Nortel business policy switch 2000, User Manual

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Chapter 2 Network configuration 111
Using the Business Policy Switch 2000 Version 2.0
Figure 17 Port-based VLAN example
IEEE 802.1Q tagging
Business Policy Switches operate in accordance with the IEEE 802.1Q tagging
rules. Important terms used with the 802.1Q tagging feature are:
• VLAN identifier (VID)—the 12-bit portion of the VLAN tag in the frame
header that identifies an explicit VLAN. When other types of VLANs are
enabled, this default value can be overridden by the values enabled in the
management interfaces. Refer to Chapter 3,
Using Web-based Management
for the Business Policy Switch 2000 Software Version 2.0, Reference for the
Business Policy Switch 2000 Command Line Interface Software Version 2.0,
and Reference for the Business Policy Switch 2000 Management Software
Version 2.0 for information on overriding the default values.
• Port VLAN identifier (PVID)—a classification mechanism that associates a
port with a specific VLAN. For example, a port with a PVID of 3 (PVID =3)
assigns all untagged frames received on this port to VLAN 3.
With software version 1.1, you can automatically assign the PVIDs.
• Tagged frame—the 32-bit field (VLAN tag) in the frame header that identifies
the frame as belonging to a specific VLAN. Untagged frames are marked
(tagged) with this classification as they leave the switch through a port that is
configured as a tagged port.
Business
Policy Switch
2000
VLAN 1 VLAN 2
9798EA