AudioCodes Mediant 3000 User Manual page 218

Parameter
Web: Proxy Keep Alive Time
EMS: Keep Alive Time
[ProxySet_ProxyKeepAliveT
ime]
Web: Proxy Load Balancing
Method
EMS: Load Balancing Method
[ProxySet_ProxyLoadBalan
cingMethod]
SIP User's Manual

[2] Using Register = Enables Keep-Alive with Proxy using SIP
REGISTER messages.
If set to 'Using Options', the SIP OPTIONS message is sent every
user-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 for the GW/IP2IP application or by the
SBCProxyRegistrationTime parameter for SBC application). Any
response from the Proxy, either success (200 OK) or failure (4xx
response) is considered as if the Proxy is communicating correctly.
Notes:

For Survivability mode for USER-type IP Groups, this parameter
must be enabled (1 or 2).

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. This parameter is configured per Proxy Set.
The valid range is 5 to 2,000,000. The default value 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 parameter
RegistrationTime for the GW/IP2IP application or by the
SBCProxyRegistrationTime parameter for SBC application.
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
218
Description
Document #: LTRT-89712
Mediant 3000