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The %This platform allows a maximum of 1 TX monitor interface(s) error message is received during SPAN configuration on a Cisco Catalyst switch

Core issue

This issue is due to the hardware limitations of Cisco Catalyst switches. Traffic monitoring in a SPAN session has these restrictions:

  1.  You can monitor incoming traffic on a series or range of ports and VLANs.

  2.  You can monitor outgoing traffic on a single port.

  3.  You cannot monitor outgoing traffic on multiple ports.

  4.  You cannot monitor outgoing traffic on VLANs.

Cisco bug ID CSCef76791 addresses the addition of more egress (Tx) direction SPAN sessions.

Resolution

Native Cisco IOS  allows only one Tx direction source interface to be monitored. However, it is allowed to monitor ingress (Rx) traffic from more interfaces.

For more information about SPAN restrictions on the Cisco Catalyst 3550 switch, refer to  Configuring SPAN and RSPAN.

For more information about SPAN restrictions on the Cisco Catalyst 6500 switch, refer to  Configuring Local SPAN, Remote SPAN (RSPAN), and Encapsulated RSPAN.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 05:09 PM
Updated by:
 
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