[c-nsp] OSPF Equal Costs Routes Question

[christopher.a.kane at jpmchase.com]

>Hi there...
>
>What is the maximum number of OSPF equal cost routes that are supported
>in IOS?  I'm thinking of using a Cisco 3640 to connect multiple low
>speed ethernet links from site to site and would like to have 4 ethernet
>links coming in via a 4 port 10 meg card (NM-4E) .. this is for
>redundancy and "bonding for performance".... I don't believe 4 of them
>is a problem but how many can you go up to?
>
>The other end of the link is a 6509 running IOS...
>
>Thanks,
>
>Paul Stewart


It depends on IOS level. Newer versions (as of 12.3(2)T) allow you to go 
up to 16. The limit used to be 6. This is a protocol independent feature. 
Here's the Command Reference link:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_pih.htm#wp1124352

If you're simply looking for redundancy and multiple paths, then you'll be 
fine. If you are looking for load sharing then there are other things to 
consider in addition.

-chris

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