Aastra Telecom 480I CT manual Dscp Range/VLAN Priority Mapping

IP Phone Administrator Guide Advanced Network Settings

Configuring the IP Phones

Notes:

1. In order for the software to successfully maintain connectivity with a network using VLAN functionality, the IP phone reboots if you modify the "tagging enabled" (VLAN enable in the Web UI), "VLAN id", or "VLAN id port 1" parameters.

2.The "QoS eth port 0 priority" and "QoS eth port smp priority" parameters were applicable to software release 1.3.1 and earlier. They have no affect in software Release 1.4 and up.

3.When the Port 0 "VLAN id" and the Port 1 "VLAN id port 1" parameters have the same value, VLAN functionality is compatible with earlier IP phone software releases.

DSCP Range/VLAN Priority Mapping

DSCP bits in the ToS field of the IP header are set for RTP, RTCP, and SIP packets using either the default values or the values configured via the "tos sip", "tos rtp", and "tos rtcp" parameters.

When the VLAN global configuration parameter, "tagging enabled" is set to 1, VLAN priority for IP packets is mapped to the DSCP value instead of a single priority for all packets. An administrator can also configure VLAN priority for non-IP packets using the "priority non-ip" parameter.

Since the default DSCP settings for SIP, RTP, and RTCP are 24, 32, and 32 respectively, this results in corresponding default VLAN priorities of 3 for SIP, 4 for RTP, and 4 for RTCP (based on the settings in the table “DSCP Range/VLAN Priority” on page 4-25).

You can change the default parameters by modifying just the DSCP values, just the VLAN priority values, or by modifying all values.

The following table shows the DSCP range/VLAN piority mapping.

4-24 41-001129-00 Rev 09, Release 1.4.1