> VLANs
> This chapter provides information on configuring an enhanced, or extended, service. The product administration guides provide examples and procedures for configuration of basic services on the system. It is recommended that you select the configuration example that best meets your service model before using the procedures in this chapter.
> Sections in this chapter include:

> • | Overview

> • | Creating VLAN Tags

> • | Configuring Subscriber VLAN Associations

> Overview
> Virtual LANs (VLANs) provide greater flexibility in the configuration and use of contexts and services.
> They are configured as “tags” on a per-port basis and allow more complex configurations to be implemented. The VLAN tag allows a single physical port to be bound to multiple logical interfaces that can be configured in different contexts. Therefore, each Ethernet port can be viewed as containing many logical ports when VLAN tags are employed.
> Important: VLANs are supported in conjunction with ports on the Ethernet 10/100 and 1000 line cards. (VLAN tagging is not supported for SPIO ports.) The system supports the configuration of VLANs as follows:

> • | Ethernet 1000 Line Card: 1024 VLANs per port.

> • | Ethernet 10/100 Line Card: Maximum of 256 VLANs per port and a maximum of 1017 tagged VLANs and 8 untagged VLANs per Line Card. (VLANs including tagged and/or untagged across all the ports of a single 10/100 Line Card can not be more than 1025.)

> This chapter includes the following procedures:

> • | Creating VLAN Tags

> • | Configuring Subscriber VLAN Associations

> Creating VLAN Tags
> Use the following example to create VLANs on a port and bind them to pre-existing interfaces. For information on creating interfaces, refer to the System Administration Guide.
> config
> port ethernet <slot/port>
> no shutdown
> vlan <vlan_tag_ID>
> no shutdown
> bind interface <interface_name> <context_name>
> end
> Notes:

> • | A maximum of 1024 VLANs can be configured per port.

> • | Configure a subscriber-vlan to associate a VLAN with specific subscribers. Refer to the Configuring Subscriber VLAN Associations section of this chapter for more information.

> • | Repeat this procedure as needed to configure additional VLANs for the port.

> Verify the port configuration
> Use the following command to verify the port configuration:
> show port info <slot/port>
> An example of this command’s output is shown below:
> Port: 17/1
> Port Type : 10/100 Ethernet
> Description : (None Set)
> Controlled By Card : 1 (Packet Accelerator Card)
> Redundancy Mode : Card Mode
> Redundant With : 33/1
> Physical ifIndex : 285278208
> Administrative State : Enabled
> Configured Duplex : Auto
> Configured Speed : Auto
> MAC Address : 00-05-47-01-11-00
> Link State : Up
> Link Duplex : Unknown
> Link Speed : Unknown
> Untagged:
> Logical ifIndex : 285278209
> Operational State : Down, Active
> Tagged VLAN: VID 10
> Logical ifIndex : 285278210
> VLAN Type : Subscriber
> Administrative State : Enabled
> Operational State : Up, Active
> Number of VLANs : 1
> Notes:

> • | Optional. Repeat this configuration as needed to configure additional ports.

> • | Optional. Configure VLAN-subscriber associations if needed.

> • | Save your configuration as described in Saving Your Configuration.

> Configuring Subscriber VLAN Associations
> Subscriber traffic can be routed to specific VLANs based on the configuration of their user profile. Using this functionality provides a mechanism for routing all traffic from a subscriber over the specified VLAN. All packets destined for the subscriber must also be sent using only IP addresses valid on the VLAN or they will be dropped.
> RADIUS Attributes Used
> The following RADIUS attributes can be configured within subscriber profiles on the RADIUS to allow the association of a specific VLAN to the subscriber:

> • | SN-Assigned-VLAN-ID : In the Starent VSA dictionary

> • | SN1-Assigned-VLAN-ID : In the Starent VSA1 dictionary

> Important: Since the instructions for configuring subscriber profiles differ between RADIUS server applications, this section only provides the individual attributes that can be added to the subscriber profile. Please refer to the documentation that shipped with your RADIUS server for instructions on configuring subscribers.
> Configuring Local Subscriber Profiles
> Use the configuration example below to configure VLAN associations within local subscriber profiles on the system.
> Important: These instructions assume that you have already configured subscriber-type VLAN tags according to the instructions provided in the Creating VLAN Tags section of this chapter.
> config
> context <context_name>
> subscriber name <user_name>
> ip vlan <vlan_id>
> end
> Verify the subscriber profile configuration
> Use the following command to view the configuration for a subscriber profile:
> show subscriber configuration username <user_name>
> Notes:

> • | Repeat this command for each additional subscriber.

> • | Save your configuration as described in Saving Your Configuration.

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