Michael Conway wrote:
In the past when I have configured an LACP link between a server and a switch I could see the connection speed on the virtual adapter that is created when teaming on the server. How do I check the speed with 2 switches connected via a LACP Trunk?
In darren's example he creates the port-channel with the encapsulation dot1q then also configures each interface with dot1q encapsulation that will be in the port-channel. Is there a reason for this? Seems double redundant? Is this for failover?
The reson for that is simple - in a Cisco encironment, the individual interfaces won't join a port-channel group unless they are all meeting certain criteria - amongst those criteria are a requirement for the ports to be in the same mode as the port-channel interface. Hence, the same mode on the port-channel group and the individual ports.
Think of the individuaal ports as a sub-port of the port channel, if it helps. The configuration which holds on the port-channel interface flows down to the individual ports, something like this (I suck at ASCII art, so I hope this comes out OK)
|------------interface 1
| (inhereted configuration)
|
PO interface--|
|
|------------interface 2
(inhereted configuration)
The difference is that the configuration doesn't automatically "inheret" to the individual ports - you have to manually configure them to match,
Also, all ports in a port-channel have to be the same speed/duplex or they won't join the group either.
As far as checking the speed of the amaglamated interface - you can look at the port-channel interface itself- show interface po1, for example. This will show you the total throughput rate of the port channel across all its members.
Cheers.
