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ip sla cisco

There are 3 cisco looking to the Internet and, accordingly, the  same number of channels to different ISPs.

There is also a fourth cisco (which will look inside the  server), I would like to configure it so that it gave priority to access

- First through one provider,

- If there is no connection to it through the second,

- And, if not both of the above via a third

Is it possible to organize the tracks so when you  consider that the fourth cisco does not look to the 'Net, but it should  be able to ping through 3 channels a specific host on the Internet. Appropriate settings for 3 shuttles made (open  pings).

Below 4 th config cisco:

ip sla 1

icmp-jitter  77.77.77.77 source-ip 10.10.10.1 num-packets 5

ip sla schedule 1 life forever start-time now

ip sla 2

icmp-jitter  77.77.77.77 source-ip 10.10.10.2 num-packets 5

ip sla schedule 2 life forever start-time now

ip sla 3

icmp-jitter  77.77.77.77 source-ip 10.10.10.3 num-packets 5

ip sla schedule 3 life forever start-time now

ip route 0.0.0.0 0.0.0.0 10.10.10.1 10 track 1

ip route 0.0.0.0 0.0.0.0 10.10.10.1 20 track 2

ip route 0.0.0.0 0.0.0.0 10.10.10.1 30 track 3

track 1 ip sla 1

track 2 ip sla 2

track 3 ip sla 3

Podozervayu  put wrong ip LAS.

sh track shows a  timeout on all channels.

Question  is - can a cisco check the status of the communication channel if it is  connected not directly to the provider?

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