Vlans; Overview - Cisco ASR 5000 Administration Manual

VLANs

This chapter provides information on configuring virtual local area networks (VLANs) in support of enhanced
or extended services. The product administration guides provide examples and procedures for configuration
of services on the system that may utilize VLANs. You should select the configuration example that best
meets your service model before using the procedures described below.
Important
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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
VLAN – Layer 2 Traffic Management is a Cisco feature that requires a separate license. Contact your
Cisco account representative for detailed information on specific licensing requirements. For information
on installing and verifying licenses, refer to the Managing License Keys section of Software Management
Operations.
Overview, page 281
Creating VLAN Tags, page 283
Verifying the Port Configuration, page 283
Configuring Subscriber VLAN Associations, page 284
VLAN-Related CLI Commands , page 285
VLANs are supported in conjunction with subscriber traffic ports on Ethernet line cards. The system
supports the configuration limits for VLANs as described in Engineering Rules.
C H A P T E R
ASR 5000 System Administration Guide, StarOS Release 21.1
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