AudioCodes Mediant 800B - Page 387

Version 7.2 387 Mediant 800B Gateway & E-SBC
User's Manual 17. Control Network
Parameter Description
DNS Resolve Method
dns-resolve-method
[ProxySet_DNSResolveMetho
d]
Defines the DNS query record type for resolving the proxy server's
host name (FQDN) into an IP address(es).
 [-1] = Not configured. DNS resolution method is according to the
settings of the global parameter, ProxyDNSQueryType.
 [0] A-Record = (Default) DNS A-record query is used to resolve
DNS to IP addresses.
 [1] SRV = If the proxy address is configured with a domain name
without a port (e.g., domain.com), an SRV query is done. The
SRV query returns the host names (and their weights). The
device then performs DNS A-record queries per host name
(according to the received weights). If the configured proxy
address contains a domain name with a port (e.g.,
domain.com:5080), the device performs a regular DNS A-record
query.
 [2] NAPTR = NAPTR query is done. If successful, an SRV query
is sent according to the information received in the NAPTR
response. If the NAPTR query fails, an SRV query is done
according to the configured transport type. If the configured proxy
address contains a domain name with a port (e.g.,
domain.com:5080), the device performs a regular DNS A-record
query. If the transport type is configured for the proxy address, a
NAPTR query is not performed.
 [3] Microsoft Skype for Business = SRV query as required by
Microsoft when the device is deployed in a Microsoft Skype for
Business environment. The device sends a special SRV query to
the DNS server according to the transport protocol configured in
the 'Transport Type' parameter (described later in this section):

TLS: "_sipinternaltls_tcp.<domain>" and
"_sip_tls.<domain>". For example, if the configured domain
name (in the 'Proxy Address' parameter) is "ms-server.com",
the device queries for "_sipinternaltls_tcp.ms-server.com"
and "_sip_tls.ms-server.com".

TCP: "_sipinternal._tcp.<domain>" and "_sip_tcp.<domain>".

Undefined: "_sipinternaltls_tcp.<domain>",
"_sipinternal_tcp.<domain>", "_sip_tls.<domain>" and
"_sip_tcp.<domain>".
The SRV query returns the host names (and their weights). The
device then performs DNS A-record queries per host name
(according to the received weights) to resolve into IP addresses.
Note: An SRV query can return up to four host names. For each
host name, the subsequent DNS A-record query can resolve into up
to 15 IP addresses. However, the device supports up to 30 DNS-
resolved IP addresses. If the device receives more than this number
of IP addresses, it uses the first 30 IP addresses in the received list
and ignores the rest.
Proxy Address Table
Index
proxy-ip-index
[ProxyIp_ProxyIpIndex]
Defines an index number for the new table row.
Note: Each row must be configured with a unique index.
Proxy Address Defines the address of the proxy.
Up to 10 addresses can be configured per Proxy Set. The address