Cisco 3700 and 2811 connecting via crossed cable

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Jul 16th, 2009
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I have a two routers connected via a crossed cable (3700 and 2800) the configured with /30 ip addresses. this setup worked till yesterday then stopped. What could be the issue:

1. show cdp neigbors is showing the other router on the connecting interface

2. show arp is not returning any entries for the connecting device.

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dabels Thu, 07/16/2009 - 07:02
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so is there cdp nei on both sides (the 3700 and the 2800 or just on one side?) also what about arp entries on one side ? sh interface command output would help... what did the logs show?

njorosam Fri, 07/17/2009 - 01:16
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There's CDP neighor is showing on both sides. show int status does not reveal anything (no errors, no int resets, the intfaces is up and line protocol is up too) . Only one thing i got is that router crashed prior to that happening. Once i have downloaded the crash-info, i will share with you.

p.devalck Mon, 07/20/2009 - 02:50
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Any possibility that the IP settings of the interfaces were lost at one side during the restart (IP settings not saved in nvram before the crash ?)


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