Manual
Table Of Contents
- Preface
- Introduction
- Process Summary
- Prerequisites
- Run the Service Setup Wizard
- VCS System Configuration
- Routing Configuration
- Pre-search Transforms
- Search Rules
- Task 8: Configuring Transforms
- Task 9: Configuring Local Zone Search Rules
- Task 10: Configuring the Traversal Zone
- Neighboring Between VCS Clusters
- Task 11: Configuring Traversal Zone Search Rules
- Task 12: Configuring the DNS Zone
- Task 13: Configuring DNS Zone Search Rules
- Task 14: Configuring External (Unknown) IP Address Routing
- Endpoint Registration
- System Checks
- Maintenance Routine
- Optional Configuration Tasks
- Appendix 1: Configuration Details
- Appendix 2: DNS Records
- Appendix 3: Firewall and NAT Settings
- Appendix 4: Advanced Network Deployments
- Obtaining Documentation and Submitting a Service Request
- Cisco Legal Information
- Cisco Trademark
Appendix 2: DNS Records
DNS Configuration on Host Server
The following records are required in the external DNS which hosts the externally routable domain (example.com).
This allows:
■ External endpoints registration messages to be routed to the VCS Expressway.
■ Calls from non-registered endpoints (or other infrastructure devices) to be routed to the VCS Expressway.
Host DNS A Record
Host Host IP address
vcse.example.com 192.0.2.2
DNS SRV Records
Name Service Protocol Priority Weight Port Target host
example.com. h323cs tcp 10 10 1720 vcse.example.com.
example.com. h323ls udp 10 10 1719 vcse.example.com.
example.com. h323rs udp 10 10 1719 vcse.example.com.
example.com. sip tcp 10 10 5060 vcse.example.com.
example.com. sip udp * 10 10 5060 vcse.example.com.
example.com. sips tcp 10 10 5061 vcse.example.com.
example.com. turn udp 10 10 3478 ** vcse.example.com.
* SIPUDPis disabled on VCS by default.
** On Large VCS deployments you should configure multiple records for the range 3478 – 3483.
For example, the DNS records would be:
_h323cs._tcp.example.com. 86400 IN SRV 10 10 1720 vcse.example.com.
_h323ls._udp.example.com. 86400 IN SRV 10 10 1719 vcse.example.com.
_h323rs._udp.example.com. 86400 IN SRV 10 10 1719 vcse.example.com.
_sip._tcp.example.com. 86400 IN SRV 10 10 5060 vcse.example.com.
_sip._udp.example.com. 86400 IN SRV 10 10 5060 vcse.example.com.
_sips._tcp.example.com. 86400 IN SRV 10 10 5061 vcse.example.com.
_turn._udp.example.com. 86400 IN SRV 10 10 3478 vcse.example.com.
vcse.example.com. 86400 IN A 192.0.2.2
If you have a cluster of VCS Expressways, you must set up DNSAand SRV records for each peer/host in the cluster.
See VCS Cluster Creation and Maintenance Deployment Guide for more information.
DNS Configuration (internal DNS server)
The following records are required in the local DNS which hosts the internally routable domain: internal-domain.net
to allow internal messages to be routed to the VCS Control.
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Cisco VCS Expressway and VCS Control - Basic Configuration Deployment Guide
Appendix 2: DNS Records