By default, the system allocates a block of 128 reserved VLANs (3968 to 4095) for these internal uses. You can change the range of reserved VLANs with the system vlan vlan-id reserve command. This allows you to set a different range of VLANs to be used as the reserved VLANs.. By default, the system allocates a block of 128 reserved VLANs (3968 to 4095) for these internal uses. You can change the range of reserved VLANs with the system vlan vlan-id reserve command. This allows you to set a different range of VLANs to be used as the reserved VLANs. The selected VLANs must be reserved in groups of 128.

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Hi, I'd like to know about the meaning of reserved vlan's (range:1006 to 1023), I have the following configuration: SW1# 1006 Online Diagnostic Vlan1 1007 Online Diagnostic Vlan2 1008 Online Diagnostic Vlan3 1009 Voice Internal Vlan 1011 Dtp Vlan. Beginning with Cisco release 5.2(1) for Cisco Nexus 7000 Series devices, VLANs 3968 to 4094 are reserved for internal use in each VDC by default. You can change the reserved VLANs to any other 128 contiguous VLAN range. When you reserve such a range, it frees up the range of VLANs that were allocated for internal use by default, and all of.