Switch caching host routes?

mfieldhousemfieldhouse Member Posts: 41 ■■□□□□□□□□
Hi, we have a production switch which somehow has a routing table with host routes in it.
It is a WS-C3550-24-PWR with IOS 'c3550-ipbasek9-mz.122-50.SE1.bin'

'ip routing' is not present in the config, no routing protocols are running or static routes configured. However, when doing a 'show ip route', the following is displayed:

Host Gateway Last Use Total Uses Interface 0:00 73738 Vlan1 0:00 1138 Vlan1 0:00 812685 Vlan1

This is causing a problem as the route to '', our network monitoring system, is outdated as that gateway no longer exists.

Does anyone know how to clear this route table and provide any information on how it was formed as I've never seen this before.



  • mfieldhousemfieldhouse Member Posts: 41 ■■□□□□□□□□
    Fixed! The routes which were being shown were actually ICMP redirects. They can be cleared using 'clear ip redirect'.
  • dtlokeedtlokee Member Posts: 2,378 ■■■■□□□□□□
    You can clear them but they may come back if there were there before, the real culprit is going to to be the routing table of the defualt gateway for that switch.
    The only easy day was yesterday!
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