注意： 同一網段中virtual_router_id的值不能重複，否則會出錯，相關錯誤資訊如下。
Keepalived_vrrp[27120]: ip address associated with VRID not present in received packet :
one or more VIP associated with VRID mismatch actual MASTER advert
bogus VRRP packet received on eth1 !!!
receive an invalid ip number count associated with VRID!
VRRP_Instance(xxx) ignoring received advertisment...
問題排查：
通過tcpdump抓包并過濾vrid，可以發現同一個vrid對應的主機，進而判斷是否這些主機隸屬同一個叢集
tcpdump -nn -i any net 224.0.0.0/8 如：
[root@CN-DJI-PLB1 ~]# tcpdump -nn -i any net 10.104.15.0/24 |grep vrid
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked), capture size 65535 bytes
13:50:46.778532 IP 10.104.15.33 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 100, authtype simple, intvl 1s, length 20
13:50:47.778735 IP 10.104.15.61 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 95, authtype simple, intvl 1s, length 20
13:50:47.778748 IP 10.104.15.33 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 100, authtype simple, intvl 1s, length 20
13:50:48.778899 IP 10.104.15.63 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 98, authtype simple, intvl 1s, length 20
13:50:49.779096 IP 10.104.15.61 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 95, authtype simple, intvl 1s, length 20
13:50:50.779518 IP 10.104.15.33 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 100, authtype simple, intvl 1s, length 20
13:50:51.779755 IP 10.104.15.33 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 100, authtype simple, intvl 1s, length 20
13:51:01.783737 IP 10.104.15.61 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 95, authtype simple, intvl 1s, length 20
13:51:02.784253 IP 10.104.15.63 > 224.0.0.18: VRRPv2, Advertisement, vrid 55, prio 98, authtype simple, intvl 1s, length 20
人們永遠沒有足夠的時間把它做好，但永遠有足夠的時間重新來過。
可是，因為并不是總有機會重做一遍，你必須做得更好，換句話說，
人們永遠沒有足夠的時間去考慮到底是不是想要它，但永遠有足夠的時間去為之後悔。
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