FHRP—Enhanced Object Tracking of IP SLAs Operations

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Today – I would like to present very useful Cisco IOS feature – FHRP—Enhanced Object Tracking of IP SLAs Operations – is an extension of traditional object tracking (eg. interface tracking). Very basic example of using it, is removing of static route from routing table if specified IP address is not reachable.

1. Creating SLA probe number 1, defining SLA action type and destination, parameters for threshold and timeout for 2seconds, frequency for 5seconds
conf t
ip sla 1
icmp-echo 120.0.100.1
threshold 2000
timeout 2000
frequency 5

2. Making SLA 1 probe alive
ip sla schedule 1 start-time now life forever

3. Linking SLA probe with tracking and adding tracked static route
track 1 ip sla 1 reachability
ip route 0.0.0.0 0.0.0.0 120.0.100.1 track 1

4. Verify track reachability
show track 1

Cisco Configuration Guide: FHRP—Enhanced Object Tracking of IP SLA Configuration Guide

 

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