[j-nsp] Load balancing using Ethernet Aggregate interface ae0

[Jonathan Lassoff]

On Tue, Mar 15, 2011 at 11:31 PM, medrees <medrees at isu.net.sa> wrote:
> Hi Doug
>
>   Thanks for your reply, my question is that "is it possible to make
> aggregation in two links from juniper side and the other side is connected
> to two different Layer-2 Cisco switches for load balance?" currently I'm
> connected this setup but one physical interface as primary and the other as
> backup inside the ae0.

I suppose it's possible that this might work in an active-standby
mode, but if the remote device(s) that you are connecting to are two
physically separate devices, you're much better off using a
higher-layer protocol to balance traffic over both links.

What type of hardware are the upstream Cisco devices? If they're
something like Cisco Catalyst 6500's with VSS running, it's possible
for you to balance traffic across both devices easily, since they both
act like a single device.

If they're two physically-separate devices, you'll have a hard time
getting this to balance properly in the reverse direction since you'll
be causing the source MAC address of your M10i to flip-flop between
switches (as seen from the perspective of your "upstream" Cisco
switches).

Hope this helps.

Cheers,
jof