AudioCodes Mediant 1000 User Manual page 87

SIP User's Manual
Parameter
Proxy Load Balancing
Method
[ProxyLoadBalancing
Method]
Proxy IP List Refresh
Time
[ProxyIPListRefreshTi
me]
Version 5.2
Table 5-9: Proxy & Registration Parameters
Enables the usage of the Proxy Load Balancing mechanism.
[0] Disable = Load Balancing is disabled (default).
[1] Round Robin = Round Robin.
[2] Random Weights = Random Weights.
When Round Robin (1) algorithm is used, a list of all possible Proxy IP
addresses is compiled. This list includes all entries in the ProxyIP table after
necessary DNS resolutions (including NAPTR and SRV, if configured). This
list can handle up to 15 entries.
After this list is compiled, the Proxy Keep-Alive mechanism (according to
EnableProxyKeepAlive and ProxyKeepAliveTime) is used to mark each
entry as Offline or Online. The balancing is only performed on Proxy servers
that are marked as Online.
All outgoing messages are equally distributed across the Proxy IP list.
REGISTER messages are also distributed unless a RegistrarIP is
configured.
The Proxy IP 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 Random Weights (2) 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 gateway sends the requests in such
a fashion that each Proxy receives a percentage of the requests according
to its assigned weight.Only single FQDN should be configured as a Proxy IP
address. The Random Weights Load Balancing is not used in the following
scenarios:
The ProxyIP table includes more than one entry.
The only Proxy defined is an IP address and not an FQDN.
SRV usage is not enabled (DNSQueryType).
The SRV response includes several records with a different Priority
value.
Defines the time interval (in seconds) between refreshes of the Proxy IP list.
This parameter is used only when ProxyLoadBalancingMethod = 1.
The interval range is 5 to 2,000,000. The default interval is 60.
Description
87
5. Web-based Management
September 2007