We have 4x1G Etherchannel on trunk and for troubleshooting i want to monitor one of its physical port.

Can i monitor using SPAN port mirror and configure its physical port for source SPAN?

Group: 99
        Port-channels in the group:

Port-channel: Po99    (Primary Aggregator)


Age of the Port-channel   = 8d:08h:08m:05s
Logical slot/port   = 12/99          Number of ports = 4
HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =   LACP
Port security       = Disabled

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits
  0     00     Gi2/0/1  Active             0
  0     00     Gi2/0/2  Active             0
  0     00     Gi2/0/3  Active             0
  0     00     Gi2/0/4  Active             0

Time since last port bundled:    8d:08h:07m:53s    Gi2/0/4

1 Answer 1


That is what I've found:

Can You Configure SPAN on an EtherChannel Port?

An EtherChannel does not form if one of the ports in the bundle is a SPAN destination port. If you try to configure SPAN in this situation, the switch tells you: Channel port cannot be a Monitor Destination Port Failed to configure span feature You can use a port in an EtherChannel bundle as a SPAN source port.

Source: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/10570-41.html#anc63

  • i read that doc and its confusing that is why i post question. So answer is YES can i configure as a source????
    – Satish
    Commented Jun 15, 2016 at 17:28
  • Yes. You can do it as a source port.
    – reybanger
    Commented Jun 15, 2016 at 17:39

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