[c-nsp] CEF Load balancing over Etherchannel (3750)

[Dan Sabau]

Did you tried on both ends of the portchannel?
i'm running: Cisco IOS Software, C3750 Software 
(C3750-ADVIPSERVICESK9-M), Version 12.2(35)SE2, RELEASE SOFTWARE (fc1)


Paul wrote:
> This doesn't work on 3750.  I tried.  Also tried changing cef algorithm
> to universal 1 and also universal with some random hex... Apparently
> even the src-ip follows the same rule as the CEF load balancing.
> Too bad we can't change per port channel balancing :P
>
> Dan Sabau wrote:
>> Had the same problem, I've change the way etherchannel load balances 
>> the link to:
>> port-channel load-balance src-ip
>> and every thing was ok after.
>>
>> Paul wrote:
>>> Does anyone know how to make CEF load balancing work over 
>>> etherchannels and actually load balance on the etherchannel?
>>> I have two GEC interfaces with 2 ports in each, and then I have two 
>>> routes multipath, one to each GEC interface
>>> The problem is that the CEF algorithm is the same as the 
>>> etherchannel algorithm and each one of the etherchannels ends up 
>>> only sending out one of the two ports so it is not load balancing.   
>>> I have tried changing the port-channel load-balance setting to 
>>> various things (I can not use MAC because it's from one router to 
>>> another) and I have tried changing the cef load sharing algorithm.
>>> Maybe this is a limitation of the 3750 platform? I have not tried 
>>> this on any of the other equipment.
>>>
>>> Paul
>>> _______________________________________________
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>>>   
>>
>
>

-- 
Dan Sabau
Manager NOC Cluj
New Com Telecomunicatii SA,
Telefon: +40-740078983
Email: dan.sabau at newcom.ro