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Beginner

EIGRP Equal cost Load Balancing between Cisco 3560 and 4500 Switches

Hi Friends,

 

We have two point to point links between 3560 and 4500 switches, now we want to configure EIGRP equal cost load balance between those switches.

Please someone help me for this. 

Thanks & Regards, Srinivas. N.
3 REPLIES 3
VIP Expert

Re: EIGRP Equal cost Load Balancing between Cisco 3560 and 4500 Switches

Generally, if the links are p2p between the two L3 switches, and if they are running at the same bandwidth, by default, ECMP should happen. Exceptions would include if you have more than the default number of ECMP links (which can generally be increased and two [and more] is usually allowed for by default) or if you change EIGRP metrics on the interfaces.

BTW, EIGRP also supports un-equal cost load balancing. For that, by default, it won't happen. I.e. it will require additional configuration.

Also BTW, for a pair of L3 switches, you also likely have the option to Etherchannel the links to load-balance that way too.

Beginner

Re: EIGRP Equal cost Load Balancing between Cisco 3560 and 4500 Switches

Thanks for response Joseph,

 

Already we have ether-channel setup, but when any of one link went down then other link also getting issue (as it is bundling other link also having issue) by that time we are terminating problem link then connectivity is stable on one link. 

 

we want to avoid this issue, for this case hope EIGRP is the good one.

Thanks & Regards, Srinivas. N.
VIP Expert

Re: EIGRP Equal cost Load Balancing between Cisco 3560 and 4500 Switches

Interesting you're having a problem with Etherchannel.

In any case, assuming the Etherchannel is a routed link, just break out member links and make them also similar L3 links. Again, EIGRP will likely see such as ECMP.
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