Troubleshooting guide

13-6
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 13 Troubleshooting ATM Router Module Connections
Hardware and Software Restrictions of the ATM Router Module
Catalyst8510 MSR and LightStream 1010 ATM Router Module Software Restrictions
The following software restrictions apply to the Catalyst 8510 MSR ATM router module:
• Use tag switching functionality with caution. The switch router does not distribute routes learned
through tag switching to FE or GE, or vice versa. If you use tag switching, you might have
unreachable route destinations.
Note This is a temporary restriction. A soon-to-be-released software update will remove this limitation.
• The ATM router module does not initialize if it replaces an ATM port adapter or interface module
when hierarchical VP tunnels are globally enabled. Reboot the switch to initialize the ATM router
module.
• ATM Director does not support any PVC commands.
• RFC 1483 on the ATM router module supports only AAL5 SNAP encapsulation.
• Up to 2048 external VCs can be configured on each ATM router module interface.
• Do not install an ATM router module in a slot pair with hierarchical VP tunnels configured. Slot pair
0 and 1 and slot pair 3 and 4 use the same switching modules for scheduling. For example, do not
install an ATM router module in slot 1 when hierarchical VP tunnels are configured on slot 0. For
more information on hierarchical VP tunneling restrictions, refer to the “Configuring Virtual
Connections” chapter in the ATM Switch Router Software Configuration Guide.
• RFC 1577 SVCs
• LANE clients are not supported.
• Only UBR PVCs are supported.
The Catalyst 8510 MSR and LightStream 1010 ATM router modules do not support the following
features:
• Point-to-point subinterfaces. Only point-to-multipoint subinterfaces are supported.
• Tag-edged router functionality
• SSRP
• Bridging for multiplexing device encapsulation
• Protocol Independent Multicast (PIM) IP multipoint signalling
• PIM nonbroadcast multiaccess (NBMA)
• PIM over ATM multipoint signalling
• Translation from IP quality of service (QoS) to ATM QoS
• Resource Reservation Protocol (RSVP) to ATM SVC
• Access lists for ATM to ATM routing
• Half-bridge devices
• RFC 1483 MUX encapsulation
• ACL support for IP, and standard ACL support for IPX
• IP fragmentation support.
• IP 6-path load balancing support.