[AusNOG] IOS router selection

[Alex Samad - Yieldbroker]

Hi

I am looking for some documentation that explains the way cisco behaves.

If I have this

IOS
ip route 0.0.0.0 0.0.0.0 w.x.y.z 230
ip route 0.0.0.0 0.0.0.0 f.g.h.i  240
ip route 0.0.0.0 0.0.0.0 r.s.t.u 250

ASA
route internet 0.0.0.0 0.0.0.0 w.x.y.z 230
route internet 0.0.0.0 0.0.0.0 f.g.h.i 240
route internet 0.0.0.0 0.0.0.0 r.s.t.u 250


this tells me the default gateway used is w.x.y.z, unless that gateway is unavailable or dead..

I am looking at how Cisco decides when a gateway is dead, I found documents on route selection, but nothing that specifically address dead gateways

I presume, and from what I have seen if there is no arp its dead..

Thanks