AudioCodes Mediant 800 - Page 418

CHAPTER18 Core Entities
Mediant 800 Gateway & E-SBC | User's Manual
Parameter Description
■ [0] Disable = After a successful initial registration of
the user to a registrar, whenever the device receives
a SIP request or registration refresh from the user,
the device sends the request to whichever registrar
(IP address of the Proxy Set) is currently active. In
the case of proxy load-balancing, there is no
certainty to which IP address the request is routed.
■ [1] Enable = The device always routes SIP requests
(INVITEs, SUBSCRIBEs and REGISTER
refreshes) received from the user to the same
registrar server to which the last successful
REGISTER request for that user was routed. In
other words, once initial registration of the user to
one of the IP addresses of the Proxy Set associated
with this destination Server-type IP Group is
successful (i.e., 200 OK), binding occurs to this
specific address (registrar) and all future SIP
requests from the user are routed (based on matched
routing rule) only to this specific registrar.
Note:
■ The parameter is applicable only to Server-type IP
Groups
■ The Proxy Set associated with the Server-type IP
Group must be configured with multiple IP addresses
(or an FQDN that resolves into multiple IP
addresses).
■ This feature is also applicable to IP Group Sets (see
Configuring IP Group Sets). If a user is bound to a
registrar associated with this Server-type IP Group
which also belongs to an IP Group Set, IP Group Set
logic of choosing an IP Group is ignored and instead,
the device always routes requests from this user to
this specific registrar.
■ A user's "stickiness" to a specific registrar ends
upon the following scenarios:
✔ If you modify the Proxy Set.
✔ If the Proxy Set is configured with an FQDN and
a DNS resolution refresh removes the IP
address to which the user is bound.
✔ User registration expires or the user initiates an
unregister request.
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