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4-52 41-001343-02 REV04 – 05.2014
RPORT
The Session Initiation Protocol (SIP) operates over UDP and TCP. When used with UDP, responses to requests are returned
to the source address from which the request came, and returned to the port written into the topmost “Via” header of
the request. However, this behavior is not desirable when the client is behind a Network Address Translation (NAT) or
firewall.
A parameter created for the “Via” header called “Rport” in RFC 3581, allows a client to request that the server send the
response back to the source IP address and the port from which the request came.
When you enable “Rport, the phone always uses symmetric signaling (listens on the port used for sending requests.)
An Administrator can configure “Rport” using the configuration files or the Aastra Web UI.
To set VLAN ID and priority for the PC Port (Port 1):
7. Enter a VLAN ID value from 1 to 4095 in the VLAN ID field. Default is 4095.
Note:
Setting the PC Port VLAN ID to 4095 and LAN Port VLAN ID to any ID from 1 to 4094 will allow frames from the LAN port (containing a VLAN
ID) to be untagged before being forwarded to the PC port and frames from the PC port (without a VLAN ID) to be tagged with the configured
VLAN ID before being forwarded to the LAN port.
Example:
You enable tagging on the phone port as normal but set the PC Port VLAN ID to 4095 and the LAN Port VLAN ID to any ID from 1 to 4094. The
following example sets the LAN port to be on VLAN 3 but the PC port is configured as untagged.
8. Select a VLAN priority value from 0 to 7 for the PC Port in the Priority field. Default is 0.
9. Click Save Settings to save your settings.
Note:
Configuring the Rport parameter is recommended for clients behind a Network Address Translation (NAT) or firewall
since this parameter allows a client to request that the server send the response back to the source IP address and the
port from which the request came.
Aastra Web UI