From: Godswill Oletu (oletu@inbox.lv)
Date: Sat Sep 10 2005 - 04:07:37 GMT-3
Manoj & Edward,
It really depends on how one looks at it.
CatOS switches use the 'set port channel' command to configure
etherchannels; the 2900 series switches will use the 'port group' command,
for some weird reasons 3500 switches, say one must insert a '-' in between
both words ie 'port-group' (note the dash). However, we configure it (either
through port channel, port group or port-group command), it is call
etherchannel.
To configure one on a CatOS switch:
Switch(enable)set port channel 2/1-5 mode on
(This will group ports 1-5 on module 2 into a single etherchnnel group).
In an IOS switch, we can achieve the same goal by:
#interface range fa0/1 - 5
#channel-group 1 mode on
!
But with the advent of 3550 switches and their evil twin call the EMI IOS,
etherchannel as we use to know it, is now being called layer 2 etherchannel
and port channel is call layer 3 etherchannel or port channel interface. To
configure a port channel or layer 3 etherchannel:
#interface port-channel 2
#ip address 1.1.1.1 255.0.0.0
#no switchport
!
#interface range fa0/1 - 5
#channel-group 2 mode on
#no switcport
Not only that one can get upto16 Gbps full-duplex logical link accross a
switched network, now with port channel interface, a whoppy16 Gbps
full-duplex logical link across a routed network is up for grabs! (as if one
will ever need to route traffic that large and crazy).
So, I will say that the difference is that one (Ether-Channel) is the "old
etherchannel" as we use to know it or to be politically correct, layer 2
etherchannel and Port-Channel is layer 3 etherchannel. They are all use to
aggregate upto 8 maximum identical and similarly configured interfaces
(fastethernet or gigabit) to achieve a larger switched/routed throughput and
fault tolerant.
HTH
Godswill Oletu
----- Original Message -----
From: "Edwards, Andrew M" <andrew.m.edwards@boeing.com>
To: "Melwani, Manoj J" <melwanim@citigroup.com>; <ccielab@groupstudy.com>
Sent: Friday, September 09, 2005 7:18 PM
Subject: RE: Por-Channel vs Ether-Channel
> They are the same logical concept.
>
> This is the way IOS based Catalyst switches look for etherchannel versus
> the CATOS methodology.
>
> HTH,
>
> andy
>
> -----Original Message-----
> From: Melwani, Manoj J [mailto:melwanim@citigroup.com]
> Sent: Friday, September 09, 2005 1:29 PM
> To: ccielab@groupstudy.com
> Subject: Por-Channel vs Ether-Channel
>
>
> Can someone explain whats the difference in Port-Channel and
> Ether-Channel?
>
>
>
>
> Thanks...
> Manoj.
>
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