Different Cisco Catalyst switches support different numbers of VLANs. The number of supported VLANs is enough to accommodate the requirements of nearly all organizations. The Catalyst 2960 and 3560 Series switches support VLANs over 4,000. The Normal VLANs ID range from 1 to 1,005 and extended-range VLANs are from 1,006 to 4,094. The figure below illustrates the normal range of VLANs on a Cisco switch. The small and medium-sized business and enterprise network used a normal range of VLANs.
Normal VLANs Range
- The normal range VLAN ID is between 1 and 1005.
- IDs 1002 through 1005 reserved for Token Ring and FDDI VLANs.
- The automatically created VLANs (1, 1002, 1003, 1004, 1005) cannot remove.
- VLAN database file (vlan.dat) store VLAN configurations. The vlan.dat file is in the flash memory of the switch.
- The VTP (VLAN Trunking Protocols) helps to manage VLAN configurations between switches. The VTP can only learn and store normal range VLANs.
Extended VLANs Range
- The extended VLANs range enables service providers to extend their infrastructure to a greater number of customers.
- The VLAN ID is between 1006 and 4094.
- The default store place for extended range configurations is running configurations file instead of the vlan.dat file.
- Support fewer VLAN features than normal range of VLANs.
- VTP not working with extended range VLANs.