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

[Eric Osborne]

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Does the rxload on the other side mirror the txload?  Not like we've never had
a counters bug before..:)


eric

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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