[c-nsp] Receiving out of order packets in SPAN session on Catalyst 3750X

Phil Mayers p.mayers at imperial.ac.uk
Thu Mar 19 08:33:11 EDT 2015


On 19/03/15 12:24, Steve Teti wrote:
> I have a SPAN session running on a stack of 2 C3750X-24T-L switches. The
> session is configured to monitor RX only on about a dozen ports.  On the
> server that's capturing data from the SPAN I'm occasionally seeing
> out-of-order packets.  In a conversation between two monitored ports I'm
> sometimes seeing the reply before the initial request.  Anyone else
> experienced a similar issue on these switches?  The TAC engineer I spoke
> to said he's never seen that on these switches.

What sort of traffic levels are we talking about here? Substantial or 
slight, in comparison to platform capacity? What about other traffic on 
the switch?

How far apart in wall-clock time were the request/response?

Any QoS configured?


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