L2 etherchannel protocol mode

From: Adhu Ajit (adhu_ajit@yahoo.com)
Date: Thu Nov 09 2006 - 22:44:38 ART


Folks, I have a L2 etherchannel link between 2 switches. Both sides are configured with "ON" type. The etherchannel establishes and I can see VTP status messages getting exchanged for any VLAN changes. I established this EC with the command "channel-group 1 mode on" on the interfaces.
   
  I wanted to try different modes and I ran into a probem. Check out the below logs:
   
  SW1(config-if)#
  2w2d: %EC-5-ERRPROT2: Command rejected: the interface Fa0/23 is already part of a channel with a different type of protocol enabled SW1(config-if)#channel-protocol pagp SW1(config-if)#
  2w2d: %EC-5-ERRPROT2: Command rejected: the interface Fa0/23 is already part of a channel with a different type of protocol enabled SW1(config-if)#^Z SW1#show e
  2w2d: %SYS-5-CONFIG_I: Configured from console by consolether SW1#show etherchannel port
  Channel-group listing:
  -----------------------
  Group: 1
  ----------
  Ports in the group:
  -------------------
  Port: Fa0/23
  ------------
  Port state = Up Mstr In-Bndl
  Channel group = 1 Mode = On/FEC Gcchange = -
  Port-channel = Po1 GC = - Pseudo port-channel = Po1
  Port index = 0 Load = 0x00 Protocol = -
  Age of the port in the current state: 00d:00h:27m:12s
  Port: Fa0/24
  ------------
  Port state = Up Mstr In-Bndl
  Channel group = 1 Mode = On/FEC Gcchange = -
  Port index = 0 Load = 0x00 Protocol = -
  
  Age of the port in the current state: 00d:00h:22m:40s
  
  
  SW1#
  SW1#
   
  The porotcol mode shows "-" ??!!! ... and I cant explicitly set it to Pagp or Lacp. Any comments ?
   
  Thanks in advance.

 
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