Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
vlan internal allocation policy
vlan internal alloca tion policy
To configure the internal VLAN allocation scheme, use the vlan internal allocation policy command.
To return to the default setting, use the no form of this command.
vlan internal allocation policy {ascending | descending}
no vlan internal allocation policy
Syntax Description
Defaults The default is the ascending allocation scheme.
Command Modes Global configura tion mode
Usage Guidelines You can configure internal VLAN allocation t o be from 1006 and up or from 40 94 and down.
The internal VLANs and use r-configured VLANs sh are the 1006 to 4094 VLAN spa ces. A “ first com e,
first served” policy is used in allocating these spaces.
The vlan internal a llocation poli cy command allows you to configure the allocation direction of the
internal VLAN.
During system bootup, the interna l VLANs that are required for features in the startup- config file are
allocated first. The user-configured VLANs in the startup-config file are configured next. If you
configure a VLAN that conflicts with an existing internal VLAN, the VLAN that you configured is put
into a nonoperational status until the internal VLAN is freed and becomes available.
After you enter the write mem command and the system reloads, the reconfigured allocation scheme is
used by the port manager.
Examples This exampl e shows how to c onfigure the VLANs in a descendi ng order as the inter nal VLAN all ocation
policy:
Switch(config)# vlan internal allocation policy descending
Switch(config)#
Related Commands
ascending Specifies to allocate internal VLANs from 1006 to 4094.
descending Specifies to allocate internal VLANs from 4094 to 1006.
Command Description
show vlan internal usage Displays information about the internal VLAN allocation.