Catalyst 5000 Series Release Notes for
ATM Module Software Release 3.2

• Sometimes CRC errors result when the ATM module transmits certain sizes of frame combinations. In ATM Module Software Release 1.2, this problem is corrected. (CSCdi47110)
  

• If a data VC on an ATM card receives a CRC error in a LANE control frame, the ATM card may reset. This problem is corrected in ATM Module Software Release 1.2. (CSCdi47110)
  

ATM Module Software Release 3.2 Caveats

This section describes possible unexpected behavior and other miscellaneous caveats for Catalyst 5000 ATM Module Software Release 3.2. The caveats listed here describe only serious problems.

• When a PVC exists, there is an instance of the lecsConfigDirectConnSrc SNMP object; that is, the lecsConfigDirectConnSrc fails to be omitted. (CSCdi68849)
  

• After entering the session command to access the ATM module, enter the terminal monitor command so that additional informational messages are displayed. (CSCdi41337)
  

• You cannot use the show cam mod_num/port_num command to display all CAM entries on an ATM port because the port_num on an ATM module corresponds to a virtual circuit number instead of to a port number. An error is produced if you use this command on an ATM port. For example:
  

Console> (enable) show cam dynamic 4/301

Module 4 Port number must be in the range 1..1

  (CSCdi44444)

• On the ATM module, the copy, configure network, and write network commands do not function. Do not use these commands. (CSCdi44899)
  

• Do not hot-swap faulty ATM modules if you are using Catalyst 5000 Series Supervisor Engine Module Software Release 1.4. In these releases, modules remain off line if faulty ATM modules have been hot-swapped from their slots. To bring the modules on line, you must reset the Catalyst 5000. This problem has been fixed in Catalyst 5000 Series Supervisor Engine Module Software Release 1.5. (CSCdi45212)
  

• You cannot perform an SNMP set to a Catalyst 5000 ATM module---this capability has temporarily been disabled. (CSCdi70688)
  

ATM Module Software Release 1.1 Caveats

This section describes possible unexpected behavior and other miscellaneous caveats for ATM Module Software Release 1.1. The caveats listed here describe only serious problems.

• When you enter the write memory command from the ATM module, an ARP entry appears in the configuration file. Do not delete this ARP entry. (CSCdi37977)
  

• After entering the session command to access the ATM module, enter the terminal monitor command so that additional informational messages are displayed. (CSCdi41337)
  

• When you remove or hot-swap an ATM module while the system is operating, the port number and virtual circuit addresses in the CAM table become invalid. Use the clear cam command to delete them. (CSCdi42681)
  

• You cannot use the show cam mod_num/port_num command to display all CAM entries on an ATM port because the port_num on an ATM module corresponds to a virtual circuit number instead of a port number. An error is produced if you use this command on an ATM port. For example:
  

Console> (enable) show cam dynamic 4/301

Module 4 Port number must be in the range 1..1

  (CSCdi44444)


You cannot use the session command for an ATM card if the supervisor engine module IP 
address is not set (that is, if the supervisor engine module IP address is set to 0.0.0.0). 
To determine whether the supervisor engine module IP address is set, use the show 
interface command. (CSCdi44641)

• On the ATM module, the copy, configure network, and write network commands do not function. Do not use these commands. (CSCdi44899)
  

• When an ATM module link goes down, the Catalyst 5000 does not generate a link-down trap to indicate that the ATM link is down. (CSCdi45044)
  

• Do not hot-swap faulty ATM modules if you are using Supervisor Engine Module Software Releases 1.1, 1.2. 1.3, and 1.4. In these releases, modules remain off line if faulty ATM modules have been hot-swapped from their slots. To bring the modules on line, you must reset the Catalyst 5000. (CSCdi45212)
  

• The Catalyst 5000 does not support PVCs for LAN emulation in the ATM 1.1 Module Software Release.
  

• Sometimes CRC errors result when the ATM module transmits certain sizes of frame combinations. (CSCdi47110)
  

• If a data VC on an ATM card receives a CRC error in a LANE control frame, the ATM card may reset. (CSCdi47110)
  

• The LEC LE-ARP cache reverification timer does not update changed entries. (CSCdi50465)
  

• The Catalyst 5000 uses an incorrect Object Identifier (OID) to get the LECS address from an ATM switch. (CSCdi50537)
  

• The LEC cannot receive messages from the BUS on the point-to-point multicast send VCC. Although the ATM Forum specification allows for the BUS to send packets to the LEC on this VCC, Cisco's BUS is not implemented in this way. (CSCdi50945)
  

• The LEC software must be modified to allow it to operate with a Cisco LS2020 ATM switch. (CSCdi51791)
  

• The ATM module may stop forwarding packets if it receives a normally-sized packet that has an incorrect, very large value in the AAL5 length field. (CSCdi51872)
  

• If you remove the media cable from an active module, stale entries in the transmitter's content-addressable memory (TSAR CAM) can cause a race condition that forces traffic to a specific MAC address through the BUS instead of through a data direct virtual connection (VC).
  

• When you insert or replace ATM modules, clear the module configuration information, using the command clear config all or clear config mod_num, to obtain the correct spanning tree parameters for the modules.
  

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