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CHAPTER
12-1
ATM Switch Router Software Configuration Guide
OL-7396-01
12
Using Access Control
This chapter describes how to configure and maintain access control lists, which are used to permit or
deny incoming calls or outgoing calls on an interface of the ATM switch router.
Note This chapter provides advanced configuration instructions for the Catalyst 8540 MSR,
Catalyst 8510 MSR, and LightStream 1010 ATM switch routers. For complete descriptions of the
commands mentioned in this chapter, refer to the ATM Switch Router Command Reference publication.
This chapter includes the following sections:
• Access Control Overview, page 12-1
• Configuring a Template Alias, page 12-2
• Configuring ATM Filter Sets, page 12-3
• Configuring an ATM Filter Expression, page 12-5
• Configuring ATM Interface Access Control, page 12-6
• ATM Filter Configuration Scenario, page 12-8
• Filtering IP Packets at the IP Interfaces, page 12-9
• Configuring Per-Interface Address Registration with Optional Access Filters, page 12-13
Access Control Overview
The ATM signalling software uses the access control list to filter setup messages on an interface based
on destination, source, or a combination of both. Access lists can be used to deny connections known to
be security risks and permit all other connections, or to permit only those connections considered
acceptable and deny all the rest. For firewall implementation, denying access to security risks offers
more control.