivity_inline.png"><img src="https://community.extremenetworks.com/t5/image/serverpage/image-id/2788i04D122028D69C1AC/image-size/large?v=v2&amp;px=999" role="button" title="e4d4edabd5a64d19b393c4268bbf587b_RackMultipart20141015-18744-1pmnri7-connectivity_inline.png" alt="e4d4edabd5a64d19b393c4268bbf587b_RackMultipart20141015-18744-1pmnri7-connectivity_inline.png" /></span></P><BR /> Within redundancy tests we face the following scenario:<BR /> 1- the problem is when router A restarts router B becomes master and handles the traffic and when side A comes into service it becomes backup and no pre-emption is done.<BR /> <BR /> 2-when we try to disconnect cable (to simulate cable fault) connecting exterme router side A to customer router side A , exterme side A becomes in INIT state and B become master. when the cable was returned again side A becomes master again and pre-emption happened which means double failover that not required.<BR /> <BR /> the software release of the switches is summitX-15.1.3.4-patch1-2<BR /> <BR /> is it normal behaviour ? and if there is metigation in order not to have such behaviour can you <BR /> share it?<BR /> <BR /> thanks<BR /> ayman<BR /> Thu, 16 Oct 2014 03:40:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/vrrp-don-t-pre-empt-is-not-working-as-expected/m-p/48418#M12657 ayman_moussa 2014-10-16T03:40:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/vrrp-don-t-pre-empt-is-not-working-as-expected/m-p/48419#M12658 What about the config:<BR /> configure vrrp vlan SR_A_userplane vrid 216 priority 254<BR /> <BR /> Doesnt that make side A priority? Wed, 20 May 2015 03:03:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/vrrp-don-t-pre-empt-is-not-working-as-expected/m-p/48419#M12658 Andre_Scott 2015-05-20T03:03:00Z