about the floating routing's question

[shan-cao]

question is whether the router can use rip2 as the main routing protocol not eigrp when it use floating routing to backup a main link.

[gongxinping]

You can use any routing protocol.

[gwoodyard]

YES!

A floating route is a static route with a higher administrative distance.

For example

Sh ip route

D 1.14.11.26/32 [90/156160] via 1.14.11.21, 3w3d, Vlan10

[90/xxx] 90 is the admin distance for EIGRP (RIP is 120)

so if you add the following route

ip route 1.1.1.1 255.255.255.0 2.2.2.2 200

This will give you a floating route of 200. This will not enter the route table until 1.1.1.1 is missing.