From: ted.mcdermott@exeloncorp.com
Date: Thu Oct 31 2002 - 14:57:06 GMT-3
IBM Netfinity (dual) NICs have three modes: Adapter Fault Tolerance (AFT)
which is a primary and backup configuration, Adaptive Load Balancing (ALB)
where both NICs are active, and Etherchannel.
-----Original Message-----
From: James R. Scobey [mailto:jscobey@sms.com]
Sent: Wednesday, October 30, 2002 4:06 PM
To: Craig King; R. Benjamin Kessler; ccielab@groupstudy.com
Subject: Re: FastEther Channel
There are NICs that can be dual homed to different switches and manage
failover with software on the host, as long as the switches have a common
VLAN. Intel pro-share is one.
FastEtherChannel is a Cisco proprietary protocol, PAgP is the IEEE version.
I've yet to hear of a NIC capable of understanding either, though I could be
mistaken.
--Scobey
----- Original Message -----
From: "Craig King" <craig.king@comcast.net>
To: "R. Benjamin Kessler" <bk-lists@kesslerconsulting.com>;
<ccielab@groupstudy.com>
Sent: Wednesday, October 30, 2002 3:33 PM
Subject: Re: FastEther Channel
> Etherchannel actively load balances on both links (which link depends on
> source/destination addressing), so both links are active and carry
traffic.
> 2 FastEthernet ports bonded together could transport 400Mbps if running
full
> duplex (in theory). Only when one link fails will all traffic cross a
> single link.
>
> See
>
http://www.cisco.com/warp/public/cc/techno/media/lan/ether/channel/prodlit/f
> aste_an.htm for more detail.
>
> ----- Original Message -----
> From: "R. Benjamin Kessler" <bk-lists@kesslerconsulting.com>
> To: "'Nate Kleven'" <cciemail@intellinet.ws>; <ccielab@groupstudy.com>
> Sent: Wednesday, October 30, 2002 2:38 PM
> Subject: RE: FastEther Channel
>
>
> > If you have a server with two NICs, you can connect one to each switch
> > and configure fail-over (only one active at a time).
> >
> > If you connect the two NICs to the same switch you can do port
> > aggregation (FastEtherChannel) to get more than 100Mb of bandwidth.
> >
> > I don't think you can "split" these NICs between switches and have them
> > both active - you would have CAM table issues.
> >
> > Remember, the way Etherchannel works, traffic between two end points
> > (e.g. server A and client B) will always cross the same "wire" (unless
> > there's a failure) which means that you won't get more throughput than
> > is available from a single pipe.
> >
> > Hope this helps,
> >
> > Ben
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Nate Kleven
> > Sent: Wednesday, October 30, 2002 12:33 PM
> > To: ccielab@groupstudy.com
> > Subject: FastEther Channel
> >
> > Can I build a FastEther channel to a server if it is homed to two
> > different
> > chassis? In other words, if I had a teaming NIC, can I plug one
> > connection
> > into SwitchA and the second into SwitchB for redundancy? Is there a
> > better
> > way to do that?
> >
> > Thanks.
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