ACE ft track-host method

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Apr 21st, 2010
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  does anyone know, how the ace performs ft track-host probes? How does it test, ICMP, arp, whatever? How often tests, what are the failure detection conditions?

For example in the following situation:

ft track host GW
  priority 60

ft group 1
  peer 1
  peer priority 50
  associate-context Admin

When we shut down the ACE 4710 uplink interface on the swtich, where it could reach the gw (, no failover happens.

(I know that I can define own health probes, but I become curious about track-host command, while there are no definitions in the documentation about it's testing method)



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Sean Merrow Wed, 04/21/2010 - 07:23
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Hello Jonagy,

I'm not sure if I fully understand your question, but let me see.

When configuring your ACE for Host tracking, you would first configure one or more probes to be applied to the Host Tracking configuration.  Notice that Step 4 of the Configuring Tracking and Failure Detection for a Host or Gateway is not shown as Optional.  You can configure the probes with the type and  interval that best suites your environment.

ft track host TRACK_GATEWAY


  probe GATEWAY_TRACK1 priority 10

  probe GATEWAY_TRACK2 priority 20

  priority 50

Hope this helps,


jonagyula Wed, 04/21/2010 - 22:51
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Hi Sean,

  yes it helps. Formerly I think I misunderstood the guide. I thought the track-host command is a general purpose gw tracking tommand/tool, and you can define your own probes, what is a different story. I thought the probes can be used standalone, while in individual probe configuration you can add the host as well, and therefore the track-host is unneccesary for using probes. I was wrong. Now tTesting with track-host + probe setup.




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