Avaya Nortel Communication Server 1000 Manual page 188

188 Features
Configure the p bits
By default, the 3-bit field p bits are set to 110b (6), which is the value
recommended by Nortel. The p bit value can be changed using either TM
or Element Manager. Two fields in TM 3.1 and Element Manager are used
to set the p bits:
1. A check box that, when selected, means the priority bits must be set to
2. A 802.1Q priority bit value field. This field sets the value that the IP
Configure the VOICE and DATA VLAN ID
The VOICE VLAN ID and DATA VLAN ID fields can be specified on a per
interface basis and are global settings. This means that all voice packets
transmitted by the IP Phone have the same VOICE VLAN ID and all data
packets have the same DATA VLAN ID. Though only one network interface
exists on the IP Phone, the IP Phone has two internal ID: one for voice traffic
and one for data traffic. The IP Phone firmware can detect and route the
voice and data traffic.
If a DATA VLAN is enabled, the IP Phone adds the DATA VLAN ID to
untagged traffic. However, if the traffic arriving on the PC port is already
tagged, the frame passes through unchanged.
The VLAN ID is specified as follows:
•
•
•
For more information about manual or automatic IP Phone configuration,
see IP Phones Fundamentals (NN43001-368).
The following describes the IP Phone support for 802.1Q.
Step
1
2
Copyright © 2003–2008, Nortel Networks
.
the value specified by the 802.1Q priority bit value field. If the check box
is not selected, the IP Phone sends out the default priority of 6.
Phones sends out. The range is 0 to 7.
The default VLAN ID is 000 (hex).
The VOICE and DATA VLAN ID can be specified during a manual
configuration of the IP Phone using the IP Phone keypad, or
automatically retrieved using DHCP (automatic VLAN discovery).
In the case of the VOICE VLAN ID, the VOICE VLAN ID can also be
configured by the DHCP parameter when using the Automatic VLAN ID
configuration using DHCP approach.
Action
If 802.1Q is disabled, standard Ethernet frames are transmitted.
If 802.1Q is enabled, all frames transmitted by the Ethernet driver
have the 802.1Q tag bytes inserted between the source MAC
address and the protocol type field. The tag protocol identifier field
contains 8100 (hex) and the CFI bit is set to 0.
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008