AS 111 wanted to use AS 200 as the preferred path for 172.20.5.0/24 and AS 100 as the backup. After the configuration, AS 100 is not used for any other routes.
Which configuration resolves the issue?
route-map SETLP permit 10
matchip address prefix-list PLIST1
set local-preference 99
route-map SETLP permit 20
routerbgp 111
no neighbor 192. 168.10.1 route-map SETLP in
neighbor 192.168.20.2 route-map SETLP in
route-map SETLP permit 10
matchip address prefix-list PLIST1
set local-preference 110
route-map SETLP permit 20
routerbgp 111
no neighbor 192. 168.10.1 route-map SETLP in
neighbor 192.168.10.1 route-map SETLP out
Answer(s): A
Explanation:
There is an implicit deny all at the end of any route-map so all other traffic that does not match 172.20.5.0/24 would be dropped. Therefore, we have to add a permit sequence at the end of the route-map to allow other traffic.
The default value of Local Preference is 100 and higher value is preferred so we have to set the local preference of AS100 lower than that of AS200.