Vlan Ids - 3Com corebuilder 3500 Implementation Manual

160 C 9: V
HAPTER IRTUAL

VLAN IDs

LAN
S
Each VLAN is identified by its VLAN ID (VID). For VLANs that you create,
the system keeps track of its used VLAN ID numbers to help you select
the next available VLAN ID. Outgoing data frames are tagged per
IEEE 802.1Q (which specifies the VID) if tagging is enabled on the
transmit port for that VLAN. Tagged IEEE 802.1Q data frames that are
received on the system are assigned to the VLAN that corresponds to
both the VID contained in the tag and the protocol type.
Be aware of these additional guidelines:
The default VLAN always uses the reserved VID of 1.
Before you assign a VID, review the information in Table 15.
Table 15 Assigning ID Numbers to VLANs
VLAN ID
Number
VID 1
VID 4095
VID 2–4094
If you rely on dynamic configuration to create a port-based VLAN
based on GVRP updates, the VID is the unique IEEE 802.1Q VID.
When you define a router port IP interface, the system automatically
creates a router port IP VLAN and assigns it the next available VID. See
Chapter 11 for information on router port IP interfaces.
Description
Reserved for the default VLAN assigned by IEEE and
3Com Corporation
Reserved
Numbers that you assign when you create VLANs