From: Donny MATEO (donny.mateo@sg.ca-indosuez.com)
Date: Sun Nov 16 2003 - 22:49:50 GMT-3
The difference as it says is in the sequence of configuring it.
For L3 port-channel, you create it by first creating the logical
port-channel interface using interface port-channel command. Then assign
individual physical interface into the port-channel by using channel-group
x command.
For L3 port-channel, you do the opposite. You assign the physical
interface into a channel by using the command channel-group. This will
automatically create the logical port-channel interface.
When to use either ? Well L3 port-channel is used for L3 interface (
router interface => in 3550 you can get this by "no switchport" command)
and L3 port-channel is for L2 interface.
Donny
"Edward Agostinho" <edward@ceg.co.za>
Sent by: nobody@groupstudy.com
11/16/2003 08:36 PM
Please respond to "Edward Agostinho"
To: <ccielab@groupstudy.com>
cc: (bcc: Donny MATEO/ADPC/ASIA/BANQUE_INDOSUEZ/FR)
Subject: Layer2 versus Layer3 EtherChannel
Hi Group
I am not sure what the difference between Layer2 and Layer3 etherchannel
is
and when you would use either? Naturally, etherchannel is a PagP mechanism
but
when would you use Layer 3 and when would you use Layer 2? Would you
assign IP
addresses to the interface port-channel in a Layer 3 senario?
"For Layer 2 EtherChannels, you must configure the channel-group interface
configuration command, which automatically creates the port-channel
logical
interface. You cannot put Layer 2 interfaces into a manually created
port-channel interface.
You create Layer 3 port channels by using the interface port-channel
command.
You must manually configure the port-channel logical interface before
putting
the interface into the channel group."
Thanks
Edward
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