AudioCodes MP-11x User Manual page 211

User's Manual
Parameter
Web: Proxy Keep Alive
Time
EMS: Keep Alive Time
[ProxySet_ProxyKeepAl
iveTime]
Web: Proxy Load
Balancing Method
EMS: Load Balancing
Method
[ProxySet_ProxyLoadB
alancingMethod]
Version 6.6
defined interval (configured by the parameter ProxyKeepAliveTime). If set
to 'Using Register', the SIP REGISTER message is sent every user-
defined interval (configured by the RegistrationTime parameter). Any
response from the Proxy, either success (200 OK) or failure (4xx
response) is considered as if the Proxy is communicating correctly.
Notes:

This parameter must be set to 'Using Options' when Proxy redundancy
is used.

When this parameter is set to 'Using Register', the homing redundancy
mode is disabled.

When the active proxy doesn't respond to INVITE messages sent by
the device, the proxy is tagged as 'offline'. The behavior is similar to a
Keep-Alive (OPTIONS or REGISTER) failure.

If this parameter is enabled and the proxy uses the TCP/TLS transport
type, you can enable CRLF Keep-Alive mechanism, using the
UsePingPongKeepAlive parameter.
Defines the Proxy keep-alive time interval (in seconds) between Keep-
Alive messages.
The valid range is 5 to 2,000,000. The default is 60.
Note: This parameter is applicable only if the parameter
EnableProxyKeepAlive is set to 1 (OPTIONS). When the parameter
EnableProxyKeepAlive is set to 2 (REGISTER), the time interval between
Keep-Alive messages is determined by the RegistrationTime parameter.
Enables the Proxy Load Balancing mechanism per Proxy Set ID.

[0] Disable = Load Balancing is disabled (default)

[1] Round Robin

[2] 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
211
Description
17. Control Network
MP-11x & MP-124