Reuse MAC for ATM Route-Bridge Encapsulation [Support]

Table Of Contents

Reuse MAC for ATM Route-Bridge Encapsulation

Finding Feature Information

Contents

How to Configure Reuse MAC for ATM Route-Bridge Encapsulation

Configuration Examples for Reuse MAC for ATM Route-Bridge Encapsulation

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for Reuse MAC for ATM Route-Bridge Encapsulation

Reuse MAC for ATM Route-Bridge Encapsulation

First Published: March 19, 2010

Last Updated: March 19, 2010

When multiple hosts are connected to the Customer Premises Equipment (CPE) that in turn communicate to the Internet Service Provider (ISP) through the Broadband Remote Access Server (BRAS), the hosts are connected to the CPE through Ethernet and legacy ATM between the CPE and the BRAS, and aggregation using DSL Access Multiplexer (DSLAM).

In a standard setup, hosts are connected to the BRAS through sub-interfaces. A host sends a DHCP request to get its IP address from the DHCP server (can be the BRAS), and when the IP address is assigned, the packets start flowing with the IP. The ATM interface in the CPE is configured with Route-Bridge Encapsulation (RBE) to enable packets from the hosts to be bridged across the ATM connection as shown in Figure 1.

Figure 1 Sample Topology for Reuse MAC for ATM Route-Bridge Encapsulation

The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single virtual circuit (VC) on each sub-interface that connects each subscriber to the ISP.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for Reuse MAC for ATM Route-Bridge Encapsulation" section.

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

•How to Configure Reuse MAC for ATM Route-Bridge Encapsulation

•Configuration Examples for Reuse MAC for ATM Route-Bridge Encapsulation

•Additional References

•Feature Information for Reuse MAC for ATM Route-Bridge Encapsulation

How to Configure Reuse MAC for ATM Route-Bridge Encapsulation

The Reuse MAC for ATM Route-Bridge Encapsulation configuration is available only in the ATM point-to-point sub-interface mode. Only physical Ethernet interfaces can be used as client interfaces whose MAC address can be used for the ATM P2P sub-interface.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface atm slot/port

4. atm ether-mac-address interface interface-name

5. atm ether-mac-address mac-address

6. end

7. show running interface atm slot/port

8. exit

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

interface atm slot/port
Example:

Router(config)# interface atm 1/0.1

Specifies the ATM interface to be configured and enters ATM point-to-point sub-interface mode, where:

•slot/port—Specifies the location of the interface

Step 4

atm ether-mac-address interface-name
Example:

Router(config-subif)# atm ether-mac-address interface fastEthernet 0/0

Specifies the interface name whose MAC address can be used to configure the ATM point-to-point sub-interfaces. This is option 1, skip step 5 if you prefer to specify the interface name and not the MAC address.

Note Step 4 and step 5 are exclusive of each other.

Step 5

atm ether-mac-address mac-address
Example:

Router(config-subif)# atm ether-mac-address 00a1.0b65.87bc

Specifies the user defined or explicit MAC address that can be used to configure the ATM point-to-point sub-interfaces. This is option 2, skip step 4 if you prefer to specify the MAC address and not the interface name.

Note Step 4 and step 5 are exclusive of each other.

Step 6

end
Example:

Router(config-subif)# end

Returns to the privileged EXEC mode.

Step 7

show running interface atm slot/port
Example:

Router# show running interface atm0/0.000

Displays the configuration.

Configuration Examples for Reuse MAC for ATM Route-Bridge Encapsulation

The following example shows how to configure the Reuse MAC for ATM Route-Bridge Encapsulation feature using an interface:
Router> enable
Router# configure terminal
Router(config)# interface atm 3/0.100 point-to-point
Router(config-subif)# atm ether-mac-address interface fastEthernet 0/0
Router(config-subif)# end
The following example shows how to configure the Reuse MAC for ATM Route-Bridge Encapsulation feature using an MAC address for the ATM point-to-point sub-interface:
Router> enable
Router# configure terminal
Router(config)# interface atm 3/0.100 point-to-point
Router(config-subif)# atm ether-mac-address 00a1.0b65.87bc
Router(config-subif)# end

3. You can use the show run interface atm slot/port command to display the configuration:
Router# show run interface atm0/0.000
Current configuration : 188 bytes
!
interface ATM3/0.100 point-to-point
 atm route-bridged ip
 atm ether-mac-address interface FastEthernet0/0
 no atm enable-ilmi-trap
 pvc 1/100 
 !
end
Additional References

The following sections provide references related to the Reuse MAC for ATM Route-Bridge Encapsulation feature.

Related Documents

Related Topic

Document Title

Configuring ATM

Configuring ATM

ATM commands

Cisco IOS Asynchronous Transfer Mode Command Reference

Standards

Standard

Title

No new or modified standards are supported by this feature.

—

MIBs

MIB

MIBs Link

None

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.

—

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/cisco/web/support/index.html

Feature Information for Reuse MAC for ATM Route-Bridge Encapsulation

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 Reuse MAC for ATM Route-Bridge Encapsulation

Feature Name

Releases

Feature Information

Reuse MAC for ATM Route-Bridge Encapsulation

15.1(1)T

The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single VC on each sub-interface that connects each subscriber to the ISP.

This feature was introduced in Cisco IOS RElease 15.1(1)T. The following commands were introduced: atm ether-mac-address.

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