[c-nsp] 802.3ad questions..

[Yuri Bank]

It should work, but with EtherChannel you can only load balance based on
src,dst mac/ip/port ( depending on your hardware ). The only problem I
forsee is that the port-channel will not know when your 600Mbit shaped link
is at capacity, and will continue to try and send frames over it when your
1Gbit link still has 400Mbits left. You may also have issues with packets
arriving out of order since the 600Mbit link will queue the excess traffic.
Upgrade the 600Mbit link? :)

-yuri

On Mon, Mar 1, 2010 at 9:36 AM, TCIS List Acct <listacct at tulsaconnect.com>wrote:

> Hi all,
>
> We have (2) Metro Ethernet connections from two different carriers
> connecting our two locations at the moment.  We need to provide for
> redundancy at the L2 level for these, and would like to combine the
> bandwidth into one logical bundle.  I'm fairly well versed at the L3 level,
> but have little experience of L2 features (aside from VLANs), so I was
> looking for a bit of guidance.
>
> We will be using Cisco switches on both sides of the link(s), and it seems
> 802.3ad is the way to go -- but I'm not sure if LACP or EtherChannel is
> appropriate here, or if there is something else I should be considering.
>  Also, to throw another issue into the mix -- these two links are not
> currently equally sized -- one is shaped to 600M, the other is a full Gig,
> so a way to specify link speed and have it load balanced appropriately would
> be great as well.
>
> TIA.
>
> --Mike
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