Catalyst 6500 and 4500 Ether-channel load balancing

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Jul 28th, 2010
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How can I find out if my load balancing is truly balancing the load across my links? In other words how can I see the traffic load on each of the links in the channel?



Mike

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Chetan Kumar Ress Wed, 07/28/2010 - 12:25
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Hi Burley,


The below chart show the Ether-Channel load balancing.



Number of Ports in the EtherChannel

Load Balancing

8

1:1:1:1:1:1:1:1

7

2:1:1:1:1:1:1

6

2:2:1:1:1:1

5

2:2:2:1:1

4

2:2:2:2

3

3:3:2

2

4:4


But to check real time traffic i suggest you to use SNMP ( Bandwidth monitoring for those switch ports )


It can give you good report that any command line in switch.



Regard

Chetan Kumar

http://chetanress.blogspot.com

burleyman Wed, 07/28/2010 - 12:48
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Thanks for the chart, I did already look at that. I was checking to see if there was a coomand that would give me some indication as to the load on each of the links.



Mike

Jon Marshall Wed, 07/28/2010 - 15:59
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Mike


What if you just look at each interface to see the load/packets transmitted and received. Would that not tell you how it was load-balancing the traffic across the links ? You could clear the counters to get a base to start with.


One other thing - what does "sh etherchannel load-balance" show ? From memory i don't think it shows what you want but can't remember to be honest.


Jon

burleyman Thu, 07/29/2010 - 04:29
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Jon,


Thanks for pointing out the obvious....some times I wonder about my mind and over thinking the obvoius....


As for the command   sh etherchannel load-balance   it just show what Load Balancing method is in use.


I cleared the counters and I will check later.


Thanks for your Help Jon.


Mike

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