Changing the number of VLANs allowed on the switch

Syntax:

max-vlans 1-2048

In the default VLAN configuration, the switch allows a maximum of 256 VLANs. Use this command to specify the maximum VLANs to allow, and specify any value from 1 to 2048.

While IPv6 VLANs maximum is unchanged, the total number of allowed IPVLANs (IPv6 + IPv4) is 1024.

If GVRP is enabled, this setting includes any dynamic VLANs on the switch. As part of implementing a new setting, you must execute a write memory command to save the new value to the startup-config file, and then reboot the switch.

NOTE:

If multiple VLANs exist on the switch, you cannot reset the maximum number of VLANs to a value smaller than the current number of VLANs.

Attribute	MAX Number of VLANs
VLAN	4094
IP VLAN	1024 total with up to: 1024 IPv4 512 IPv6
Static routes	1024 total with up to: 256 interface-based 1024 gateway-based

Changing the number of allowed VLANs

Shows the command sequence for changing the number of VLANs allowed to 10. You can execute the commands to write memory and boot at another time.

switch(config)# max-vlans 10
This command will take effect after saving the configuration 
and rebooting the system.
switch(config)# write memory
switch(config)# boot
Device will he rebooted, do you want to continue [y/n]? Y

Error Messages

Error Message	Cause
The maximum number of IPv6 VLANs (512) has been reached.	When exceeding the maximum IPv6 VLANs allowed.
The maximum number of IP VLANs (1024) has been reached.	When exceeding the maximum IP VLANs allowed.

WARNING:

On configuring max-vlans > 2048, the following warning will be displayed:

switch(config)# max-vlans 4094
This command will take effect after saving the configuration and rebooting the system. A configuration with max-vlans greater than 2048 might prevent successful downgrade to previous software versions.