Hi, the problem is:
neta netc
A-B--C
well, all books of world state:
- when netc went down, router C delete it from RT and poisoned this route
(netc) to B.
B receives the poison update , triggers the Holddown timer (the netc is in
possibly down) and generates a poisoned routes to router A .
Router A go in holddown.
After holddown the route is purged from RT.
sound well ?
In my lab :
- when netc went down router c delete it from Rt and generates a poison
update to B.
But B dont get in holddown and delete quickly the route. B generates a
poison update to routerC .
Router C deletes immediatly the net.
And holddown ?!!!
To generate an holddown state in a router , i have configurated
passive-interfaces (to simulate a broken topology with no layer 1
disruption)on A per ex., and B after invalid timer time-out get in
holddown state. But always, B generates a poisoned route (16) to C that
deletes the network ( no holddown).
My question is :
Is that the really and good functionality of Rip or not?
thanks in advance
giuseppe
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