문서의 이전 판입니다!
KeepAlived VRID mismatch [Dropping received VRRP packet]
KeepAlived VRID mismatch
VRID : virtual_router_id
증상
message log에 아래 로그가 출력되기 시작함.
/var/log/message
Keepalived_vrrp[xxxx]: ip address associated with VRID not present in received packet : 192.168.17.100 Keepalived_vrrp[xxxx]: one or more VIP associated with VRID mismatch actual MASTER advert Keepalived_vrrp[xxxx]: bogus VRRP packet received on eth0 !!! Keepalived_vrrp[xxxx]: VRRP_Instance(VI_1) Dropping received VRRP packet...
원인
동일한 VRID 를 사용하는 KeepAlived 가 같은 네트워크에 존재하고 있어서 발생
(VIP 가 다르고 VRID 가 동일한 상황)
ex> VIP 192.168.17.100 → VRID 20
VIP 192.168.17.150 -> VRID 20
확인방법
KeepAlived 가 동작하는 서버에서 tcpdump 를 이용해서 vrid 확인
# tcpdump -i eth0 host 224.0.0.18 10:59:10.697847 IP 192.168.17.100 > vrrp.mcast.net: VRRPv2, Advertisement, vrid 20, prio 100, authtype simple, intvl 1s, length 20 10:59:10.698571 IP 192.168.17.150 > vrrp.mcast.net: VRRPv2, Advertisement, vrid 20, prio 100, authtype simple, intvl 1s, length 20
IP Multicast address참고 [https://en.wikipedia.org/wiki/Multicast_address#IPv4]
224.0.0.18Virtual Router Redundancy Protocol (VRRP)
해결방법
keepalived.conf 내에 vrid 값을 중복되지 않는 값으로 변경 후 KeepAlived 데몬 restart
''virtual_router_id 21''
참조링크
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