I don't believe there's a way to reconfigure the BigIron; however,
you'll likely get even load balancing if you can create two separate
sessions / flows. Is that possible in your situation?
On Oct 29, 2010, at 3:40 AM, Dana wrote:
Hi all,
I have noticed a little problem with our LAG configurations in our
Bigiron RXes. The problem description is as follows:
We have configured a LAG of two or more ports. From time to time we
are getting a high utilization port message from our monitoring
system on one of the two/more ports in that LAG. Thus, it seems that
the software does not share the traffic evenly amongst the available
ports.
After reading the manual, I understand that there is no way we can
manipulate the load-sharing method of our LAGs. BigIron RXes only
load-share using HASH-BASED method. Although Foundry/Brocade claims
that this method should do the job properly, it is not the case in
our network. Let me give you some lines to show the problem:
lag "trunk-1" static
ports e 2/7 to 2/8
primary-port 2/7
deploy
#sh int e 2/7 | i util
300 second input rate: 155247818 bits/sec, 39455 packets/sec,
15.90% utilization
300 second output rate: 25029300 bits/sec, 11300 packets/sec, 2.61%
utilization
sh int e 2/8 | i util
300 second input rate: 189413832 bits/sec, 44085 packets/sec,
19.36% utilization
300 second output rate: 482937687 bits/sec, 79502 packets/sec,
49.05% utilization
As you can see above, the output rate (from BIRX to an FWSX) has a
ratio of 49% vs 2%. However, if you look at the input rate (from
FWSX to BIRX), it has more or less the same amount of traffic 19% vs
15%.
My question is now, is there anyway we can do in the BIRX to get the
two ports more balanced? I hope some of you has experienced the
same problem and could share the solution/trick with me.
Thanks in advance.
--
Dana
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