[c-nsp] 6500 Monitor Port limitations

[Tim Stevenson]

Some of the SPAN session limitations are architectural and some are just 
software.

First, there is a big diff between a span source & a span destination - the 
"64" number you see refers to span destinations, not sources. Also, there 
is a big diff between rx direction & tx direction span in terms of the 
internal implementation.

There are also diffs between the catOS & IOS in terms of implementation & 
behavior. There are also some recent changes to the code that can help you 
out here and more on the horizon for IOS (eg, more tx direction sessions). 
Eg, in CatOS 8.4 we've added multiple span destination ports per session, 
which you can combine with a trunk/allowed vlan config on the span dest 
ports to "virtually" span individual VLANs to individual span dest ports 
using a single span session. We can do this in recent IOS as well.

But, bottom line, the documentation for your s/w release should outline 
very clearly what is possible.

Tim

At 07:26 AM 2/3/2005, Voll, Scott uttered:
>Same question.  I have a Sup 720 / MSFC 3 and I can't get more then 3
>monitor sessions before I get " % Local Session limit has been
>exceeded".  I also could use more then 3.
>
>Scott
>
>
>-----Original Message-----
>From: cisco-nsp-bounces at puck.nether.net
>[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Dan Benson
>Sent: Thursday, February 03, 2005 7:17 AM
>To: cisco-nsp at puck.nether.net; nathan at broadvoice.com
>Subject: [c-nsp] 6500 Monitor Port limitations
>
>I have a few 6509's in the field, mostly running catOS and a few running
>
>IOS, with port monitor sessions configured.  I am curious if there is
>any way to have more then two sessions configured at one time.  Is this
>a limitation of the SUP or of the chassie architecture?  My
>configurations are sup1's with MSFC1's, running monitoring on GIG and FE
>
>ports with the destination port on a GIG.  According to the link below I
>
>should be able to have 64 in IOS, but when I try, I get, "% Local
>Session limit has been exceeded."   Thanks for the help in advance..
>//db
>
>
>http://www.cisco.com/warp/public/473/41.html#topic6
>
>
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Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Catalyst 6500
Cisco Systems, http://www.cisco.com
IP Phone: 408-526-6759
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