AudioCodes Mediant 800B MSBR User Manual page 811

Mediant 800B MSBR
Parameter
Web: Proxy DNS Query Type
CLI: proxy-dns-query
[ProxyDNSQueryType]
Web/EMS: Use Gateway Name for
OPTIONS
CLI: use-gw-name-for-opt
[UseGatewayNameForOptions]
Version 6.8
performed. The device uses the first host name received
from the SRV query. The device then performs a DNS A-
record query for the host name to locate an IP address.

[2] NAPTR = An NAPTR query is performed. If it is
successful, an SRV query is sent according to the
information received in the NAPTR response. If the NAPTR
query fails, an SRV query is performed according to the
configured transport type.
Notes:

If the Proxy/Registrar IP address parameter, the domain
name in the Contact/Record-Route headers, or the IP
address configured in the routing tables contain a domain
name with a port definition, the device performs a regular
DNS A-record query.

If a specific Transport Type is configured, a NAPTR query is
not performed.

To enable NAPTR/SRV queries for Proxy servers only, use
the global parameter ProxyDNSQueryType, or use the
proxy Set table.
Global parameter that defines the DNS query record type for
resolving the Proxy server's configured domain name (FQDN)
into an IP address.

[0] A-Record (default) = A-record DNS query.

[1] SRV = If the Proxy IP address parameter contains a
domain name without port definition (e.g., ProxyIP =
domain.com), an SRV query is performed. The SRV query
returns up to four Proxy host names and their weights. The
device then performs DNS A-record queries for each Proxy
host name (according to the received weights) to locate up
to four Proxy IP addresses. Thus, if the first SRV query
returns two domain names and the A-record queries return
two IP addresses each, no additional searches are
performed.

[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
Proxy IP address parameter contains a domain name with
port definition (e.g., ProxyIP = domain.com:5080), the
device performs a regular DNS A-record query. If a specific
Transport Type is defined, a NAPTR query is not
performed.
Notes:

This functionality can be configured per Proxy Set in the
Proxy Set table (see ''Configuring Proxy Sets'' on page
282).

When enabled, NAPTR/SRV queries are used to discover
Proxy servers even if the parameter DNSQueryType is
disabled.
Determines whether the device uses its IP address or string
name ("gateway name") in keep-alive SIP OPTIONS messages
(host part of the Request-URI). The "gateway name" is
configured using the SIPGatewayName parameter. The device
811
67. Configuration Parameters Reference
Description
Mediant 800B MSBR