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February 09, 1998
This document describes the Catalyst 5000 series Token Ring module software release 3.1(2), including a list of problems fixed in this release and a list of known (open) problems for this release. This document is available on the Cisco Connection Documentation CD-ROM or in print.
Sections in this document include the following:
The Catalyst 5000 series Token Ring module software release 3.1(2) includes support for the Catalyst 5000 series Token Ring module, which is a 16-port module that provides Token Ring connectivity for the Catalyst 5000 series of switches. For more information about the Token Ring module, see the Catalyst 5000 Series Token Ring Module Configuration Note that is shipped with each Token Ring module.
The CiscoView support for the Catalyst 5000 has been updated to include options for configuring and managing the Catalyst 5000 series Token Ring module. To upgrade to the latest release of the CiscoView Catalyst 5000 device package, download the device package from the Cisco Connection Online (CCO).
The following documents are available for the Catalyst 5000 series switch:
The following documents are available for the Catalyst 5000 series switch Token Ring module:
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This section contains information that has changed from what is documented in the Catalyst 5000 Series Token Ring Module Configuration Note that was shipped with the Token Ring module.
The Catalyst 5000 Series Token Ring Module Configuration Note documents that the possible priority range for physical and logical ports is 0 through 255 (decimal) and that the default is 128.
While this information is correct for the physical Token Ring ports, it is incorrect for the logical ports (the connection between the TrBRF and TrCRF). The valid priority range for the logical Token Ring ports is 0 through 7. The default is 4.
The following is a list of problems that have been resolved in this release.
| Problem Identifier | Problem Description |
|---|---|
| CSCdj66141 | Directly attached IPX client cannot open/insert onto the ring |
| CSCdj67357 | DRiP not enabled after a clear config command has been issued |
| CSCdj67755 | Problems issuing the show drip statistics command |
| CSCdj68432 | Token Ring endstation RIF cache fills with gratuitous entries |
| CSCdj68494 | Configuring the IEEE Spanning Tree multicast address can cause broadcast storms |
| CSCdj68514 | Port remains disabled after recreating previously cleared TrCRF |
| CSCdj68520 | Disabled ports are not disabled when TrCRF is suspended |
| CSCdj68694 | Problems using autosensing for port speed and operation mode |
| CSCdj69889 and CSCdj69548 | Token Ring module reset can cause spanning-tree instability |
| CSCdj70705 and CSCdj67138 | TrCRF stations lose connectivity outside the TrCRF when a station inserts into the ring |
This section describes possible unexpected behavior and other known problems for Catalyst 5000 series Token Ring software release 3.1(2).
Problem Identifier: CSCdj38286
Problem Description: While learning new MAC addresses under higher frame rates, the switch may drop a frame as the new address is being learned. This would be seen, for example, if 20 frames with the same unknown destination address were sent to the switch at a high rate (thousands of frames per second). The switch may only forward 19 of those frames (one may get dropped). Once the address is learned by the switch, the switch will forward all frames.
Recommended Action: None.
Problem Identifier: CSCdj45517
Problem Description: After downloading an image to the Token Ring module, messages indicating that the module has been removed and inserted appear. These messages are not significant and do not affect the image download process.
Recommended Action: None.
Problem Identifier: CSCdj46233
Problem Description: When a switch port is in the Inactive state and a lobe cable is connected to the port, the show mac command will show that the InOctet counter is increasing. This could occur if VTP V2 is not enabled.
Recommended Action: Ignore the InOctet counter for ports in the Inactive state or unplug the cable for Inactive ports.
Problem Identifier: CSCdj47074
Problem Description: When a TrCRF is moved from one TrBRF to another, the BDPUs generated by the new TrBRF are not received until approximately 30 seconds after the TrCRF BDPUs are observed. This could lead to slower convergence and an additional delay may be detected in the convergence of the TrBRF spanning tree.
Recommended Action: None.
Problem Identifier: CSCdj52128
Problem Description: The Token Ring endstation cannot receive unicast all-routes explorer or spanning-tree explorer frames on the management VLAN. Any unicast all-routes explorer or spanning-tree explorer frames received will be dropped.
Recommended Action: None.
Problem Identifier: CSCdj54910
Problem Description: The data in the Rcv-Frms field returned with the output of the show mac command reflects two times the number of frames that were actually received when the traffic being counted is non source-route with the unknown destination address and the source address being learned.
Recommended Action: None.
Problem Identifier: CSCdj63325
Problem Description: The data in the ActiveStation and OrderChanges fields returned by the show station control command retain their previous values after the attached MAU or concentrator is removed from the port. If a MAU or concentrator is reattached to the port, the ActiveStation field will report the correct number of active stations on the attached token ring. The OrderChanges field will, however, include the old value incremented by one.
Recommended Action: None.
Problem Identifier: CSCdj63333
Problem Description: The data in the BeaconSender field returned with the output of the show station control command does not reflect the MAC address of the station that caused the last Beacon condition on the Token Ring.
Recommended Action: None.
Problem Identifier: CSCdj65766
Problem Description: At least one port of the Token Ring module must be enabled when downloading a image to the Token Ring module.
Recommended Action: Do not disable ports on the Token Ring module before initiating a module download.
Problem Identifier: CSCdj65924
Problem Description: Enabling and disabling the Token Ring module using the set module enable/disable command is not supported in this release.
Recommended Action: To achieve similar functionality issue the set port disable mod_num/1-16 command, where mod_num is the slot in which the Token Ring module is installed.
Problem Identifier: CSCdj65928
Problem Description: Downloading images to multiple Token Ring modules in the same chassis using the multiple module download command is not supported in this release.
Recommended Action: To download module images to the Token Ring module, use the download server filename slot_num command where slot_num is the slot in which the Token Ring module is installed.
Problem Identifier: CSCdj67515
Problem Description: When utilization on the Token Ring module is 20 percent or greater (for example, three or more ports are receiving and transmitting traffic), TFTP downloads of new images for the Token Ring module may fail.
Recommended Action: Before performing an image download to the Token Ring module, stop traffic passing through the module. The Token Ring module will reset immediately upon completion of the download.
Problem Identifier: CSCdj68805
Problem Description: Under heavy traffic loads, the Catalyst 5000 series Token Ring module may direct a packet to the wrong port or ports. This may result in the learning of an invalid CAM entry.
Recommended Action: Avoid fully loading the Token Ring module.
Problem Identifier: CSCdj75479
Problem Description: MAC and port counters are not reset on the Catalyst 5000 series Token Ring module when the clear counters command is issued.
Recommended Action: None.
Problem Identifier: CSCdj77835
Problem Description: Interoperation between bridges that send spanning tree Bridge Protocol Data Units (BDPUs) as explorer packets will result in the spanning tree not detecting that the packets are BPDUs. Because the packets are not detected as BDPUs and are processed as regular explorer traffic, the network topology will not resolve correctly. As a result, traffic storms can occur.
Recommended Action: Ensure that loops do not exist in the network topology.
When changes are made to the Catalyst 5000 software, the new image is posted to CCO. You can then obtain a copy of the image and download it to your switch.
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