Configure multiple span sessions (port monitoring) on Catalyst 6500/6000 switches running Catalyst OS system software.

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Resolution

You can have multiple Switched Port Analyzer (SPAN) sessions configured at the same time. But there are certain restrictions while configuring additional SPAN sessions.

For more information on SPAN and Remote SPAN (RSPAN) session limits, refer to these documents:

• The SPAN and RSPAN Session Limits section of Configuring SPAN and RSPAN.   
• The SPAN Configuration Guidelines section of the document.

For multiple SPAN sessions, add the create keyword at the end when configuring the additional session, as shown:

For configuring the first SPAN session:

6509> (enable) set span 3/1 2/1

Destination      Port 2/1
Admin Source     Port 3/1
Oper Source      Port 3/1
Direction        transmit/receive
Incoming Packets disabled
Learning         enabled
Multicast        enabled
Filter           -
Status           active

For configuring the additional SPAN session:

6509> (enable) set span 3/5 3/10 create

Destination      Port 3/10
Admin Source     Port 3/5
Oper Source      Port 3/5
Direction        transmit/receive
Incoming Packets disabled
Learning         enabled
Multicast        enabled
Filter           -
Status           active

To verify the multiple SPAN sessions:

6509> (enable) show span

Destination      Port 2/1
Admin Source     Port 3/1
Oper Source      Port 3/1
Direction        transmit/receive
Incoming Packets disabled
Learning         enabled
Multicast        enabled
Filter           -
Status           active
-----------------------------------------------------------------------
Destination      Port 3/10
Admin Source     Port 3/5
Oper Source      Port 3/5
Direction        transmit/receive
Incoming Packets disabled
Learning         enabled
Multicast        enabled
Filter           -
Status           active

Total local span sessions  2