Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 2 – DNS records configuration
Cisco VCS Basic Configuration (Control with Expressway) Deployment Guide
Page 52 of 69
Appendix 2 – DNS records configuration
DNS configuration on host server
The following records are required to be configured in the external DNS which hosts the externally routable
domain: example.com to allow:
domain: example.com to allow:
n
external endpoints registration messages to be routed to the VCS Expressway
n
calls from non-registered endpoints (or other infrastructure devices) to be routed to the VCS Expressway
Host DNS A record
Host
TTL
Type
Data
vcse.example.com
86400
A
192.0.2.2
DNS SRV records
Service
Protocol
Host
Port
Notes
h323cs
tcp
_h323cs._tcp.example.com
1720
h323ls
udp
_h323ls._udp.example.com
1719
sip
tcp
_sip._tcp.example.com
5060
sip
udp
_sip._udp.example.com
5060
sips
tcp
_sips._tcp.example.com
5061
sips
tls
_sips._tls.example.com
5061
For E20 TE2.1
sip
tls
_sip._tls.example.com
5061
For MXP F8.2, T150 L6.0, Movi prior to
version 3.1
version 3.1
turn
udp
_turn._udp.example.com
3478
Should match port setting on
VCS
configuration > Expressway > TURN
For each DNS SRV record the following values are common:
Name
example.com
TTL
86400
Type
SRV
Priority
10
Weight
10
Target
vcse.example.com.
DNS configuration (internal DNS server)
The following records are required to be configured in the local DNS which hosts the internally routable
domain: internal-domain.net to allow internal endpoints registration messages to be routed to the VCS
Control.
domain: internal-domain.net to allow internal endpoints registration messages to be routed to the VCS
Control.