I have a small test network where i have two 3750's, as routers. In the middle is a linux router. I send traffic from say R1.
If the linux router puts the interface DOWN (IFDOWN)between itself and R1, the ARP entry of the LxRTR remains in R1's arp cache, however, if the same command is done on Lx RTR on the interface to R2, R2 correctly detects the link DOWN and removes the entry from ARP cache.
Any ideas why this occurs only on one side?
PS. They have the same IOS image 12.2.40SE IPSVCS