Nortel 1110 User Guide
Appendix B: 802.1Q VLAN description
Page 515 of 630
IP Phones
Description, Installation, and Operation
The following functions are available on the three-port switch:
•
hardware VLAN filter
•
two TX (out) queues on each port —High Priority Queue (HPQ) and
Low Priority Queue (LPQ)
Low Priority Queue (LPQ)
Therefore, traffic other than Voice VLAN can be filtered by enabling the
VLAN filtering feature and taking advantage of the hardware VLAN filter.
Voice traffic is always queued to the HPQ thereby providing a higher quality
of service.
VLAN filtering feature and taking advantage of the hardware VLAN filter.
Voice traffic is always queued to the HPQ thereby providing a higher quality
of service.
VLAN IDs
The VOICE and DATA VLAN ID fields can be specified on a per interface
basis. There is only one network interface on the IP Phone; however, the
IP Phone has two internal IDs, one for voice and one for data traffic. The
IP Phone firmware can detect and route the voice and data traffic.
basis. There is only one network interface on the IP Phone; however, the
IP Phone has two internal IDs, one for voice and one for data traffic. The
IP Phone firmware can detect and route the voice and data traffic.
The VLAN ID fields are global settings. That is, all voice packets transmitted
by the IP Phone have the same VOICE VLAN ID. If DATA VLAN is
enabled, the IP Phone will add the DATA VLAN ID to untagged traffic.
However, if the traffic arriving on the PC port is already tagged, the frame
will pass through unchanged.
by the IP Phone have the same VOICE VLAN ID. If DATA VLAN is
enabled, the IP Phone will add the DATA VLAN ID to untagged traffic.
However, if the traffic arriving on the PC port is already tagged, the frame
will pass through unchanged.
Each VLAN ID is specified as follows:
•
The default VLAN ID is 000 (hex).
•
The VOICE and DATA VLAN IDs can be specified in the manual
configuration user interface.
configuration user interface.
•
Or, 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
discovery using DHCP approach.
be configured by the DHCP parameter when using the Automatic VLAN
discovery using DHCP approach.
Automatic VOICE VLAN ID configuration
As part of the 802.1Q feature, there is an option to automatically discover the
VOICE VLAN ID using DHCP. This process reduces the configuration steps
since entering data manually (the VOICE VLAN ID) is not required.
VOICE VLAN ID using DHCP. This process reduces the configuration steps
since entering data manually (the VOICE VLAN ID) is not required.