AudioCodes Mediant 500 E-SBC User Manual page 273

User's Manual
Parameter
Web: Proxy Keep Alive Time
EMS: Keep Alive Time
CLI: voip-network proxy-set >
proxy-keep-alive-time
[ProxySet_ProxyKeepAliveT
ime]
Web: Keep-Alive Failure
Responses
CLI: keepalive-fail-resp
[ProxySet_KeepAliveFailure
Resp]
Web: Proxy Load Balancing
Method
EMS: Load Balancing Method
CLI: voip-network proxy-set >
proxy-load-balancing-method
[ProxySet_ProxyLoadBalan
cingMethod]
Web/EMS: Is Proxy Hot Swap
CLI: voip-network proxy-set >
is-proxy-hot-swap
Version 6.8
balancing (configured by the 'Proxy Load Balancing Method'
parameter).
Notes:

For Survivability mode for User-type IP Groups, this parameter
must be enabled (1 or 2).

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 interval (in seconds) between Keep-Alive messages sent
by the device when the Keep-Alive mechanism is enabled.
The valid range is 5 to 2,000,000. The default is 60.
Note: This parameter is applicable only if the 'Enable Proxy Keep
Alive' parameter is set to Using Options.
Defines SIP response codes that if any is received in response to a
keep-alive message using SIP OPTIONS, the device considers the
Proxy as down.
Up to three response codes can be configured, where each code is
separated by a comma (e.g., 407,404). By default, no responses are
defined. If no responses are configured or responses received are
not those configured, the proxy is considered "alive".
Note: The SIP 200 response code is not supported by this feature.
Enables the Proxy Load Balancing mechanism per Proxy Set.

[0] Disable = Load Balancing is disabled (default)

[1] Round Robin = 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.

[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:

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.
Enables the Proxy Hot-Swap redundancy mechanism, which
provides real-time switching from the primary Proxy server to
redundant Proxies when no response is received from the primary.
273
17. Control Network
Description
Mediant 500 E-SBC