Cisco IOS Carrier Ethernet Configuration Guide, Release 12.2SR - Configuring Remote Port Shutdown [Cisco IOS Software Releases 12.2 SR]

Table Of Contents

Configuring Remote Port Shutdown

Contents

Prerequisites for Configuring Remote Port Shutdown

Restrictions for Configuring Remote Port Shutdown

Information About Configuring Remote Port Shutdown

Ethernet Virtual Circuit

Ethernet LMI

OAM Manager

Benefits of Remote Port Shutdown

How to Configure Remote Port Shutdown

Specifying LDP as an OAM Protocol

Configuration Examples for Remote Port Shutdown

Specifying LDP As the OAM Protocol and Associating a Service Instance to an EVC: Example

Configuring Xconnect Directly on an Interface: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

Feature Information for Configuring Remote Port Shutdown

Configuring Remote Port Shutdown

First Published: February 27, 2007

Last Updated: February 27, 2007

The Remote Port Shutdown feature uses Ethernet Local Management Interface (LMI) in an Ethernet over Multiprotocol Label Switching (EoMPLS) network to propagate remote link status to a customer edge (CE) device.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Command Reference" section.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Prerequisites for Configuring Remote Port Shutdown

•Restrictions for Configuring Remote Port Shutdown

•Information About Configuring Remote Port Shutdown

•How to Configure Remote Port Shutdown

•Configuration Examples for Remote Port Shutdown

•Additional References

•Command Reference

•Feature Information for Configuring Remote Port Shutdown

Prerequisites for Configuring Remote Port Shutdown

•Ethernet LMI must be enabled for the Remote Port Shutdown feature to function.

Restrictions for Configuring Remote Port Shutdown

•Connectivity Fault Management and Lightweight Directory Protocol (LDP) cannot be configured at the same time.

Information About Configuring Remote Port Shutdown

To configure the Remote Port Shutdown feature, you should understand the following concepts:

•Ethernet Virtual Circuit

•Ethernet LMI

•OAM Manager

•Benefits of Remote Port Shutdown

Ethernet Virtual Circuit

An Ethernet virtual circuit (EVC) as defined by the Metro Ethernet Forum is a port level point-to-point or multipoint-to-multipoint Layer 2 circuit. EVC status can be used by a CE device to find an alternative path into the service provider network or in some cases, fall back to a backup path over Ethernet or over another alternative service such as Frame Relay or ATM.

Ethernet LMI

Ethernet LMI is an Ethernet Operations, Administration, and Maintenance (OAM) protocol between a CE device and a Provider Edge (PE) device. Ethernet LMI provides information that enables autoconfiguration of CE devices and provides the status of EVCs for large Ethernet metropolitan area networks (MANs) and WANs. Specifically, Ethernet LMI runs only on the PE-CE user network interface (UNI) link and notifies a CE device of both the operating state of an EVC and the time when an EVC is added or deleted. Ethernet LMI also communicates the attributes of an EVC.

Ethernet LMI interoperates with Ethernet Connectivity Fault Management (CFM) and LDP. In this case Ethernet LMI relies on the OAM manager to interwork with LDP to report remote link status to the local CE.

OAM Manager

The OAM manager is an infrastructure element that streamlines interaction between OAM protocols. The OAM manager requires two interworking OAM protocols, in this case Ethernet LMI and MPLS LDP.

No interactions are required between Ethernet LMI and the OAM manager on the CE side. On the user-facing provider edge (UPE) side, the OAM manager defines an abstraction layer that relays data collected from Ethernet CFM to the Ethernet LMI device.

Ethernet LMI and OAM manager interaction is unidirectional, from the OAM manager to Ethernet LMI on the UPE side of the device. An information exchange results from an Ethernet LMI request or is triggered by the OAM manager when the OAM manager receives notification from the OAM protocol that the EVC status has changed. In this case, the change is called a remote link status change.

Benefits of Remote Port Shutdown

The Remote Port Shutdown feature provides direct interaction of Ethernet LMI with MPLS, LDP, and OAM. When CFM/802.1ag is not running in a network, Remote Port Shutdown enables communication of link status to a CE, and traffic from the CE can be stopped if MPLS or the pseudowire is down. Figure 1 shows an EoMPLS network with the remote link down.

Figure 1 EoMPLS Network With the Remote PE-CE Link Down

How to Configure Remote Port Shutdown

Perform the following tasks to configure the Remote Port Shutdown feature:

•Specifying LDP as an OAM Protocol

Specifying LDP as an OAM Protocol

Perform this task to specify LDP as an OAM protocol.

SUMMARY STEPS

1. enable

2. configure terminal

3. ethernet evc evc-id

4. oam protocol {cfm svlan svlan-id domain domain-name | ldp}

5. end

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

ethernet evc evc-id
Example:

Router(config)# ethernet evc evc10

Defines an EVC and enters EVC configuration mode.

Step 4

oam protocol {cfm svlan svlan-id domain domain-name | ldp}
Example:

Router(config-evc)# oam protocol ldp

Configures either CFM or LDP as an OAM protocol.

•In this example, LDP is the protocol being configured.

Step 5

end
Example:

Router(config-evc)# end

Returns the CLI to privileged EXEC mode.

Configuration Examples for Remote Port Shutdown

This section provides the following configuration example:

•Specifying LDP As the OAM Protocol and Associating a Service Instance to an EVC: Example

•Configuring Xconnect Directly on an Interface: Example

Specifying LDP As the OAM Protocol and Associating a Service Instance to an EVC: Example

In this example, the OAM protocol for EVC pw_evc is specified as LDP, and service instance 1 is associated with the EVC.
Router(config)# ethernet evc pw_evc
Router(config-evc)# oam protocol ldp 
Router(config-evc)# uni count 2
Router(config-evc)# exit
Router(config)# pseudowire-class vlan-xconnect
Router(config-pw-class)# encapsulation mpls
Router(config-pw-class)# interworking
Router(config-pw-class)# exit
Router(config)# interface ethernet 0/0
Router(config-if)# ethernet lmi interface
Router(config-if)# ethernet uni id ce1
Router(config-if)# service instance 1 ethernet pw_evc
Router(config-if-srv)# encapsulation dot1q 2
Router(config-if-srv)# xconnect10.2.2.2 123 pw-class vlan-xconnect
Router(config_if-srv)# exit
Configuring Xconnect Directly on an Interface: Example

In this example, Xconnect is configured directly on an interface.
Router(config)# interface ethernet 0/0
Router(config-if)# xconnect 2.2.2.2 123 pw-class vlan-xconnect
Router(config-if)# ethernet lmi interface
Router(config-if)# ethernet uni id ce1
Router(config-if)# service instance 1 ethernet pw_evc
Router(config-if-srv)# encapsulation dot1q 2
Router(config_if-srv)# exit
Additional References

The following sections provide references related to configuring the Remote Port Shutdown feature.

Related Documents

Related Topic

Document Title

Ethernet CFM

"Configuring Ethernet Connectivity Fault Management in a Service Provider Network" in the Cisco IOS Carrier Ethernet Configuration Guide

Ethernet LMI

"Configuring Ethernet Local Management Interface" in the Cisco IOS Carrier Ethernet Configuration Guide

Configuring Ethernet LMI on a PE device

"Configuring Ethernet Local Management Interface at a Provider Edge" in the Cisco IOS Carrier Ethernet Configuration Guide

Ethernet over MPLS

Ethernet over MPLS for the Cisco 7600 Series Internet Routers

Standards

Standard

Title

IEEE P802.1ag/D5.2

Draft Standard for Local and Metropolitan Area Networks

IETF VPLS OAM

L2VPN OAM Requirements and Framework

ITU-T

ITU-T Y.1731 OAM Mechanisms for Ethernet-Based Networks

ITU-T Q.3/13

Liaison statement on Ethernet OAM (Y.17ethoam)

Metro Ethernet Forum 16 Technical Specification

Technical Specification MEF 16-Ethernet Local Management Interface

MIBs

MIB

MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

RFCs

RFC

Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/techsupport

Command Reference

The following commands are introduced or modified in the feature or features documented in this module. For information about these commands, see the Cisco IOS Carrier Ethernet Command Reference at http://www.cisco.com/en/US/docs/ios/cether/command/reference/
ce_book.html. For information about all Cisco IOS commands, use the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or a Cisco IOS master commands list.

•oam protocol

Feature Information for Configuring Remote Port Shutdown

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Table 1 Feature Information for Configuring Remote Port Shutdown

Feature Name

Releases

Feature Information

Remote Port Shutdown

12.2(33)SRB

The Remote Port Shutdown feature uses Ethernet LMI in an EoMPLS network to propagate remote link status to a CE device.

In Release 12.2(33)SRB, this feature was implemented on the Cisco 7600 router.

The oam protocol command was introduced in this feature.

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