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December 15, 1997
This document describes what is new in this release, including a list of the new features and the fixed problems. It also lists the known (open) problems for this release. In addition, it contains information about the Catalyst 3900 Token Ring Switch that was not included in the Catalyst 3900 Token Ring Switch User Guide. This document is available on the Cisco Connection Documentation CD-ROM or in print.
Sections in this document include the following:
This release includes support for the Catalyst 3900 multimode fiber ATM expansion module, which is a single-port expansion module that provides high-speed connectivity between the Catalyst 3900 Token Ring switch and an ATM backbone network. For more information about the ATM expansion module, see the Catalyst 3900 Multimode Fiber ATM Expansion Module Configuration Note that is shipped with each ATM module.
Release 2.0(1) of the Cisco Catalyst 3900 software is supported by Version 2.0(1) of the Cisco Catalyst 3900 private MIB and Version 2.0(1) of the Cisco Catalyst 3900 ATM Uplink MIB. The CiscoView support for the Catalyst 3900 has been updated to support these MIBs and to include options for configuring and managing the Catalyst 3900 ATM module. To upgrade to the latest release of the CiscoView Catalyst 3900 device package, download the device package from the Cisco Connection Online (CCO).
The following is a list of problems that have been resolved in this release.
| Problem Identifier | Problem Description |
|---|---|
| CSCdj22253 | Spanning tree mode does not default to forwarding |
| CSCdj22268 | Unable to exit Menu Busy message |
| CSCdj22543 | Problems using the Esc key on the VLAN and VTP Configuration panel |
| CSCdj28191 | Multiple prompts for box number when configuring filters |
| CSCdj28200 | Problems using Olicom adapters at 4 Mbps |
| CSCdj38324 | Hardware multicast problem impacting the stack |
| CSCdj39390 and CSCdj36498 | Cannot reset password from System Request menu |
| CSCdj39692 and CSCdj47800 | Speed error detected incorrectly |
| CSCdj39729 | Status of inserted ports not accurately reflected in the software |
| CSCdj41972 | TrBRF spanning tree does not use configured MAC address |
| CSCdj42346 | Difficulty exiting the Port Spanning Tree Parameters panel |
| CSCdj42362 | Tab key not working properly on certain panels |
| CSCdj43061 | IP communications lost when spanning tree is modified via SNMP |
| CSCdj43063 | Aging level set via SNMP not reflected correctly at console |
| CSCdj43079 | Console allows configuration of MAC filters for non-existent ports |
| CSCdj47785 and CSCdj36485 | Spanning tree loses a TrCRF in one of the TrBRFs |
| CSCdj50969 | Catalyst 3900 stops forwarding traffic across TrCRFs |
| CSCdj50968 | Changes to the trap receiver table not implemented properly |
| CSCdj52898 | Frequency errors included with transmit abort errors |
| CSCdj52910 | Unable to enable ports on expansion module |
| CSCdj53416 | VLAN ports of entry not set correctly |
| CSCdj54655 | Problem with TokenChannels with ten or more TrCRFs |
| CSCdj58083 | TrBRF domains not being updated correctly |
| CSCdj58286 | VTP Reports an Internal Error when Deleting a TrBRF or TrCRF |
| CSCdj58704 | VTP detecting duplicate ring number when no duplicate ring number exists |
| CSCdj58714 | Problems clearing address table under heavy unicast traffic |
| CSCdj59100 | Problems with console panels when pressing ESC on the Select TrBRF panel |
| CSCdj59407 | Ring number not set correctly when re-assigning a port to TrCRF in same TrBRF |
| CSCdj64643 | TrBRF Spanning-Tree Protocol disabled inadvertently when TrCRF parameters are updated |
This section lists the currently known problems.
Problem Identifier: CSCdj23476
Problem Description: If a device attached to a port begins to flood a given port with large frames (over 4K) addressed to the spanning tree functional address, the message STP: Cpubuf_to_Netbuf No More Memory is displayed and a fatal error could occur.
Recommended Action: Identify the faulty device that is flooding the given port and remove it from the network.
Problem Identifier: CSCdj31691
Problem Description: The TrCRF hop counts for ARE and STE explorers displayed on the console can appear as 14, which is outside the valid range. This problem occurs if an SNMP manager is used to set the value to 14. This may cause explorers with 30 byte routing information fields to be dropped and not forwarded across a TrBRF.
Recommended Action: Users should only set hop counts to the values 1 through 13.
Problem Identifier: CSCdj33434
Problem Description: There are known problems associated with inserting Catalyst 3900 ports into the Transition Engineering, Inc. LAN Master TR 16 Retiming Hub.
Recommended Action: If you experience problems opening into this particular concentrator, do the following:
Step 1 Check the Operation Mode of the Catalyst 3900 port on the Port Configuration panel. If it is A-unknown, then configure it to be HDX station.
Step 2 Check the Media Speed of the Catalyst 3900 port on the Port Configuration panel. If it is A-unknown, then configure it to be the speed at which the Transition Engineering concentrator is currently running.
Step 3 Insert the Catalyst 3900 port into another MAU. Once the port opens, quickly move it out of that MAU and into the Transition Engineering hub.
Problem Identifier: CSCdj34650
Problem Description: A TFTP code download fails when the user tries to clear a message from a telnet or console screen. This problem occurs if a TFTP code download is in progress and an event occurs that causes a message to be displayed on the screen. The user presses the Esc key to clear the message and the download is aborted.
Recommended Action: Do not press Esc to clear the message until after the code has been downloaded and written to flash. The user will see the prompt to press the Return key below the message box. This problem will be corrected in a future code release.
Problem Identifier: CSCdj37544
Problem Description: The console cannot always be used to terminate telnet sessions to the switch.
Recommended Action: None
Problem Identifier: CSCdj37783
Problem Description: The following three MIB objects will return values with the incorrect magnitude. The values should be in 1/100's of a second, instead the values are actually in seconds.
Recommended Action: Multiply the returned number by 100 to get the value in 1/100's of a second.
Problem Identifier: CSCdj42684
Problem Description: If you have a community string "private" defined on the switch and send an SNMP set with "pri" it will not result in an authentication trap. Instead a "No Such Name" error will be returned. If you send a completely different string, such as "xxx" in a SNMP set, then it will time-out and send a trap.
Recommended Action: None.
Problem Identifier: CSCdj43071
Problem Description: Creating an entry in the unsupported RMON group alarm halts the SNMP agent in the box.
Recommended Action: Do not attempt to add entries to the RMON group alarms.
Problem Identifier: CSCdj43075
Problem Description: The values for the access protocol, individual address count, and phantom drive support are not correct when read from an SNMP agent.
Recommended Action: Read the information from the switch console.
Problem Identifier: CSCdj44177
Problem Description: After a period of time, the Current Spanning Tree Information panel may show incorrect information for the Root Port and for the Max Message Age. The display is wrong on both serial and Telnet consoles.
Recommended Action: None.
Problem Identifier: CSCdj49835
Problem Description: In some situations, selecting End on the Message Log Information panel does not scroll the message log display entirely to the end of the messages.
Recommended Action: If selecting End does not scroll to the bottom of the message log, select More.
Problem Identifier: CSCdj50465
Problem Description: The switch will not learn a new ring number after the ring number has been set back to "auto". For example, assume that the ring number for a TrCRF has been configured for "auto". When the switch learns the ring number (for example, 0x123) for this TrCRF, it will correctly reflect this in the Ring Number field by displaying "A-0x123". If you attempt to reset the learned ring number by entering a null value for the Ring Number field, the switch will display "auto" for the ring number, but it will not learn a different ring number until the switch is rebooted.
Recommended Action: One option is to reboot the switch. Alternatively, you can do the following:
Step 1 On the VTP VLAN Configuration panel, select Change and specify the VLAN ID of the TrCRF.
Step 2 On the VTP VLAN Parameter Configuration for TrCRF panel, select the Ring Number field and temporarily configure the ring number using the value that should have been learned.
Step 3 Select Return to exit the VTP VLAN Parameter Configuration for TrCRF panel.
Step 4 On the VTP VLAN Configuration panel, select Change again and specify the VLAN ID of the TrCRF.
Step 5 On the VTP VLAN Parameter Configuration for TrCRF panel, select the Ring Number field and enter a null value to set the ring number back to auto, which will enable the switch to relearn a new ring number.
Problem Identifier: CSCdj53766
Problem Description: The current version of the switching ASIC in the Catalyst 3900 does not reduce STE frames. The ASIC could forward a frame back onto a ring that it has already traversed.
Recommended Action: To prevent this situation, do one of the following:
Problem Identifier: CSCdj64064
Problem Description: When joining standalone Catalyst 3900s in a back-to-back stack, the following warning message is displayed:
Units trying to form a stack have different configuration. Please select a unit as the stack's configuration provider by briefly pushing the Sysreq button on that unit. Units with matching configurations are: (1) (2).
This warning is misleading as the instructions do not work in a back-to-back stack configuration when the two Catalyst 3900s are already running.
Recommended Action: Do one of the following:
This section contains information that was not included in the Catalyst 3900 Token Ring Switch User Guide. The headings in this section correspond with the applicable section titles in the documentation.
The Switch Information and Stack Information options have been renamed to Switch Configuration and Stack Configuration.
The MAC address (burned in or locally administered) displayed on the Switch Configuration panel is used as the basis for the MAC addresses of the ports and VLANs of the switch. For more information about how MAC addresses are assigned, refer to the "Codes and IDs" appendix.
The Module Information panel has been enhanced. The Revision field as documented in the Catalyst 3900 Token Ring Switch User Guide has been replaced with two fields:
The module numbers displayed on the Module Information panel have the following meaning:
The possible statuses of a module are up, down, and empty. Up indicates that the module is properly installed. It does not imply that any ports on the module are connected and operational.
The VLAN with the VLAN name of "default" is an Ethernet VLAN and is the VLAN that will be used to transmit information for Cisco proprietary protocols, such as VTP and CDP.
A management domain is a logical grouping of VLANs used by the VLAN Trunking Protocol (VTP) for the purpose of administration and management. VTP parameters are propagated throughout the VLANs within a single management domain. While you can have duplicate VLAN names in a network, each VLAN name within a management domain must be unique. A management domain is not device specific. Different devices may belong to the same management domain if the VLANs defined for the devices belong to the same management domain. Likewise, a device may belong to multiple management domains if the VLANs defined for the device belong to different management domains.
The possible values for the State of a VLAN are Operational and Suspended. By default, all VLANs are Operational. You can change the states for TrBRFs and TrCRFs only. Consider the following when changing the states of a TrBRF or TrCRF:
For TrCRFs, you can configure the ring number or allow the Catalyst 3900 to learn the ring number. To enable ring number learning, the Local Mode (on the VTP Administrative Configuration panel) must be set to Transparent (which is the default) and the Ring Number (on the VTP VLAN Parameter Configuration for the TrCRF) must be set to auto (which is the default). If you have set the Local Mode to Client or Server, you cannot set the Ring Number to auto. Also, if you have previously set the Local Mode to Transparent and the Ring Number to auto, you cannot change the Local Mode while ring number learning is in progress.
The VTP VLAN Configuration panel (Figure 1) has been redesigned. The panel now lists the VLANs with respect to their parent-child relationships. Each TrBRF is followed by an indented list of the TrCRFs for which it is a parent. You can also sort the entries on the panel by VLAN ID. This is particularly useful when you are searching for a particular VLAN or when you want to add a VLAN and need to see the IDs that have already been assigned.
The panel also displays additional information about the VLANs.
The following information is displayed on this panel:
| To | Select | Then |
|---|---|---|
| View the current configuration of a VLAN, including a list of associated ports for a TrCRF... | View | Specify the VLAN ID. |
| Add a new TrBRF VLAN configuration... | Add | Specify the VLAN ID. Select TrBRF. Refer to the "Adding or Changing TrBRF VLAN Parameters" section of the Catalyst 3900 Token Ring Switch User Guide. |
| Add a new TrCRF VLAN configuration... | Add | Specify the VLAN ID. Select TrCRF. Refer to the "Adding or Changing TrCRF VLAN Parameters" section of the Catalyst 3900 Token Ring Switch User Guide. |
| Change an existing TrBRF VLAN configuration... | Change | Specify the VLAN ID and refer to the "Adding or Changing TrBRF VLAN Parameters" section of the Catalyst 3900 Token Ring Switch User Guide. |
| Change an existing TrCRF VLAN configuration... | Change | Specify the VLAN ID and refer to the "Adding or Changing TrCRF VLAN Parameters" section of the Catalyst 3900 Token Ring Switch User Guide. |
| Delete a VLAN... | Delete | Specify the VLAN ID. |
| Display a list of VLANs sorted by VLAN ID... | Sort | Select Sort_by_VLAN_ID. |
| Save your changes... | Return |
The IP information that you can configure is associated with a TrBRF. Therefore, if the ports of the Catalyst 3900 are assigned to more than one TrBRF, when you select IP configuration you will be presented with a list of possible TrBRFs from which to choose.
The SNMP Trap Receivers information that you can configure is associated with a TrBRF. Therefore, if the ports of the Catalyst 3900 are assigned to more than one TrBRF and you select Trap Receivers on the SNMP Configuration panel, you will be presented with a list of possible TrBRFs from which to choose.
When you configure spanning-tree parameters for a TrBRF, you:
Likewise, when you configure the spanning-tree parameters for a TrCRF, you:
You can create your own spanning tree by setting the STP Participation to No and manually controlling the forwarding state of each logical and physical port using the STP Mode fields. However, if you then decide to use one of the standard Spanning-Tree Protocols and change the STP Participation to a value other than no, you must set the STP Mode for each port to auto. The Catalyst 3900 will not automatically change the forwarding mode of related ports when you change the STP Participation from No to one of the Spanning-Tree Protocols.
To further distinguish between the spanning-tree parameters configured at the TrBRF level from those configured at the TrCRF level, the following field labels have been changed on the Spanning Tree for TrBRF panel.
| Old Field Label | New Field Label |
|---|---|
| Switch Priority | Bridge Priority |
| Switch Hello Time | Bridge Hello Time |
| Switch Maximum Message Age | Bridge Maximum Message Age |
| Switch Forward Delay | Bridge Forward Delay |
Two fields on the Spanning Tree for TrCRF panel warrant further explanation.
If a port has been disabled by the Catalyst 3900 software, the Enabled field on the Port Configuration panel will display No (auto-disabled). To manually enable the port, move to the Enabled field and select Yes.
On the CDP Configuration panel, the field labeled Trans Frequency Time has been renamed to Message Interval.
A Switched Port Analyzer (SPAN) port performs the function of port mirroring. Traffic on the monitored port is copied to the monitoring port.
Before you use a SPAN port to monitor traffic, make sure that the SPAN port is isolated by assigning it to its own TrCRF and TrBRF. See "Configuring VLANs and VTP" for more information about how to define a TrBRF and a TrCRF, and how to assign a port to a TrCRF.
You cannot specify a port that is a member of a TokenChannel as a monitoring port. Likewise, you cannot add a port that has been specified as a monitoring port to a TokenChannel.
The Running TokenChannel Information option has been renamed to Current Token Channel Information.
The Catalyst 3900 Token Ring Switch User Guide incorrectly states that you can change the names assigned to protocol classes. You cannot change the names.
When configuring MAC address filters for a port, you cannot configure multiple filters for a port that include the same MAC address. For example, you cannot specify the same MAC address in both a 'Block Destination Address' filter and a 'Block Source Address' filter for the same port. Also, you cannot specify the same MAC address in both an 'Allow Destination Address' filter and an 'Allow Source Address' filter for the same port.
The Message Log Information panel has been enhanced. The log can now maintain a list of up to 200 messages. Once 200 messages have been logged, new messages received will be added to the end of the log and the oldest message will be deleted from the panel. The log entry numbers continue to increment, indicating the total number of messages received.
To view the message log, select Message Log Information from the Statistics panel. The first (oldest) seven messages are displayed. You can use the options at the bottom of the panel to move through the message log.
To delete all messages from the message log, select Clear. You will be prompted to confirm your request to clear the log.
When changes are made to the Catalyst 3900 software, the new image is posted to CCO. You can then obtain a copy of the image and download it to your switch.
For service and support for a product purchased from a reseller, contact the reseller. Resellers offer a wide variety of Cisco service and support programs, which are described in the section "Service and Support" in the information packet that shipped with your product.
For service and support for a product purchased directly from Cisco, use CCO.
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Documentation for Cisco products is available in three forms: in a CD-ROM package, printed books, and on the World Wide Web. You have the option of subscribing to the CD ROM package through an update service. Or you can order printed documentation at an additional cost. Refer to the information packet included with the router for detailed ordering information. You can also access Cisco documentation on the World Wide Web URL http://www.cisco.com.
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