Hello to all,
Regarding the RIP routing protocol, when tweaking the timers using the "timers basic" command there is a holddown parameter. According to the command reference, a route enters the holddown state when "an update packet is received that indicates the route is unreachable".
However, is this possible in RIP? The only way to declare a route unreachable in RIP is to send an advertisement with metric set to 16. As far as I know, upon receiving such information, the route is immediately removed from the routing table, instead of going into holddown.
As I see it, the only way for a route to enter the holddown state in RIP is an absence of RIP advertisements for this network during the "invalid" period since the last RIP update.
Am I perhaps missing anything? Thanks for any guidance!