来自 BGP 和 OSPF 的路由未安装在路由表中
问题
BGP 和 OSPF 路由的路由表条目在路由表中丢失。例如
frr# show ip bgp
BGP table version is 0, local router ID is 10.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 10.0.1.0/24 10.1.1.2 1 0 65511 ?
*> 10.1.1.0/24 10.1.1.2 1 0 65511 ?
*> 10.3.3.3/32 10.1.1.2 1 0 65511 ?
Total number of prefixes 3
frr# show ip route
frr# exit
cumulus@switch:~$ ip route show
default via 10.0.1.2 dev eth0
10.0.1.0/24 dev eth0 proto kernel scope link src 10.0.1.208
10.1.1.0/24 dev swp3 proto kernel scope link src 10.1.1.1
10.2.2.0/24 dev swp4 proto kernel scope link src 10.2.2.2
环境
- Cumulus Linux，所有版本
原因
Zebra 守护进程未运行。Zebra 守护进程不会将从路由协议学习到的路由安装到路由表中。
解决方案
编辑
/etc/frr/daemons并将zebra关键字设置为 yes。cumulus@switch:~$ sudo vi /etc/frr/daemons ---------------- zebra=no [change to yes] bgpd=yes ospfd=yes ----------------重启 FRRouting。
cumulus@switch:~$ sudo systemctl restart frr ... ..... frr# show ip route Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF, I - IS-IS, B - BGP, A - Babel, > - selected route, * - FIB route K>* 0.0.0.0/0 via 10.0.1.2, eth0 C>* 10.0.1.0/24 is directly connected, eth0 C>* 10.1.1.0/24 is directly connected, swp3 B>* 10.3.3.3/32 [20/1] via 10.1.1.2, swp3, 00:00:08 C>* 10.4.4.4/32 is directly connected, lo C>* 127.0.0.0/8 is directly connected, lo退出 FRR，然后在 Cumulus Linux 中使用
ip route show进行验证。frr# exit cumulus@switch:~$ ip route show default via 10.0.1.2 dev eth0 10.0.1.0/24 dev eth0 proto kernel scope link src 10.0.1.208 10.1.1.0/24 dev swp3 proto kernel scope link src 10.1.1.1 10.2.2.0/24 dev swp4 proto kernel scope link src 10.2.2.2 10.3.3.3 via 10.1.1.2 dev swp3 proto zebra metric 20