(Answer) (Category) SIP FAQ : (Category) SIP Protocol Operation :
What do I need to do to use SRV records?
Any bind implementation after 4.9.5 supports SRV records, as does Windows 2000.
  _sip._tcp         SRV 0 0 5060 sip-server.cs.columbia.edu.
                    SRV 1 0 5060 backup.ip-provider.net.
  _sip._udp         SRV 0 0 5060 sip-server.cs.columbia.edu.
                    SRV 1 0 5060 backup.ip-provider.net.
DNS SRV records are supported by BIND 4.9.6 and newer, generally installed as named. Configuring named for Linux is discussed in a HOWTO at http://www.linuxdoc.org/HOWTO/DNS-HOWTO.html
Currently registered SRV records: 
  sip.tcp.cs.columbia.edu SRV     0 0 5060 erlang.cs.columbia.edu
  sip.udp.sip-happens.com SRV     0 0 5060 sip.sip-happens.com
Use, for example, 
  host -v -t srv sip.tcp.cs.columbia.edu
  host -v -t srv sip.udp.cs.columbia.edu
  host -v -t srv _sip._udp.cs.columbia.edu

[Append to This Answer]
hgs@cs.columbia.edu
2001-Mar-22 12:03am
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