Nortel 2001 Installation And Operation Manual page 355

Appendix B: 802.1Q VLAN description
• 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.
• When 802.1Q is enabled, the configuration of separate voice and data
VLANs is possible. Each VLAN has its own ID and priority on the IP
Phone. Voice messages have the priority bits of all frames set to 6 (octal)
and the VOICE VLAN ID is set to 000 (hex) by default. Data messages
have the priority bits of all frames set to 0 and the DATA VLAN ID is
set to 000 (hex) by default. The GUI and TPS configured values override
these values.
• The IP Phone's Ethernet driver receives any Ethernet frame destined for
it, regardless of whether 802.1Q is enabled or whether the received frame
is an 802.1Q tagged frame.
Note: The only exception is any 802.1Q tagged frame with the CFI = 1.
In this case the frame is discarded.
• The IP Phone's Ethernet driver strips the 802.1Q tag information from
the frame prior to passing it on to the IP stack.
• The IP Phone's Ethernet driver filters packets by the VLAN tag and
MAC address. Tagged traffic is prioritized and routed based on the
priority bits.
For more information on configuring 802.1Q on an IP Phone 2001, see
"First-time installation" on
For more information on configuring 802.1Q on an IP Phone 2002, see
"First-time installation" on
For more information on configuring 802.1Q on an IP Phone 2004, see
"First-time installation" on
For more information on configuring 802.1Q on the IP Phone 2007, see
"First-time installation" on
page 40.
page 73.
page 108.
page 150.
IP Phones Description, Installation, and Operation
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