AudioCodes Mediant 4000 SBC User Manual page 472

CHAPTER 20 SIP Definitions
Parameter
'Registrar Search Mode'
registrar-search-mode
[Account_
RegistrarSearchMode]
Description
■ [1] Enable = Enables the Register Stickiness feature.
The device always routes SIP requests of a registered
Account to the same registrar server to where the last
successful REGISTER request was routed. In other
words, once initial registration of the Account to one of
the IP addresses in the Proxy Set (associated with the
Account's Serving IP Group) is successful (i.e., 200
OK), binding ("stickiness") occurs to this specific
address (registrar). All future SIP requests (e.g.,
INVITEs, SUBSCRIBEs and REGISTER refreshes)
whose source and destination match the Account are
sent to this registrar only. This applies until the registrar
is unreachable or registration refresh fails, for whatever
reason
■ [2] Enable for Non-REGISTER Requests = Enables
the Register Stickiness feature, as described for the
Enable option (above), except for refresh REGISTER
messages. When the device initiates a refresh
REGISTER message for the Account, it restarts the
registration process for the Account, sending the
message to one of the registrar servers according to the
Proxy Set of the Account's Serving IP Group. This
option can used, for example, in scenarios where proxy
keep-alive is disabled (see the 'Proxy Keep-Alive'
parameter in the Proxy Sets table) and restart of
registration for refresh REGISTERs is always
preferred.
Note: The parameter is applicable only if you have enabled
Account registration ('Register' parameter configured to
Regular or GIN).
Defines the method for choosing an IP address (registrar) in
the Proxy Set (associated with the Serving IP Group) to
which the Account initially registers and performs
registration refreshes, when the Register Stickiness
feature is enabled. Once chosen, the Account is binded to
the IP address for subsequent SIP requests.
■ [0] Current Working Server = (Default) For each initial
and refresh registration request, the device routes to the
currently working server in the list of IP addresses
(configured or DNS-resolved IP addresses) in the Proxy
Set. In the case of proxy load-balancing, the chosen IP
address is according to the load-balancing mechanism.
- 439 -
Mediant 4000 SBC | User's Manual