[c-nsp] cef load-sharing per-packet bizzare behavior

[Rodney Dunn]

Does the downstream routers show the same unequal
load inbound?

Is that the only prefix being forwarded over
the links?


On Wed, Sep 15, 2004 at 12:34:26PM -0400, Andy Dills wrote:
> 
> We just moved a 2xT1 customer over to a 7513 as part of some network
> consolidation.
> 
> We're doing per-packet CEF for this customer. (We've done per-packet CEF
> for half a decade now, so I'm well aware of the simple gotchas.)
> 
> I've confirmed per-packet CEF is enabled on the interfaces, as well as
> dCEF.
> 
> I've even turned on 'ip cef accounting load-balance-hash', and watched the
> output of 'sh ip cef <their loopback IP> internal", and watched the packet
> hashes increase pretty evenly. From what I understand of debugging CEF,
> this indicates that at the CEF level, they are being switched properly.
> 
> Yet, when I watch the txload on the interfaces, one of the T1s seems to
> get almost exactly double the txload of the other T1 interface. The
> relationship between these numbers seems too coincidental to me.
> 
> Running 12.2(16).
> 
> Does anybody have any ideas or suggestions?
> 
> Thanks,
> Andy
> 
> ---
> Andy Dills
> Xecunet, Inc.
> www.xecu.net
> 301-682-9972
> ---
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