Use this control to configure TCP Fallback settings.
The SBC supports, by default, 1,300 Maximum Transmission Unit (MTU) bytes, and the MTU size used by the SBC is configurable. If the initial INVITE message size exceeds the default MTU value, the SBC sends the data over the TCP transport protocol. The TCP transport protocol is used if it is allowed by the transport profile irrespective of its preference order.
The current TCP Fallback feature does the following:
% set addressContext <name> zone <name> sipTrunkGroup <name> signaling TCPFallback maxMTUSupportedOverUDPControl <disabled | enabled> maxMTUSupportedOverUDPValue <1-5000>
TCP Fallback Parameters
Parameter | Length/ Range | Description |
---|---|---|
maxMTUSupportedOverUDPControl | N/A | Maximum MTU Size accepted over UDP.
|
maxMTUSupportedOverUDPValue | 1-5000 | Maximum size of the SIP Invite accepted over UDP. (default = 1300). |