[c-nsp] WS-X6416-GBIC input errors

[Jon Lewis]

I did go ahead and turn off tag-switching on one of these interfaces last 
night, and that did stop the input errors.  This makes me even more 
suspicious that the input errors are really just tagged packets being 
counted as errors, though they're still being forwarded.

On Tue, 13 Jun 2006, Jon Lewis wrote:

> On a pair of 6509s with sup720-3bxl and WS-X6416-GBIC cards, I'm seeing 
> roughly 10% input errors (of no specific type) on GE interfaces going to the 
> GE ports on a 3550-24.  These are L3 interfaces doing tag-switching to carry 
> MPLS VPN traffic.  The odd thing is, I'm not noticing any packet loss, so I 
> have to wonder if this is a counter bug/hardware limitation similar to how a 
> 2900XL will count all tagged packets as errors/giants?
>
>     4056215423 packets input, 1402231640515 bytes, 0 no buffer
>     Received 7233212 broadcasts (0 IP multicast)
>     0 runts, 0 giants, 18 throttles
>     390765368 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
>     0 watchdog, 0 multicast, 0 pause input
>     0 input packets with dribble condition detected
>
> The 3550 end isn't seeing any errors.  These are the only/first WS-X6416-GBIC 
> GE interfaces I've done tag-switching on.  I may turn off tag-switching on 
> one of them later tonight to see if that stops the input errors.  6509 
> software version is 12.2(18)SXD7.

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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