[c-nsp] Etherchannel Question

[Peter Rathlev]

On Mon, 2011-07-11 at 20:26 +0200, Peter Rathlev wrote:
> > find out, what does 'stand-alone' mean and why would these ports say
> > that? Can anyone here explain why?
> 
> The "I" means "independent" here. It means that you configured an
> etherchannel protocol on this devices, but the neighboring device is
> running the same protocol. What's the interface configuration on this
> and the neighboring device?

... and an independent port acts like it's not an etherchannel member by
the way. Forgot that part. So if you have a L2 etherchannel running STP
it would normally look like this:

interface GigabitEthernet1/1
 switchport
 switchport access vlan 2
 switchport mode access
 channel-group 1 mode active
!
interface GigabitEthernet1/2
 switchport
 switchport access vlan 2
 switchport mode access
 channel-group 1 mode active
!
interface Port-channel1
 switchport
 switchport access vlan 2
 switchport mode access
!

With both ports "up" and LACP active ("P"):

   Switch# show spanning-tree vlan 2
   ...
   Po1                 Desg FWD 20000     128.1665 P2p 

And if both ports were independent:

   Switch# show spanning-tree vlan 2
   ...
   Gi1/1               Desg FWD 10000     128.1665 P2p 
   Gi1/2               Desg FWD 10000     128.1665 P2p 

-- 
Peter