04-12-2012 08:46 AM - edited 03-17-2019 11:03 PM
In a dial-peer, can the session target support an SRV record, instead of an ip or
a regular DNS entry. Nothing in the documentaion I've seen, shows anything about
it.
We want to provide failover, in the case our first voice switch is down, and have the calls
routed to the second switch.
04-12-2012 04:33 PM
Hi,
Are you using ISDN, SIP or H323?
Regards,
04-13-2012 08:33 AM
Sorry, SIP only.
04-13-2012 09:19 AM
Take a look at the configuration below:
SIP
---
call fallback icmp-ping
call fallback active
dial-peer voice 1 voip
destination pattern 1000
session target ipv4:10.0.1.1
session protocol sipv2
monitor probe icmp-ping
dial-peer voice 2 voip
destination pattern 1000
session target ipv4:(second server ip address)
session protocol sipv2
monitor probe icmp-ping
preference 1
What this does is that before sending the call signaling it probes for Ip connectivity.
If the server does not respond it will try to reach the server on dial-peer 2 and so on (if you had more dial-peers)
Also take a look at the following link:
10-29-2014 07:25 PM
I would avoid DNS dependency...this had a very negative effect on recent customer.
PRIx7> 2951x2-SIP Trunk> CCM> 28xx FXS-MGCP or VG224-MGCP> Fax
The customer was experiencing significant delay (6-8min) of CNG tone delivery towards 500+ fax environment. Removed the DNS dependency with 3 SIP dial-peers referencing CCM IP's....CNG tone arrived in less than 10secs. They've been chasing this issue for 1.5yrs...
05-02-2012 06:22 PM
Yes Greg. SRV is the default - if you set the dialpeer to use DNS, SRV will be used.
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