variance

[Ibrahim Jamil]

Hi

i have unequal cost to reach a particular destination (100Mbps and 155Mbps) , Cisco EIGRP is running on this two path , in routing table i only see 1 path (155Mbps) to reach 10.155.0.0/24 i need to achieve load balancing in this links , i read that variance could achieve this task , do i need to configure it on both side

thanks

ibrahim

[Nagendra Kumar Nainar]

Hi Ibrahim,

If you need to install 2 unequal cost path in RIB, you need the variance configured. For example, Assume you have 2 available path P1 and P2 and if locally calculated FD for P1 is 100 and for P2 is 200, the variance should be configured as 2 or more inorder to get both the paths installed in RIB.

HTH,

Nagendra

[Raju Sekharan]

Hi Ibrahim,

You need to configure variance  on both routers if this is a back to back betwen 2 routers to acheive load-balancing in both directions

Nagendra has already explained how to calculate  the variance value

Thanks

Raju

[cadet alain]

Hi,

you could also make the 2 paths equal using an offset-list and then you wouldn't need the variance command.

Note that the variance command will work only for paths that pass the feasibility condition so the path with the worst FD must have an AD strictly < to FD of successor.

Regards.

Alain

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[Ibrahim Jamil]

thanks to all ,

Alain my freind , how would i make he 2 paths equal using an offset-list

thanks