11 Deploy the SBC Cluster
Last updated
Last updated
If your business handles a high volume of WebRTC and MS Teams calls, or if you use an SBC to isolate your PBX, all calls will be routed through the SBC. In such cases, it is recommended to deploy the SBC in a cluster configuration to efficiently manage the call traffic.
As illustrated in the diagram, the PBX is deployed on either a VLAN or a cloud platform. Multiple SBC servers are positioned in front of the PBX to prevent direct access by users.
You will need to create DNS records for each SBC server. The DNS records can be of the following types:
A Record
DNS SRV Record
For example, assume the SBC servers have the following IP addresses:
SBC 1: 72.247.113.11
SBC 2: 72.247.113.12
SBC 3: 72.247.113.13
You can create the following A Records for the SBC servers:
Resolve sbc1.sbc.com to 72.247.113.11
Resolve sbc2.sbc.com to 72.247.113.12
Resolve sbc3.sbc.com to 72.247.113.13
Additionally, you may create records to resolve sbc.com to all three SBC IPs:
Resolve sbc.com to 72.247.113.11
Resolve sbc.com to 72.247.113.12
Resolve sbc.com to 72.247.113.13
Please purchase a wildcard TLS certificate for the domain sbc.com as per the article Certificates for TLS/HTTPS/WebRTC guide.
Please follow the instructions in the Configuring PortSIP SBC for WebRTC topic to set up each SBC server. However, keep the following points in mind:
When adding certificates to the SBC, set the TLS domain to sbc.com and enable the This is SBC Web Domain Certificate option.
When configuring the Web Domain for the SBC, enter sbc.com for the Web Domain field.
After completing the setup of the SBC servers, you can access the SBC Web Portal using the following URLs:
To manage SBC 1, use https://sbc1.sbc.com:8883
To manage SBC 2, use https://sbc2.sbc.com:8883
To manage SBC 3, use https://sbc3.sbc.com:8883
You can access the WebRTC client using this URL: https://sbc.com:10443/webrtc.
