administrative distances and routes

[mpedro]

I hope I can word this correctly for everybody to understand.

Lets say I have a remote router(router A) connected to 2 head end routers.(routers B & C)

Router A has 2 different EIGRP processes running, one from each head end router.

Router A learns these routes

10.200.200.0/24 with a AD of 95(from router B)

10.200.0.0/16 with a AD of 90(from router C)

So my question is that if a packet is on router A's network and has a destination of 10.200.200.1, will it take router B, more specific route but higher AD, or will it take router C, less specific route, but lower AD.

Thanks for your help

[jsayer · Accepted solution]

The router will evaluate candidate routes in the following order:

longest match

administrative distance

metric

so in your example, the longest match will be used to route the packet even though the AD is higher.

Hope this helps