I use static float route to use backup interface,and destination are two net: 126.96.36.199,188.8.131.52 but when master interface serial down ,only the net 184.108.40.206 next hop chage to backup interface and net 220.127.116.11 still use default next hop (the master interface,even it is down),why? it is so strange!
config is below:
ip address 18.104.22.168 255.255.255.252
ip access-group 144 in
ip access-group 144 out
ip route 22.214.171.124 255.255.224.0 126.96.36.199 80
ip route 188.8.131.52 255.255.255.0 184.108.40.206
ip route 220.127.116.11 255.255.224.0 18.104.22.168 80
ip route 22.214.171.124 255.255.255.0 126.96.36.199
#show ip interface brief
Serial5/0 188.8.131.52 YES NVRAM down down
#show ip route
S 184.108.40.206/19 [80/0] via 220.127.116.11
S 18.104.22.168/19 [1/0] via 22.214.171.124
IOS (tm) 7200 Software (C7200-JS-M), Version 12.1(20)E, EARLY DEPLOYMENT RELEASE
The strange happened in all my wan interface! and I have another 7206 with different IOS at work online too,and even have the trouble!!!
second:same router and same config, i use eigrp too, but when i use no auto-summary config why still a summary address in route table???
It is not so strange. Your static route only specifies a next hop. As long as the next hop for that static route (in this case 126.96.36.199) is resolvable , either via a directly connected route or via any other route, the static route will remain in the routing table.
If you want to make sure that the static route is removed after the interface goes down, use the following syntax:
ip route 188.8.131.52 255.255.255.0 se5/0
ip route 184.108.40.206 255.255.255.0 se5/0
2) The summary installed by Eigrp in the routing table is not due to auto summarization (not on majornet boundary) but to manual summarization. Check your configuration for the following statement on one of the interfaces on this router:
ip summary-address eigrp 1 220.127.116.11 255.255.128.0 5
Hope this helps,
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