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59-40
User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 59 Configuring Router Interfaces
SHDSL on Cisco IOS Routers
SHDSL on Cisco IOS Routers
Digital Subscriber Line (DSL) is a family of technologies that transports data over existing twisted-pair
copper wire. DSL uses frequencies that are beyond the upper list used by POTS (plain old telephone
service) to deliver broadband applications, such as multimedia and video, over the local loop (or last
mile) that connects the telephone company’s central office to customer sites.
Based on the International Telecommunications Union (ITU) G.991.2 global industry standard,
symmetric high-speed digital subscriber line (SHDSL) delivers symmetrical data rates from 192 up to
2.3 Mbps on a single wire pair. It transports many types of signals, such as T1, E1, ISDN, ATM, and IP.
In addition, the G.SHDSL signal has a greater distance reach from the central office than ADSL and
proprietary SDSL connections.
To configure SHDSL in Security Manager, do the following:
1. Configure the SHDSL controller. See Defining SHDSL Controllers, page 59-40.
2. Deploy the SHDSL policy. If ATM mode is activated, the router creates an ATM interface that
corresponds to the controller upon deployment. See Working with Deployment and the
Configuration Archive, page 8-26.
3. Rediscover the device to add the new ATM interface to Security Manager. See Discovering Policies
on Devices Already in Security Manager, page 5-15.
4. (Optional) Create one or more subinterfaces on the ATM interface. See Defining Basic Router
Interface Settings, page 59-3.
5. Configure PVCs on the ATM interface or subinterface. See Defining ATM PVCs, page 59-50.
Note If you perform discovery on the device, Security Manager populates the SHDSL policy with the
definition of the controller and the Interfaces policy with the ATM interface and subinterface. Any
discovered PVCs are added to the PVC policy.
Related Topics
• PVCs on Cisco IOS Routers, page 59-46
Defining SHDSL Controllers
When you configure an SHDSL controller in Security Manager, you must enter the name of the
controller that is installed in the Cisco IOS router. The following settings are then applied automatically:
• ATM mode is enabled.
• The line termination is set to CPE (customer premises equipment).
• The line mode is set to Auto.
You can optionally change the line termination to CO and specify the DSL mode and line mode. In
addition, you can define signal-to-noise ratio margins to improve line stability.
A Cisco IOS router may contain multiple SHDSL controllers. You may define only one SHDSL
definition per controller.