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Author How static routes come in & out of the routing table
Thomas Kuborn

2002-09-30, 9:29 am

Dear ng,

I always thought that static routes with a logical next-hop (IP address for
example) were NOT removed from the routing table when the interface
associated with the IP subnet failed. However, I constated this is not true.

Has it always been so ?

example :
interface ethernet 0 on RTR-A has ip address 192.168.100.1/24 while
interface ethernet 0 on RTR-B has ip address 192.168.100.2/24

on RTR-A
The follwowing route will be removed from the routing table when the
ethernet 0 interface line protocol goes down
ip route 192.168.200.64 255.255.255.192 ethernet0

I thought (but this is not true in latter versions at least, since when ?)
that the following route would not be removed from the routing table when
interface ethernet0 would go down
ip route 192.168.200.64 255.255.255.192 192.168.102

anyone can comment on this ?

Thomas


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