AudioCodes Mediant 2000 User Manual page 105

SIP User's Manual
Parameter
Transport Type
[ProxyIp_TransportType]
Web: Proxy Load Balancing
Method
EMS: Load Balancing Method
[ProxyLoadBalancingMethod]
Version 5.8
Notes:

If EnableProxyKeepAlive is set to 1 or 2, the device monitors
the connection with the Proxies by using keep-alive messages
(OPTIONS or REGISTER).

To use Proxy Redundancy, you must specify one or more
redundant Proxies.

When a port number is specified (e.g., domain.com:5080), DNS
NAPTR/SRV queries aren't performed, even if
ProxyDNSQueryType is set to 1 or 2.
The transport type per Proxy server.

[0] UDP

[1] TCP

[2] TLS

[-1] = Undefined
Note: If no transport type is selected, the value of the global
parameter SIPTransportType is used (refer to ''Configuring SIP
General Parameters'' on page
Enables the Proxy Load Balancing mechanism per Proxy Set ID.

[0] Disable = Load Balancing is disabled (default).

[1] Round Robin = Round Robin.

[2] Random Weights = Random Weights.
When the Round Robin algorithm is used, a list of all possible
Proxy IP addresses is compiled. This list includes all IP addresses
per Proxy Set, after necessary DNS resolutions (including NAPTR
and SRV, if configured). After this list is compiled, the Proxy Keep-
Alive mechanism (according to parameters EnableProxyKeepAlive
and ProxyKeepAliveTime) 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 addresses list is refreshed according to
ProxyIPListRefreshTime. If a change in the order of the entries in
the list occurs, all load statistics are erased and balancing starts
over again.
When the Random Weights algorithm is used, the outgoing
requests are not distributed equally among the Proxies. The
weights are received from the DNS server by 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. The Random Weights Load Balancing is not used in the
following scenarios:

The Proxy Set includes more than one Proxy IP address.

The only Proxy defined is an IP address and not an FQDN.

SRV is not enabled (DNSQueryType).

The SRV response includes several records with a different
Priority value.
105
3. Web-Based Management
Description
99 ).
October 2009