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New Member

eigrp, 2 routes

if I have a router with 2 ways out the building, 1 a 100 meg line, the other an isdn line, will eigrp automatically use the 100 meg and if that fails use the isdn ?

2 REPLIES
VIP Purple

Re: eigrp, 2 routes

Hello,

yes it does, provided you advertise both interfaces in EIGRP.

When you do a 'show ip eigrp topology', you will likely see two entries for the destination networks, and the entries will say '1 successors', which is your FastEthernet interface...

HTH,

GP

New Member

Re: eigrp, 2 routes

yes, the router will use the second line if you already ran EIGRP on the isdn interface, but the route may not exist in the topology database if the AD (Advertised Distance) in the other side of isdn is more than FD (Feasible Distance) of the primary link, so it may take a time to find the other route.

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