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DNS-SRV Registered Phones to Not Respond to Options Messages
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ldardini Offline
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Joined: Dec 2012
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Post: #5
RE: DNS-SRV Registered Phones to Not Respond to Options Messages
Hello Flora,
unfortunately the issue is not solved. I have upgraded the phone and then reset it. The phone is still not answering to OPTIONS messages. Is there a way I can help you solving the issue?

For a brief tcpdump I run, it seems the phone performs a DNS request for NAPTR once booted, then correctly the SRV request, but then make an A request to the DNS_SRV record provided that is not needed to be resolved. However, even by providing an A record for such entry, doesn't solve the issue.

21:38:38.368828 IP 192.168.2.104.1024 > 192.168.2.254.53: 2+ NAPTR? voip.domain.com. (39)
21:38:38.369346 IP 192.168.2.254.53 > 192.168.2.104.1024: 2 1/2/4 NAPTR (286)
21:38:38.374623 IP 192.168.2.104.1024 > 192.168.2.254.53: 2+ SRV? _sip._udp.voip.domain.com. (49)
21:38:38.375041 IP 192.168.2.254.53 > 192.168.2.104.1024: 2 2/2/2 SRV pbx2.domain.com.:5060 20 100, SRV pbx1.domain.com.:5060 10 100 (224)
21:38:38.379817 IP 192.168.2.104.1024 > 192.168.2.254.53: 2+ A? pbx1.domain.com. (40)
21:38:38.380185 IP 192.168.2.254.53 > 192.168.2.104.1024: 2 1/2/0 A xx.xx.xx.245 (115)
21:38:38.391439 IP 192.168.2.104.1024 > 192.168.2.254.53: 2+ A? pbx2.domain.com. (40)
21:38:38.391830 IP 192.168.2.254.53 > 192.168.2.104.1024: 2 1/2/0 A xx.xx.xx.182 (115)
21:38:39.080625 IP 192.168.2.104.1024 > 192.168.2.254.53: 2+ A? voip.domain.com. (39)
21:38:39.080982 IP 192.168.2.254.53 > 192.168.2.104.1024: 2 0/1/0 (108)
21:38:39.082650 IP 192.168.2.104.1024 > 192.168.2.254.53: 3+ A? voip.domain.com."dardini.it". (52)
21:38:39.083057 IP 192.168.2.254.53 > 192.168.2.104.1024: 3 NXDomain 0/1/0 (127)
21:38:39.085476 IP 192.168.2.104.1024 > 192.168.2.254.53: 4+ A? voip.domain.com. (39)
21:38:39.085737 IP 192.168.2.254.53 > 192.168.2.104.1024: 4 0/1/0 (108)
21:38:39.087533 IP 192.168.2.104.1024 > 192.168.2.254.53: 5+ A? voip.domain.com."dardini.it". (52)

Leandro
12-11-2012 04:56 AM
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RE: DNS-SRV Registered Phones to Not Respond to Options Messages - ldardini - 12-11-2012 04:56 AM

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