Prerequisites For Configuring Vlans - Cisco Nexus 9000 Series Configuration Manual

Prerequisites for Configuring VLANs

Product
Cisco NX-OS
Prerequisites for Configuring VLANs
VLANs have the following prerequisites:
• You must be logged onto the device.
• You must create the VLAN before you can do any modification of that VLAN.
Guidelines and Limitations for Configuring VLANs
VLANs have the following configuration guidelines and limitations:
• show commands with the internal keyword are not supported.
• You can configure a single VLAN or a range of VLANs.
• You cannot create, modify, or delete any VLANs that are within the group of VLANs reserved for
• VLAN1 is the default VLAN. You cannot create, modify, or delete this VLAN.
• VLANs 1006 to 3967 are always in the active state and are always enabled. You cannot suspend the
• When the spanning tree mode is changed, the Layer 3 subinterface VLANs that share the same VLAN
• VLANs 3968 to 4095 are reserved for internal device use by default.
• When VLANs are configured to have vn-segments, QOS/ACL/SPAN are not supported on FEX HIFs.
Default Settings for VLANs
This table lists the default settings for VLAN parameters.
Cisco Nexus 9000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
22
When you configure a large number of VLANs, first create the VLANs using the vlan command (for
example, vlan 200-300, 303-500). After the VLANS have been successfully created, name or configure
those VLANs sequentially.
internal use.
state or shut down these VLANs.
IDs with Layer 2 VLANs might be affected by a few micro-seconds of traffic drops as a result of the
hardware re-programming.
License Requirement
VLANs require no license. Any feature not included
in a license package is bundled with the Cisco NX-OS
system images and is provided at no extra charge to
you.
Configuring VLANs