Routing problem to single ip address

Unanswered Question
Aug 27th, 2009

Got a very strange routing problem. Had a fault come in that a voice server was inreachable ( A traceroute seemed to see as the second hop and all subsequent hops as well! This address is the exit interface of a 3845 router (first hop was the WAN address of this router). is forwarded to a firewall on the directly connected subnet

Funny thing is that trace to the IP address routes ok and tracing to on the 3845 gives it's own ip address as the first hop!

Very odd and am currently suspecting an IOS fault. Change control is a nightmare so am exhausting all other options first.

3845#sh ip arp | in

Internet 203 0023.336b.0000 ARPA GigabitEthernet0/1.16

3845#sh ip route

Routing entry for

Known via "static", distance 1, metric 0

Redistributing via eigrp 110

Advertised by eigrp 110

Routing Descriptor Blocks:


Route metric is 0, traffic share count is 1


Type escape sequence to abort.

Tracing the route to

1 0 msec 0 msec 4 msec

2 * * *

3 * * *


I have this problem too.
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Richard Burts Thu, 08/27/2009 - 07:26


The show ip route indicates that the destination is learned via static route. Can you post the route from the config? Can you also post the output of show cdp neighbor detail?




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