From: Ian Blaney (ian.blaney@gmail.com)
Date: Fri Nov 10 2006 - 08:59:54 ART
Adhu
Try deleteing the interface Port-channel and removing the channel-group
using the interface range command.
channel-group 1 mode on means you are hardcoding the interface to be part of
an etherchannel. This has the effect of disabling any dynamic protocols like
PAgP or LACP. This is the reason you see - under protocol in the show
etherchannel summary command since it did not use any protocol to negotiate
the etherchannel.
Remember the following combinations will bring up the channel
SW1 SW2 Protocol
on on none
dynamic dynamic PAgP
dynamic auto PAgP
active active LACP
active passive LACP
The following will never bring the channel as both sides are passively
listening for PAgP or LACP packets which will never be received.
SW1 SW2 Protocol
auto auto PAgP
passive passive LACP
On 11/10/06, Adhu Ajit <adhu_ajit@yahoo.com> wrote:
>
> 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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