AudioCodes Mediant 800B User Manual page 218

Parameter
Web: Proxy Load Balancing
Method
EMS: Load Balancing
Method
[ProxySet_ProxyLoadBala
ncingMethod]
Web/EMS: Is Proxy Hot-
Swap
[ProxySet_IsProxyHotSwa
p]
Web/EMS: Redundancy
Mode
[ProxySet_ProxyRedunda
ncyMode]
User's Manual
parameter for the Gateway/IP-to-IP application or
SBCProxyRegistrationTime parameter for the 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
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.
Enables the Proxy Hot-Swap redundancy mode.

[0] No (default)

[1] Yes
If Proxy Hot-Swap is enabled, the SIP INVITE/REGISTER message is
initially sent to the first Proxy/Registrar server. If there is no response
from the first Proxy/Registrar server after a specific number of
retransmissions (configured by the parameter HotSwapRtx), the
message is resent to the next redundant Proxy/Registrar server.
Determines whether the device switches back to the primary Proxy
after using a redundant Proxy.

[-1] Not configured = (Default) The global parameter,
ProxyRedundancyMode applies.

[0] Parking = The device continues operating with a redundant
(now active) Proxy until the next failure, after which it operates with
the next redundant Proxy.

[1] Homing = The device always attempts to operate with the
primary Proxy server (i.e., switches back to the primary Proxy
whenever it's available).
218
Mediant 800B GW & E-SBC
Description
Document #: LTRT-10274