AudioCodes Mediant 3000 User Manual page 360

Parameter
Proxy Load Balancing
Method
[ProxySet_ProxyLoad
BalancingMethod]
DNS Resolve Method
[ProxySet_DNSResolv
eMethod]
User's Manual
Notes:

To enable this functionality, you must also enable the Proxy Keep-Alive
feature (see the 'Proxy Keep-Alive' parameter in this table).

The Homing option can only be used if the 'Proxy Keep-Alive' parameter
is set to Using Options.
Enables load balancing between proxy servers of the Proxy Set.

[0] Disable = (Default) Disables proxy load balancing.

[1] Round Robin = A list of all possible proxy IP addresses is compiled.
This list includes all IP addresses of the Proxy Set after DNS resolutions
(including NAPTR and SRV, if configured). After this list is compiled, the
Proxy Keep-Alive feature (enabled by the 'Proxy Keep-Alive' and 'Proxy
Keep-Alive Time' parameters in this table) tags each entry as "offline" or
"online". Load balancing is only performed on proxy servers that are
tagged as "online". All outgoing messages are equally distributed across
the list of IP addresses. REGISTER messages are also distributed unless
a RegistrarIP is configured. The IP address list is refreshed every user-
defined interval (see the ProxyIPListRefreshTime parameter). If a change
in the order of the IP address entries in the list occurs, all load statistics
are erased and balancing starts over again.

[2] Random Weights = The outgoing requests are not distributed equally
among the Proxies. The weights are received from the DNS server, using
SRV records. The device sends the requests in such a fashion that each
proxy receives a percentage of the requests according to its' assigned
weight. A single FQDN should be configured as a proxy IP address.
Random Weights Load Balancing is not used in the following scenarios:

More than one IP address has been configured for the Proxy Set.

The proxy address is not configured as an FQDN (only IP address).

SRV is disabled (see the DNSQueryType parameter).

The SRV response includes several records with a different Priority
value.
Defines the DNS query record type for resolving the proxy server's host
name (FQDN) into an IP address(es).

[-1] = 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] MS-Lync = SRV query as required by Microsoft when the device is
deployed in a Microsoft Lync 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
Description
360
Mediant 3000
Document #: LTRT-89730