API Guide

VLAN ACLs get exhausted. If the VLAN ACL creation fails, it results in VLAN creation failure. As a result, there cannot be more
than 256 VLANs in Fabric mode.
When a VLAN is created with the uplink ports, a traffic class such as gold, silver, or platinum is assigned to the traffic on the
VLAN. On receiving the configuration from GUI through DNV, the Fabric agent creates a classmap of type qos with the name
CM<vlanid> which matches the same <vlanid>. For example when vlanid 100 with a traffic class of type 4 the classmap created
will be:
classmap type qos CM100
match vlan 100
A single policymap is created to hold all the VLAN classmaps and its applied at the system qos level which gets applied to all the
interfaces.
policymap type qos PM_VLAN
class CM100
set qos-group 4
Any addition, deletion, or modification to the VLAN or the traffic class happens within the same policymap.
In the NPU, each classmap maps to an ACL entry in the L2QOS region matching the vlanid in the classmap.
Constraints
VLAN scaling is limited to the Fabric mode.
Currently Dynamic ARP Inspection (DAI) uses the vlan-group id. NAS implicitly programs the VLAN-group id in the Vlan table.
But DAI feature is not enabled in Fabric mode.
Use of vlan-group id is limited only to applications which require grouping for the purpose of using ACLs.
VLAN commands
description (VLAN)
Adds a description to the selected VLAN.
Syntax
description description
Parameters description — Enter a text string to identify the VLAN. A maximum of 80 characters.
Default Not configured
Command Mode INTERFACE-VLAN
Usage
Information
None
Example
OS10(conf-if-vlan)# description vlan3
Supported
Releases
10.2.0E or later
interface vlan
Creates a VLAN interface.
Syntax
interface vlan vlan-id
Parameters vlan-id — Enter the VLAN ID number, from 1 to 4093.
Default VLAN 1
Command Mode CONFIGURATION
Usage
Information
FTP, TFTP, MAC ACLs, and SNMP operations are not supported. IP ACLs are supported on VLANs only.
The no version of this command deletes the interface.
Layer 2 515