路由器(主)---交换机---(备)路由器,两个路由器之间运行vrrp虚拟网关,心跳报文通过交换机转发
现场模拟主路由器vrrp接口down的场景,备路由器vrrp顺利升主。后续原主路由器接口恢复后,发现前30s,两侧路由器的vrrp状态都为主,30s后状态才正常。
1、查看配置vrrp 配置未配置抢占延迟,且配置抢占延迟的情况,不会是双主。
2、怀疑前30s,两侧路由器vrrp报文的交互存在异常,报文只过中间交换机,30s的时间和交换机stp切换时间基本吻合。
经过确认,交换机侧对接路由器的接口开启了stp。交换机接口up后从discarding到forwarding切换需要30s,30s内路由器没收到对端的报文。
%Jan 1 09:13:34:086 2021 H3C IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet0/0/0 changed to up.
09:14:04:703 2021 H3C VRRP4/6/VRRP_STATUS_CHANGE: The status of IPv4 virtual router 2 (configured on GigabitEthernet0/0/0) changed from Master to Backup: VRRP packet received.
交换机:
%Jan 1 01:15:57:931 2013 TestDevice IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/2 changed to up.
[TestDevice-GigabitEthernet1/0/2]dis stp brief
MST ID Port Role STP State Protection
0 GigabitEthernet1/0/1 DESI FORWARDING NONE
0 GigabitEthernet1/0/2 DESI DISCARDING NONE
%Jan 1 01:16:28:420 2013 TestDevice STP/6/STP_DETECTED_TC: Instance 0's port GigabitEthernet1/0/2 detected a topology change.
dis stp brief
MST ID Port Role STP State Protection
0 GigabitEthernet1/0/1 DESI FORWARDING NONE
0 GigabitEthernet1/0/2 DESI FORWARDING NONE
交换机侧对接路由器的接口关闭stp
该案例暂时没有网友评论
✖
案例意见反馈
亲~登录后才可以操作哦!
确定你的邮箱还未认证,请认证邮箱或绑定手机后进行当前操作