RE: Ether-channel and port-channel

From: Mike Williams (ccie2be@swbell.net)
Date: Wed Jul 09 2003 - 09:40:51 GMT-3


As soon as you enter the "channel-group 1 mode on" command on the first
interface, the switch will automatically create interface Port-channel1.
Also you can save a lot of typing if you simply go to the 2 interfaces
(in your case Fast0/23 and Fast0/24) and enter "channel-group 1 mode
on", then do all trunk and VLAN config on the port-channel interface.

IIRC, 'channel-group 1' isn't enough. You will get an 'incomplete
command' as you need to at least specify it's mode (auto, on, etc).

Mike W.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Rivalino YMT.
Sent: Wednesday, July 09, 2003 2:03 AM
To: ccielab@groupstudy.com
Subject: Ether-channel and port-channel

Hi groups,

I found confusing configuration in lab workbook. The configuration is
below.

The task:
Create Ether-channel on fa0/23 - fa0/24, as trunk with encapsulation
isl. Allowed vlan is 1,2,3.

Answer:
interface fa0/23
 switchport mode trunk
 switchport trunk encapsulation isl
 switchport trunk allowed vlan 1,2,3
 no ip address
 channel-group 1
!
interface fa0/24
 switchport mode trunk
 switchport trunk encapsulation isl
 switcport trunk allowed vlan 1,2,3
 no ip address
 channel-group 1
!
interface port-channel1
 switchport mode trunk
 switchport trunk encapsulation isl
 switchport trunk allowed vlan 1,2,3
 no ip address

My question:
Should we create interface port-channel in this case? AFAIK,
port-channel is needed if we want to create layer 3 interface. If we
want to create ether-channel, we just add 'channel-group' command on
interfaces. There is no need create interface port-channel.

Thank you for your response,
Rivel



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