Below is my configuration for tracking.
<code>
track 123 rtr 1 reachability
!
interface Vlan1
description primary-link
ip address 10.1.2.71 255.255.255.0
!
interface Vlan2
description backup-link
ip address 192.168.4.254 255.255.255.0
!
ip local policy route-map MY-LOCAL-POLICY
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 10.1.2.17 track 123
ip route 0.0.0.0 0.0.0.0 192.168.4.5 254
!
ip sla 1
icmp-echo 10.1.2.17
timeout 1000
threshold 2
frequency 3
ip sla schedule 1 life forever start-time now
access-list 101 permit icmp any host 10.1.2.17 echo
!
route-map MY-LOCAL-POLICY permit 10
match ip address 101
set ip next-hop 10.1.2.17
set interface Null0
</code>
<code>
Router#sh ip sla stat
Round Trip Time (RTT) for Index 1
Latest RTT: 1 milliseconds
Latest operation start time: *16:32:49.411 UTC Sun Jul 14 2002
Latest operation return code: OK
Number of successes: 56
Number of failures: 2
Operation time to live: Forever
</code>
<code>
Router#show ip route track-table
ip route 0.0.0.0 0.0.0.0 10.1.2.17 track 123 state is [up]
Router#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 10.1.2.17 to network 0.0.0.0
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.2.0 is directly connected, Vlan1
S* 0.0.0.0/0 [1/0] via 10.1.2.17
Router#</code>
Once I pull the ethernet cable for the 10.1.2.0 network everything appears to work except for one thing, the routing table.
<code>
Router#
*Jul 14 16:34:44.247: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to down
*Jul 14 16:34:44.251: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
*Jul 14 16:34:45.255: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to down
*Jul 14 16:34:45.807: %TRACKING-5-STATE: 123 rtr 1 reachability Up->Down
Router#show ip route track-table
ip route 0.0.0.0 0.0.0.0 10.1.2.17 track 123 state is [down]
Router#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
Router#</code>
Shouldn't I see the default route set to 192.168.4.5?
