From: Godswill Oletu (oletu@inbox.lv)
Date: Sat Sep 10 2005 - 14:14:51 GMT-3
these might not have been clear in my last post....
*channel-group not port-group is use for layer 2 etherchannel
*the channel-group command creates a logical port-channel interface...(layer
2 or 3)
----- Original Message -----
From: "Godswill Oletu" <oletu@inbox.lv>
To: "Edwards, Andrew M" <andrew.m.edwards@boeing.com>; "Melwani, Manoj J"
<melwanim@citigroup.com>; <ccielab@groupstudy.com>
Sent: Saturday, September 10, 2005 3:07 AM
Subject: Re: Por-Channel vs Ether-Channel
> 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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