From: Tony Martin (antonio.marting@gmail.com)
Date: Sun Mar 18 2007 - 04:16:04 ART
Hi group,
etherchannels in sw1 & sw4 require to be configured as L2Etherchannel or
L3Etherchannel?
Thanks,
Matt.
On 2/3/07, zesty@usa.com <zesty@usa.com> wrote:
>
> When the intermediate switch in the path (Sw2 & Sw3) has only one
> physical connection to each ends (Sw1 & Sw4) as in this case, there is no
> different than a link directly between two end points because the
> intermediate switch has only one path to the destination. It's not like
> SW1 sends a frame to Sw2, then Sw2 has a choice wheter to send to sw 4
> via SW3, or any other link. There is only one link, no choice for SW2
> but to forward it to an only path to Sw4. In brief, setting load
> balancing on Sw1 & Sw4 is sufficient in this case. When the intermediate
> switch has multiple paths to the destination, it's best to mix up the
> algorithm so that the load balacing scheme is different. If all the
> devices using the same algorithm, it will lead to CEF polarization.
> Regards, Tom
>
> ----- Original Message -----
> From: graham@cisco-engineer.com
> To: "'Joe Yohannan'" , ccielab@groupstudy.com
> Subject: RE: Switch load balancing
> Date: Sat, 3 Feb 2007 17:58:07 -0000
>
>
> Agreed this was my initial thought
>
> But SW1 and SW4 arent directly attached and each are connected to SW2
> and
> SW3 via a single link, can a port channel be done over multiple hops?
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Joe
> Yohannan
> Sent: 03 February 2007 17:15
> To: graham@cisco-engineer.com; ccielab@groupstudy.com
> Subject: RE: Switch load balancing
>
> The 3560 offers a "src-dst-ip" option under the port-channel
> load-balance
> command. It sounds to me that that is what the question is looking
> for.
>
> - Joe
>
>
> > From:
> > Reply-To:
> > To:
> > Subject: Switch load balancing
> > Date: Sat, 3 Feb 2007 17:06:09 -0000
> >
> > Hi group,
> >
> >
> >
> > I'm working on a question which asks to load balance between two
> switch
> > endpoints 1 and 4
> >
> >
> >
> > The layout is
> >
> >
> >
> > ----------------- SW3------------
> >
> > SW1< >SW4
> >
> > ----------------SW2--------------
> >
> >
> >
> > Question in its self is not hard but the sting is, where you have a
> choice
> > you must prefer source/destination ip Balancing?
> >
> >
> >
> > Now the load balance method that came to mind was a Layer 3
> etherchannel and
> > port-channel load balancing, but I can't see how that would fit in
> this
> > scenario? Should I ignore the bit at the end which stipulates where
> you have
> > a choice?
> >
> >
> >
> >
> >
> > Thanks
> >
> >
> >
> > Graham
> >
> >
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