hello
let’s say you have a static route to your ISP:
ip route 80.0.0.1 255.255.255.255 192.168.0.1
and now you want to send down a default route based on the availability of the connection to this ISP.
here’s the config
ip route 80.0.0.1 255.255.255.255 192.168.0.1 track 1
ip sla 1
icmp-echo 192.168.0.1
freq 5
track 1 ip sla 1 reachability
ip prefix-list myispprefix permit 80.0.0.1/32
route-map isp1prefix permit 10
match ip address prefix-list myispprefix
router ospf 1
default-information-originate route-map isp1prefix
If you don’t have an ISP and you want to ”fake it”, you can use a fake route. e.g. 169.254.0.1 255.255.255.255 null0 track 1
