Troubleshooting guide

13-4
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
ATM Router Module Software
This section describes software image requirements and restrictions that, if ignored could cause your
ATM router module to malfunction.
Catalyst8540 CSR Enhanced ATM Router Module Software Restrictions
The following software restrictions apply to the Catalyst 8540 CSR enhanced ATM router module:
• LANE is not supported.
• Use tag switching functionality with caution. Do not distribute routes learned through tag switching
to Fast Ethernet (FE) or Gigabit Ethernet (GE), or vice versa. Otherwise, you might have
unreachable route destinations.
• 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.
• 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
pairs 0 and 1, 2 and 3, 9 and 10, and 11 and 12 use the same switching modules for scheduling. For
example, do not install an ATM router module in slot 10 when hierarchical VP tunnels are
configured on slot 9. For more information on hierarchical VP tunneling restrictions, refer to the
“Configuring Virtual Connections” chapter in the ATM Switch Router Software Configuration
Guide.
The Catalyst 8540 CSR enhanced ATM router modules do not support the following features:
• Point-to-point subinterfaces. Only point-to-multipoint subinterfaces are supported.
• Tag-edged router functionality
• Fast Simple Server Redundancy Protocol (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
• Layer 2 ACLs