Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 9 – Cluster name and DNS SRV records
Cisco VCS Deployment Guide: Cluster creation and maintenance (Cisco VCS X7.0.n)
Page 58 of 63
_sip._tcp.<fully.qualified.domain>
T150 version L6.0 supports:
_sip._tls.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
C-Series versions prior to TC4.0 supports:
_sip._tls.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
C-Series from version TC4.0 supports:
_sips._tcp.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
Cisco TelePresence MCU supports:
_sips._tcp.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
SIP DNS SRV records required:
_sips._tcp.<fully.qualified.domain> Movi (4.0 and later), C-Series (TC4.0 and later), Cisco VCS,
MCU
MCU
_sips._tls.<fully.qualified.domain> E20 to TE2.1
_sip._tls.<fully.qualified.domain>
MXP to F8.2, T150 to L6.0, Movi prior to 4.0, C-Series prior to
TC4.0
_sip._tcp.<fully.qualified.domain>
All products for TCP
Note:
UDP is not a good transport medium for video signaling – SIP messaging for video systems is
too large to be carried on a packet based (rather than stream based) transport. UDP is often
used for audio only devices.
too large to be carried on a packet based (rather than stream based) transport. UDP is often
used for audio only devices.
_sip._tls,<fully.qualified.domain> is an SRV record also used by Microsoft OCS Edge servers.
Looking up .SRV records
Nslookup
nslookup -query=SRV _sip._tcp.example.com
Dig
dig _sip._tcp.example.com SRV
; <<>> DiG 9.4.1 <<>> _sip._tcp.example.com SRV
;; global options: printcmd