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Cisco IOS Voice, Video, and Fax Commands: R Through Sh
session transport
VR-616
Cisco IOS Voice, Video, Fax Command Reference
session transport
To configure the VoIP dial peer to use TCP or User Datagram Protocol (UDP) as the underlying transport
layer protocol for Session Initiation Protocol (SIP) messages, use the session transport command in
dial-peer configuration mode. To reset the value to the default, use the no form of this command.
session transport {udp | tcp }
Syntax Description
Defaults The SIP dial peer uses UDP.
Note The transport protocol specified with the transport command and the one specified with the session
transport command must be the same.
Command Modes Dial-peer configuration
Command History
Usage Guidelines Use show sip-ua status to ensure that the transport protocol that you set using the session transport
command matches the protocol set using the transport command.
Examples The following example shows a VoIP dial peer configured to use UDP as the underlying transport
layer protocol for SIP messages:
dial-peer voice 102 voip
session transport udp
udp Configure the SIP dial peer to use the UDP transport layer protocol. This
is the default.
tcp Configure the SIP dial peer to use the TCP transport layer protocol.
Release Modification
12.1(1)T This command was introduced on the Cisco 2600 series and Cisco 3600
series routers and on the Cisco AS5300 universal access server.