General Notes
- Allows monitoring of network performance and network availability testing with probes
- Track objects allow you to dynamically control things like static routes, FHRP priorities, etc
- Possibilities for object tracking include:
- IP SLA instances
- Interface status
- Groups of objects
Useful show commands
show ip sla configuration
- Shows configuration for all IP SLAs set up on device
show ip sla statistics
- Shows statistics for all IP SLAs set up on device
show track
- Shows configuration and status of tracking object
Standard IP SLA w/ track for HSRP Config
! Tracking line protocols of WAN interfaces
track 11 interface GigabitEthernet8 line-protocol
track 12 interface FastEthernet0 line-protocol
! Tracking ip routing status of tunnel interfaces for backup route
track 21 interface Tunnel1 ip routing
track 22 interface Tunnel2 ip routing
! Track 23 will be up if both tunnels are not routing - set up for backup route to be installed
track 23 list boolean and
object 21 not
object 22 not
! Tracking for IP SLA 101
track 100 ip sla 101 reachability
delay down 15 up 60
! Decrementing HSRP based on IP SLA and line protocols of WAN interfaces
int vlan 100
standby 1 track 11 decrement 10
standby 1 track 12 decrement 10
standby 1 track 100 decrement 10
! Routing management traffic to secondary router if neither tunnel is routing
ip route 10.100.100.0 255.255.255.0 10.1.174.253 track 23
! Testing reachability over DMVPN overlay and starting SLA
ip sla 101
icmp-echo 172.16.1.254 source-interface Tunnel1
request-data-size 100
frequency 5
ip sla schedule 101 life forever start-time now