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January 20, 1999
This document describes the problems fixed in Catalyst 3900 switch main image Release 3.0(5) and in ATM firmware image Release 1.2(4). It also lists the known problems for these releases and contains information about the Catalyst 3900 and Catalyst 3920 Token Ring switches that was not included in the user guides. This document is available on the Cisco Connection Documentation CD-ROM or in print.
Sections in this document include the following:
This section lists problems that have been resolved in Release 3.0(5) of the Catalyst 3900 series main image and Release 1.2(4) of the ATM firmware image.
The following is a list of problems found in the Catalyst 3900 series main image that have been resolved in Release 3.0(5).
| Problem Identifier | Problem Description |
|---|---|
CSCdk48384 | When defining a traffic profile to use for mapping outgoing traffic for an ATM connection, setting the VCC Type parameter on the Traffic Profile Mapping panel to Any does not use the profile for any VCC type. Instead, the default traffic profile is used by VCCs when the VCC Type parameter is set to Any. However, setting the VCC Type to DataDirect will apply the traffic profile map to any VCC type. |
CSCdk73749 | Software congestion control for source-route traffic is not correctly handled on ISL ports. When there is moderate to heavy source-route traffic traversing ISL ports and a configuration change occurs, the ISL ports reconfigure and addresses are relearned. This results in the flooding of source-route traffic and a congested CPU, which causes instability in a stack configuration and in spanning tree. |
CSCdk74819 | Under rare circumstances, some Token Ring ports on the Catalyst 3900 might stop accepting traffic forwarded from another Token Ring port on the Catalyst 3900. This problem results in devices connected via one Token Ring port not being able to communicate with devices connected via another Token Ring port. Session loss can occur. |
CSCdk78872
| ARE reduction might not be correctly managed when an ISL module is included in the switch regardless of whether ARE reduction is enabled or disabled for the ISL module. This problem results in ARE frames not being forwarded onto some TrCRFs and the inability to successfully disable ARE reduction for the ISL module. |
The following is a list of problems found in the Catalyst 3900 ATM firmware image that have been resolved in the Release 1.2(4).
| Problem Identifier | Problem Description |
|---|---|
CSCdk13983 | Module timers run too fast. As a result, timeout periods are shorter than they are actually configured for. |
CSCdk23442 | MAC addresses and route descriptors are aged out regardless of their respective usage. As a result, a Data Direct VCC might be torn down and reestablished. |
This section lists the currently known problems in this release.
Problem: VTP Server does not change TrCRF Spanning-Tree Protocol (STP) information on the VTP Client (CSCdj79664)
Problem: Possible loops occurring with VTP (CSCdj89372)
Problem: TrBRF spanning tree might not properly converge when the root bridge of the TrBRF is located in a TrCRF on another switch in the stack (CSCdk54804)
This section contains information that was not included in the Catalyst 3900 or Catalyst 3920 User Guides. The headings in this section correspond with the applicable section titles in the documentation.
The Catalyst 3900 and 3920 Token Ring switches support source-route bridging (SRB), source-route transparent bridging (SRT), and source-route switching. You can enable either SRB or SRT for the logical connections between the TrCRF and the TrBRF. Source-route switching is used for frame forwarding within the TrCRF and is always enabled.
The description of the Token Ring Ring Station Group is incorrect. This section should read as follows:
The Catalyst 3900 series Token Ring switches support the ringStationControlTable portion of the Token Ring Ring Station Group. This support allows a Catalyst 3900 series switch to gather segment information from each ring segment to which it is attached. This segment information includes Ring State, Beacon Sender, Beacon NAUN, and Active Monitor MAC Address, as well as Station Order Changes.
If you plan to interconnect your Catalyst 3900 with a Catalyst 5000, your Catalyst 5000 should have Supervisor Card revision 2, or later, with NMP version 3.0(201), or later. Also, because VTP pruning is currently not supported by the Catalyst 3900, if you extend a TrBRF from a Catalyst 3900 to a Catalyst 5000 that is using VTP pruning, you must set the TrBRF to ineligible on the Catalyst 5000.
CiscoView shows the burned-in MAC address and the configured locally administered address in non-canonical format. The Switch Configuration panel allows you to choose whether the MAC addresses displayed on the console panels are in canonical or non-canonical format. The default is non-canonical.
The Hw Rev column on the Module Information panel has been updated to reflect the revision numbers of the module and the associated ASICs. For the base switch and the Token Ring fiber and copper expansion modules, the hardware revision is now displayed in the format x.y.z, where:
Changing the Local Mode field on the VTP Administrative Configuration panel from Client to Transparent or Server generates the following message when the number of defined VLANs is greater than the amount that can be stored in NVRAM:
Mode must be Client. There are too many VLANs to store on local device.
Performing the same procedure via an SNMP manager generates the following message:
WRONG_VALUE_ERROR.
Modifications have been made to the VLAN Parameter Configuration panel for a TrBRF that prevent you from configuring an MTU size larger than 4472 for a TrBRF that contains an ATM port. This modification has been made because the Catalyst 3900 ATM module does not support MTUs greater than 4472.
With the Catalyst 3900 main image Release 3.0(3) or later, specifying an MTU greater than 4472 for a TrBRF that contains an ATM port will result in the ATM port being removed from the TrBRF and the following message being displayed:
ATM Port removed from TrBRF since BRF MTU > 4K
port=25, crf=1003, brf=1005, vlanmtu=8144
As stated in the "Adding or Changing TrCRF VLAN Parameters" section of the User Guide, 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 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.
With Release 3.0(3) or later of the Catalyst 3900 main image, if you have previously set the Local Mode of the default TrCRF (1003) to Transparent and the ring number to auto, you can now change the Local Mode while ring number learning is in progress. If the default TrCRF is the only TrCRF for which the ring number is set to auto, the ring number will automatically be set to the learned ring number or, if the ring number has not been learned, it will be set to 0xCCC.
Attempting to assign a port to a TrCRF to which remote ports are already assigned generates the following message:
Error - TrCRF has remote ports assigned
Attempting the same procedure via an SNMP manager generates the following message:
WRONG_VALUE_ERROR
An additional option, Management VLAN, has been added to the SNMP Configuration panel. This option enables you to select the VLAN that has the IP address you want to use for the following:
When configuring a port to operate in adaptive cut-through, you can specify a threshold for errored frames. If this threshold is exceeded, the port will transition from cut-through to store-and-forward mode. Errored frames include frames with CRC errors, aborted frames, and frames that are considered too short.
The ATM LEC Setup panel has been modified to indicate that the Catalyst 3900 ATM module supports MTUs up to 4472.
In the User Guide, the possible values listed for the MTU field are 1500, 4472, 8144, and 17800. With this release of the Catalyst 3900 main image, the possible values for the MTU field on the ATM LEC Setup panel are 1500 and 4472.
The Port Configuration panel for an ISL port has been updated to reflect the operation mode of the port. This field, labeled Operation Mode, is display only and the only possible value currently is FDX trunking.
You can now define filters based on the DSAP values 0x00 and 0xAA. If a DASP of 0xAA is included in a protocol filter, all SNAP frames will be filtered regardless of any EtherType currently specified. If you attempt to define a filter based on both an EtherType and the DSAP value 0xAA the following message is generated:
Warning - Ethertype filtering will be ignored while filtering with DSAP 0xAA.
For a list of additional SAP values on which you can base filters, refer to the "Service Access Points" section of the "Codes and IDs" appendix of the User Guide.
Additional changes to the Protocol Class Assignment panel include the following:
As the required hardware has not become available in the marketplace to support passive monitoring of network traffic, the Catalyst 3900 no longer allows the configuration of passive SPAN.
As mentioned in the User Guide, you must place your SPAN port in a separate TrCRF and TrBRF that contains no other ports. If you plan to use SPAN, we recommend that you create a TrCRF and TrBRF upon initial configuration specifically for this purpose. It is also a good idea to leave a port on the switch assigned to this TrCRF for the purposes of future SPAN use.
The Filters & Port Security panel has been modified to make it easier to configure MAC address and protocol filters. As a result a new panel, the MAC Address Filters panel, has been added and the new options available on the Filters & Port Security panel are:
The following options that were displayed on the Filter & Port Security panel are now available on the MAC Address Filters panel:
For more information about these options, refer to the "Limiting Scope and Access" section of the User Guide.
Two fields on the General Statistics panel for a port have been modified to clarify the information the counters are reflecting. The Frames Filtered - Addr and Frames Filtered DSAP fields in the left-hand column have been changed to the following:
Two fields on the Frame Forwarding Statistics panel for an ATM port have been modified to clarify the information the counters are reflecting. The Frames Filtered - Addr and Frames Filtered - DSAP fields in the left-hand column have been changed to the following:
Fields identifying the Spanning-Tree Protocol running at the TrBRF and TrCRF levels have been added to the Current Spanning Tree Information panel.
When viewing the Spanning-Tree parameters for a TrBRF, the protocol running per TrCRF is identified in the Ptcl column. Possible values are IBM, IEEE, or blank.
When viewing the Spanning-Tree parameters for a TrCRF, the protocol running is identified in the Protocol field. Possible values for the Protocol field are Cisco and IEEE.
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.
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