How does this monitor probe command works ? How many pings sends this command and how many ping it should lose to make the dialpeer down. When this probe cannot ping the addres is this dial-peer goes to down status ? But if we have many dial-peers is it useful to make a lot of pings to the destination ?
dial-peer voice 2000 voip description VOIP Peer to NYC preference 1 destination-pattern 20.. monitor probe icmp-ping 172.16.1.2 session protocol sipv2 session target ipv4:172.16.1.2 dtmf-relay rtp-nte codec g722-64
This command monitors the configured IP addr through icmp pings.
This should be used in conjunction with the fallback command to implement SRST.
The results of the probe will determine if the GW goes into SRST mode if the faqllback command is configured,
by itself, I don't think this command will work correctly.
The principal use of this command is to specify ICMP ping as the probe method, even though the option for selecting RTR is also available.
In order for the monitor probe icmp-ping command to work properly, the call fallback icmp-ping command or the call fallback active command must be configured. One of these two commands must be in effect before the monitor probe icmp-ping command can be used.
If the call fallback icmp-ping command is not entered, the call fallback active command in global configuration is used for measurements. If the call fallback icmp-ping command is entered, these values override the global configuration.
Then you don't need this at all just have 2 voip dial-peers that match the same pattern but set the order you want them to match with the preference command - if the first one fails, it will send the call to the next dial peer configured for that pattern.
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