CHAPTER 6
Implementing Multipoint Layer 2 Services
This module provides the conceptual and configuration information for Multipoint Layer 2 Bridging Services,
also called Virtual Private LAN Services (VPLS).
VPLS supports Layer 2 VPN technology and provides transparent multipoint Layer 2 connectivity for customers.
This approach enables service providers to host a multitude of new services such as broadcast TV and Layer
2 VPNs.
Note
For Point to Point Layer 2 Services, see Implementing Point to Point Layer 2 Services chapter.
For descriptions of the commands listed in this module, see the “Related Documents” section. To locate
documentation for other commands that might appear while executing a configuration task, search online in
the Cisco IOS XR software master command index.
Feature History for Implementing Multipoint Layer 2 Services
ModificationRelease
This feature was introduced.Release 3.7.2
These features were added:
• Blocking unknown unicast flooding.
• Disabling MAC flush.
• Multiple Spanning Tree Access Gateway
• Scale enhancements were introduced. See Table
1 for more information on scale enhancements.
Release 3.9.0
Support for VPLS with BGP Autodiscovery and LDP
Signaling was added.
Release 3.9.1
Support was added for the following features:
• Dynamic ARP Inspection
• IP SourceGuard
• MAC Address Security
Release 4.0.1
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
201
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