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DNS Records Required by Access Edge Server

The following DNS SRV records are required by the Access Edge Server:

·         If you are enabling public IM connectivity or enhanced federation, an external SRV record for all edge servers that points to _sipfederationtls._tcp.contoso.com over port 5061 (where contoso.com is the name of the SIP domain of this organization). This SRV record should point to an A record with the external FQDN of the Access Edge Server that resolves to the VIP on the external load balancer that is used by the Access Edge Servers. In this example, because there is only one SIP domain, only one SRV record like this is needed. If you have multiple SIP domains, you need a DNS SRV record for each. This is required only if you are enabling enhanced federation or public IM connectivity.

·         A DNS SRV (service location) record for _sip._tls.contoso.com over port 443 where contoso.com is the name of your organization’s SIP domain. This SRV record must point to an A record with the external FQDN of the Access Edge Server that resolves to the VIP on the external load balancer used by the Access Edge Servers. If you have multiple SIP domains, you need a DNS SRV record for each. This SRV record supports automatic configuration for remote users for instant messaging and conferencing.

The following external DNS A records are required.

·         ExternalAccessLB.contoso.com resolves to the VIP of the external load balancer in the perimeter network used by the Access Edge Servers. It is used by external clients and other Access Edge Servers to reach the Access Edge Server from the Internet.

·         An external A record for sip.ExternalAccessLB.contoso.com that points to the VIP address used by the Access Edge Servers on the external load balancer in the perimeter network. (One A record for each SIP domain).

·         ExternalWebLB.contoso.com resolves to the VIP address used by the Web Conferencing Edge Servers on the external load balancer in the perimeter network.

·         ExternalAVLB.contoso.com resolves to the VIP address used by the A/V Edge Servers on the external load balancer in the perimeter network.

The following internal DNS A records are required.

·         InternalAccessLB.corp.contoso.com, points to the VIP of the internal load balancer in the perimeter network used by the Access Edge Servers.

·         InternalAVLB.corp.contoso.com, points to the VIP of the internal load balancer in the perimeter network used by the A/V Edge Servers.

·         InternalLB.corp.contoso.com points to the VIP of the load balancer of the Enterprise pool to which the internal A/V Conferencing Servers and Web Conferencing Servers are attached.

·         SrvrA.corp.contoso.com points to the internal interface of Web Conferencing Edge Server on Server A

·         SrvrB.corp.contoso.com points to the internal interface of Web Conferencing Edge Server on Server B 

 

 
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