From: Godswill Oletu (oletu@inbox.lv)
Date: Tue May 09 2006 - 19:51:33 ART
Mani,
I do not know if I follow:
I am not seeing the relationship between 'interface vlan 5' on both switches
and the etherchannel. You might have configured etherchannel on both
switches, but to form adjancency over that etherchannel, you have to use the
corresponding 'Port-channel xxx' interface and not 'interface vlan 5'.
Assign the IP address to the 'Interface Port-channel x' on both switches
instead.
Both L2 & L3 etherchannel are the same in operation; one can achieve more
bandwidth and they provide for redudancy, such that, when one of the member
links go down, the rest can still be up. The only difference, is that one is
layer 2 (similar to a switch port) and the other is layer 3 (similar to a
routed switch port).
You can not form OSPF adjancency with a L2 etherchannel, just like you
cannot form OSPF adjancency with a switchport.
HTH
Godswill Oletu
----- Original Message -----
From: "mani poopal" <mani_ccie@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, May 09, 2006 7:28 AM
Subject: OSPF ACROSS L2/L3 Etherchannel
> Hi Group,
>
> A quick question
> First 3550(int vlan 5=10.10.10.1, lo0=11.11.11.11) is connected to
another 3550(interface vlan 5=10.10.10.2, lo0=12.12.12.12)(Etherchannel).
Both swithces are bundled togeter through Etherchannel. If we run ospf on
both swithces, there should be ospf neighbor relationship between both
switches. Now the question is what is the difference/advamtage between L2
etherchannel vs L3 etherchannel. I don't have 2 3550's to test the
configuration.
>
> First 3550:
> router ospf 1
> network 10.10.10.0 0.0.0.255 a 0
> network 11.11.11.11 0.0.0.0 a 0
>
> Second 3550:
> router ospf 1
> network 10.10.10.0 0.0.0.255 a 0
> network 12.12.12.12 0.0.0.0 a 0
>
> thanks
>
> Mani
>
>
> B.ENG,MCSE,CCNP,CCSP,CCIE#14645
> (416)431 9929
> MANI_CCIE@YAHOO.COM
>
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