Technical Tip: FortiExtender does not respond to VRRP advertisments from 3rd Party Router

This article describes how to resolve an issue where FortiExtender does not respond to VRRP advertisements from 3rd Party Router.

Running tcpdump on the FortiExtender confirms that VRRP init packets arrive but the  FortiExtender does not seem to respond to the VRRP advertisements.

#Test_EXT # execute tcpdump host 10.0.0.
tcpdump: enabling -nn option
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
08:55:50.470656 IP 10.0.0.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 200, authtype none, intvl 1s, length 20
08:55:51.350848 IP 10.0.0.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 200, authtype none, intvl 1s, length 20
08:55:52.351048 IP 10.0.0.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 200, authtype none, intvl 1s, length 20
08:55:53.271204 IP 10.0.0.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 200, authtype none, intvl 1s, length 20
08:55:54.183431 IP 10.0.0.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 200, authtype none, intvl 1s, length 20
08:55:55.003586 IP 10.0.0.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 200, authtype none, intvl 1s, length 20
^C
6 packets captured

No information is seen under the VRRP info log :

#Test_EXT # get router info vrr
##Test_EXT#

FortiExtender.