Cisco Catalyst 2000 Configuration Handbook page 110

Table 6-1 Configurable VLAN Parameters
Parameter
name
mtu
state
a. Create a VLAN in the standard range:
(global) vlan vlan-id [name vlan-name] [state {suspend | active}] [mtu
mtu-size]
The vlan-id specifies the VLAN by number. You can create VLANs in global
configuration mode if the switch is in VTP transparent mode. To do this, enter
the vlan vlan-id command to move to vlan-config mode. From vlan-config mode,
you can manage the parameters of the VLANs.
Note You cannot modify any of the parameters for VLAN 1.
b. Create a VLAN in the extended range.
Extended VLANs support VLANs up to 4096 in accordance with the 802.1Q
standard.
Enable spanning-tree MAC reduction:
3.
(global) vlan internal allocation policy descending
You can instruct the Catalyst 6500 series switch to start to borrow VLANs from the
top, and descend from 4096, or from bottom, and ascend from 1006, with the use
the global config mode vlan allocation policy command.
Chapter 6: VLANs and Trunking 89
Description
A description of the VLAN up to 32 charac-
ters. If none is given, it defaults to
VLAN00XXX, where XXX is the VLAN
number.
The maximum transmission unit (packet size in
bytes) that the VLAN can use; valid values are
from 576 to 18190. The MTU can extend up
to 1500 for Ethernet, but beyond for Token
Ring or FDDI. The default is 1500.
Used to specify whether the state of the
VLAN is active or suspended. All ports in a
suspended VLAN will be suspended and not
allowed to forward traffic. The default state is
active.