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Command

Purpose

Step 1

[node](act)[RULE]# condition ip

<routername:interfacename> { LINKUP |

LINKDOWN }

Defines the condition under which the

action has to be executed.

[node](act)[RULE]# condition sip <gateway:

gatewayname> { REGISTERED | NOT_

REGISTERED }

Defines the condition under which the

action has to be executed.

SIP supports TCP flows according to RFC5626

First appeared in build series: 2012-12-03

SmartWare supports the „User Agent Procedures‟ described in RFC5626 with the exception of „Keep-

Alive with STUN‟. Registrations can now open a TCP flow to the registrar and keep it open through CRLF

keep-alive or other messages. Through that flow calls can traverse through NAT and reach the registered

user. Together with this addition some of the older nat-traversal and keep-alive capabilities were

extended too. A summary is provided here of all nat-traversal commands for registrations and calls.

Registration nat-traversal disabled

When nothing is configured all nat-traversal procedures are disabled. With this command a configured

nat-traversal mode can be removed and the normal registration behavior is restored.

Mode: registration outbound

Command

Purpose

Step 1

[node](regout)# no nat-traversal

Disables nat-traversal procedures.

Default: disabled.

Registration nat-traversal mode: minimal (new)

In nat-traversal mode minimal the goal is to register the globally accessible NAT address, but without

having an additional keep-alive mechanism. This could be the case when the registrar server has such a

mechanism, the NAT does not need such or the registration lifetime is short enough that the keep-alive is

done with the REGISTER requests.

In this mode a REGISTER request is first sent with the local IP address as contact and the „rport‟ option.

If that request results in a successful answer the „received‟ and „rport‟ parameters are examined to detect

the globally accessible IP address and port. With these correct parameters a second REGISTER request

with the corrected contact header is then sent to the registrar.

Mode: registration outbound

Command

Purpose

Step 1

[node](regout)# nat-traversal minimal

Activate nat-traversal without keep-alive.

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Zeck Audio STAC Force180 Guide d'installation Page 25

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