[c-nsp] Ethernet Freezeup

[Ed Ravin]

On Mon, Apr 07, 2008 at 10:10:38AM -0400, Ed Ravin wrote:
The story so far:
On Sat, Jul 15, 2006 at 05:23:20PM -0400, Ed Ravin wrote:
> A few times on this list, people have discussed how a Cisco 1700 series
> router can suddenly "freeze up" on its main Ethernet interface.  The
> problem as I've observed it hits routers that have a single Ethernet
> interface (and no other interfaces in use).  The symptom is that the router
> no longer receives traffic on the Ethernet - it still transmits ARP requests
> and retries of routing protocol packets, but nothing is received.  Getting to
> the console of the router and issuing "clear int faste0" always fixes the
> problem.

...

> 4 weeks ago, I also upgraded the 7204 to IOS 12.3(24a).  No problems
> since.
> 
> I don't know whether the bug is quenched with the new IOS - this is
> definitely an improvement, but we've had similar quiet periods before.
> If I don't see it for another 2-3 months, then I might declare victory.

And sure enough, it happened again today with the 7204.  Obviously
the IOS upgrade was not the answer.

Can anyone suggest some commands to run before the "clear int FastE0/0"
on the 7204 that might shed some light on what's going on?  It has
to get spooled out through a 9600 bps serial port so I don't want to
run anything with a lot of output.