Hello folks
I have been implementing an EtherChannel on my 3750E switches based on source/destination IP address hashing. I have found documents that explain the hashing algorithm for layer 2 load balancing based on source/destination MAC addresses. However, does someone know how the algorithm works for source/ destination IP address hashing? If so, could you explain how this works?
Thanks a lot!
Miguel
"Miguel Sanders" ha scritto nel messaggio news: snipped-for-privacy@d77g2000hsb.googlegroups.com...
Hi,
CEF Load Sharing algorythm maps destination prefixes to a maxiumum of 16 paths; an hash function then assign source-destination pairs to a particular path. You can have a look at the distribution using "sh ip cef internal"
There are actually three different algorithms available: the standard/old one, the "universal" and a "tunnel tuned" version. The Universal algorithm is seeded, so each router can have different hash results and the traffic is more evenly spread among the internetwork
Regards, Gabriele
messaggionews: snipped-for-privacy@d77g2000hsb.googlegroups.com...
That is interesting, but it is not related to the etherchannel load distribution algorithm.
To the OP - if you can't find anything in the documentation and have support consider a TAC case. It is possible that cisco regard the algorithm as a trade secret and they may not be prepared to release it.
messaggionews: snipped-for-privacy@d77g2000hsb.googlegroups.com...
niet weergeven -
That's funny because they do give it for load balancing based on layer
2 data (MAC address).
this doc implies they use the same algorithm whether it is working on L2 or L3.
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