What are sort of advantage of layer 3 etherchannel ? vs layer 2

Dear experts ...

I was playing around with etherchannel, using gns3 cisco 3725 + NM-16ESW.
Having trouble to play layer 3 etherchannel. checked here
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t8/feature/guide/ft1636nm.html#wp1437057and
did not see any layer 3 ther channel.

1. Does NM-16ESW not support layer 3 etherchannel ?
2. What are sort of advantage of layer 3 etherchannel ? vs layer 2 ether
channel ?

Layer 2 :

int po 1
switchp mo acc
switchp acc vlan x

int rang f0/1 - 3
channel 1

int vlan x
ip add xxxxx

Layer 3 :
int po 1
no switchp
ip add xxxxx

int rang f0/1 - 3
channel 1
no switchp

seems like all the same .... as both will be routed by using virtual
interface ..... int po1 vs int vlan x
Did i miss something ?

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Received on Sun Jul 19 2009 - 01:49:05 ART