Tracking command / IP router with null and track

[mrochac]

Gents, ladies - i am a little unsure on how to address / read this command; just taking over ownership of the infras. and i am not sure what the mapping means on here....

NLCU-PuppyMonkeyBaby-R1#sh run | in track

track 1 ip sla 1 reachability
track 11 ip route 10.179.129.0 255.255.255.0 reachability

ip route 0.0.0.0 0.0.0.0 172.24.5.254 track 1
ip route 172.18.119.0 255.255.255.0 Null0 track 11 (this is where i am not sure where traffic is going if Null0 is being used.)

[Mark Malone]

Hey whats the route currently known as , is it in BGP advertised as network statement  ? it could just mean that its conditionally advertised even if you cant reach it , the route will still be in the table

whats the importance i suppose of that subnet if there advertising it like this , it can be a stability thing in the network as well some people chose to force advertisement even if its not available, its not weighted either so its being advertised now somewhow

[mrochac]

The idea is to keep track of the link and if it goes down to stop advertising - its as you stated conditionally advertised. But the null0 is throwing me off...

[Mark Malone · Accepted solution]

whats that route currently known as in the local routing table , bgp ,igp ?