[j-nsp] EX series - LACP flapping during ethernet storm.

[Paul Stewart]

We have LAG running on EX4200's today ... traffic is pretty much perfectly
load balanced.  Did I perhaps miss part of this conversation? ;)

Paul


-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Mark Tinka
Sent: Thursday, October 20, 2011 10:06 AM
To: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] EX series - LACP flapping during ethernet storm.

On Thursday, October 20, 2011 09:18:06 PM Chuck Anderson
wrote:

> Not true according to these:

Not according to what we actually saw in the field.

We configured LAG's with LACP and our EX4200 couldn't load balance any of
the traffic.

While those links discuss how the box performs load sharing, it isn't
actually configurable at all, nor does it work. The issue also affects the
EX3200, but not sure about the rest of the EX family.

We opened a case with JTAC and they confirmed that a hardware limitation
means the switch doesn't actually do any kind of load balancing over LAG's.
JTAC said there are some internal discussions to write software to "sort of
make it load share", but that's not definite.

We ended swapping the switches out with Cisco's instead, and got our load
balancing working.

Cheers,

Mark.