Sage-Tips

What is the maximum number of VLAN that can be configured on a switch?

4094 VLANs
Although you can specify up to 4095 VLANs, you can configure only 4094 VLANs. VLAN ID 4094 is reserved for use by the Single Spanning Tree feature. To increase the maximum number of VLANs you can configure, enter commands such as the following at the global CONFIG level of the CLI.

What is the maximum number of VLANs that can be configured on a switch supporting the IEEE 802.1Q protocol Why?

4,094
Under IEEE 802.1Q, the maximum number of VLANs on a given Ethernet network is 4,094 (4,096 values provided by the 12-bit VID field minus reserved values at each end of the range, 0 and 4,095).

How many VLANs ID are supported by a switch?

User-configured VLANs have unique IDs from 1 to 4094, except for reserved VLANs (see Table 17-1).

What is the maximum number of VLANs you are able to configure on the base Asa?

1024 VLANs
This means you can create way more than 4 security zones, depending on your ASA model you can create up to 1024 VLANs.

How many VLANs are usable?

You can use vlan-id up to and including 4094, but 4093 is the maximum number of vlans that can be configured.

What is the maximum number of usable VLANs that 802.1 Q supports?

The limit is 4,094 VLANS. Each VLAN requires an ID which is provided by the VID field as specified in the IEEE 802.1Q specification. The VID field is 12 bits providing a total of 4,096 combinations of which 0x000 and 0xFFF are reserved.

What is the maximum number of VLANs that can be configured on a switch supporting the 802.1 Q protocol hint a VLAN identifier is 12 bits?

12 bits used for the VLAN ID means that 4096 VLANs can theoretically be supported i.e. 2^12 = 4096. However, all 0s (0x000 in hexadecimal) and all 1s (0xFFF in hexadecimal) are reserved bringing the total supported VLANs to 4094. Note that network vendors may also implement their own VLAN ID restrictions.

What is the maximum number of VLANs that can be configured on a switch supporting the 802.1 Q protocol hint a VLAN identifier is 10 bits?

IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. Here the number of bits allocated for specifying is 12 Bits. So the theoretical maximum number of VLANs in the Ethernet standard is 2^12 = 4096.

How is VLAN configured?

Select Switching>VLAN>Basic > VLAN Configuration. From the VLAN menu, select the VLAN that you just created. In the IP address field, type the IP address that you want to assign to the VLAN routing interface. In the Subnet Mask field, type the subnet mask that you want to assign to the VLAN routing interface.

What is a VLAN number?

A VLAN represents a broadcast domain. VLANs are identified by a VLAN ID (a number between 0 – 4095), with the default VLAN on any network being VLAN 1. Each port on a switch or router can be assigned to be a member of a VLAN (i.e., to allow receiving and sending traffic on that VLAN).

What is the maximum number of VLANs that a Layer 2 switch can have?

How many VLANs can you have on a 24 port switch?

With 801.1aq tagging, the tag (SPBV) is expanded to 24 bit, so 16 million VIDs are possible. When trunking between devices you can have a single VLAN untagged, all others need to be tagged.