[c-nsp] SPAN on 6500

[Tim Stevenson]

Arg, I've done it again. Don't bother clicking, this link is internal 
to cisco. Sorry about that.

The basic information you need though is in the user docs:

http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_0/nx-os/system_management/configuration/guide/sm_span.html#wp1184503

Hope that helps, sorry for the confusion.
Tim


At 08:42 AM 1/13/2011, Tim Stevenson muttered:
>Hi Chuck,
>You're correct, if you first configure the span dest as a .1q trunk, 
>the SPANned traffic will go out vlan tagged (regardless of whether 
>the original traffic actually had a vlan tag or not).
>
>You might want to check this (old but still relevant) doc on cco:
>http://bock-bock.cisco.com/~tstevens/White_Papers/virtual-span/virtual-span.pdf
>
>Hope that helps,
>Tim
>
>
>
>At 08:16 AM 1/13/2011, Church, Charles muttered:
>
>>All,
>>
>>
>>
>>                 I'm running into some issues with SPAN session limitations
>>on 6500 (SXI on a VSS pair).  After reading this doc:
>>
>><http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configu>http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configu
>>ration/guide/span.html
>>
>>
>>
>>I'm lead to believe that if I make the destination interface a trunk, a span
>>source of say VLANs 10 and 20 will leave the destination port with those
>>VLAN tags intact.  This appears to match the 'encapsulation replicate' that
>>is present on the 3560s.  My end goal is to use 2 3560 switches off of the
>>6500s to distribute SPAN sessions to 4 separate entities.  Switch A will get
>>a SPAN session off of the 6500 consisting of VLAN groups X and Y.  Switch B
>>will get a SPAN session off of the 6500 consisting of VLAN groups X and Z.
>>Switch A will span VLAN group X to a certain destination port, and group Y
>>to another.  Switch B will do a similar thing with VLAN groups X and Z.  I'm
>>assuming normal local SPAN.  I think the relies on the SPAN off of the 6500
>>to keep the VLAN tags intact.  Can anyone confirm if my assumption is
>>correct?
>>
>>
>>
>>Thanks,
>>
>>
>>
>>Chuck
>>
>>
>>
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>
>
>
>
>Tim Stevenson, tstevens at cisco.com
>Routing & Switching CCIE #5561
>Distinguished Technical Marketing Engineer, Cisco Nexus 7000
>Cisco - http://www.cisco.com
>IP Phone: 408-526-6759
>********************************************************
>The contents of this message may be *Cisco Confidential*
>and are intended for the specified recipients only.
>




Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
********************************************************
The contents of this message may be *Cisco Confidential*
and are intended for the specified recipients only.