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January 21, 2000
This document describes the problems fixed in Catalyst 3900 switch main image Release 3.0(7) and in ATM firmware image Release 1.2(5). 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(7) of the Catalyst 3900 series main image and Release 1.2(5) 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(7).
| Problem Identifier | Problem Description |
|---|---|
CSCdk46393 | Executing a TFTP upload might fail with the message "Loading box aborted operation." This problem occurs when a TFTP failure has occurred (for example when the TFTP server is down). Once this problem occurs, all TFTP upload or download attempts fail with the same message. |
CSCdm38782 | In a network configuration in which multiple Catalyst 3900 switches connected via ISL exist, manually changing the VTP mode of the switch configured as a VTP server could cause one of the switches to reset. |
CSCdm40526 | If an explorer packet destined for an ISL-attached Catalyst 3900 is bridged between Token VLANs via a Catalyst 5000 RSM, the receiving Catalyst 3900 incorrectly caches the originator's RIF. This problem results in no IP connectivity and only occurs when VLAN bridging is configured between Token Ring VLANs via the RSM. |
CSCdm42272 | In a stack of switches in which an ISL uplink is established, assigning a Token Ring port to a new TrCRF can cause previously learned directed frames to flood the network until the stack is rebooted. This problem causes a heavier traffic load and a longer delay in receiving directed traffic. |
CSCdm45443 | In a Catalyst 3900 in which an ISL uplink is configured, the maximum hop count limits do not function properly when an explorer path includes a Catalyst 3900 switch on which a frame comes in one ISL port and exits through another ISL port in the same switch. This problem causes explorer packets to be incorrectly forwarded. |
CSCdm57921 | Some TFTP servers do not resend data packets if they do not receive an acknowledgment (ACK). If an ACK sent by a Catalyst 3900 was dropped because of congestion, TFTP operations could timeout. |
CSCdm60268 | In rare circumstances, the VTP database might contain invalid parent VLAN (TrBRF) IDs. If the parent VLAN ID of the default TrCRF is zero instead of 1005, the Catalyst 3900 accepts the VTP advertisement and then fails with an "ASSERT failed" error message. This problem typically occurs right when the Catalyst 3900 VTP mode is changed from Transparent mode to Server or Client mode. |
CSCdm61100 | In a stack configuration, assigning a port to a new TrCRF causes the console to pause indefinitely. This problem occurs with both Telnet and serial console connections. |
CSCdm71129 | When using an application such as CiscoView to configure a Catalyst 3920 switch, you cannot assign or move ports 21 through 24 to a TrCRF. Also, you cannot assign another port to a TrCRF to which ports 21 through 24 are assigned. |
CSCdm88900 | In a stack configuration, changing the port state of multiple ports on the same switch via the console might result in the port state reverting back to its original setting. This problem occurs when the port state is enabled or disabled for multiple ports within a 10-second time period. |
CSCdm93993 | Deleting a VLAN that contains a port that is on an ATM uplink module causes the Catalyst 3900 switch to reboot. This problem causes a temporary loss of service. |
CSCdp05226 | Allow destination MAC address filters work correctly for frames which are switched to other ports within the same TrCRF, however, frames which should be switched to ports in other TrCRFs in the same TrBRF are incorrectly dropped. With this problem, connectivity to stations in other TrCRFs that have allow destination MAC address filters configured is not possible. |
CSCdp05265 | In a back-to-back Catalyst stack consisting of two switches (box 1 and box 2), connectivity between stations connected to the ports on box 2 might be lost after box 1 is powered down. Sometimes, connectivity may also be lost after box 1 is powered down and then powered back on. This problem does not occur if the switches are connected to a Catalyst Matrix. |
CSCdp33032 | Even when the backup TrCRF feature working properly on the Catalyst 3900, the following message might display on the console: DRIP: VLAN 603, Addr1=00-05-77-02-ce-00, Addr2=00-05-77-02-ba-00 - Active Conflict with VLAN
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CSCdp56842 | ISL frames that are received with a destination VLAN of a TrBRF and a destination MAC address of the all F broadcast address or the Token Ring multicast address are not forwarded to ports on other switches if the ring number has not been configured. |
The following is a list of problems found in the Catalyst 3900 ATM firmware image that have been resolved in the Release 1.2(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. |
CSCdm01728 | In rare circumstances, the processing of Address Resolution Protocol (ARP) messages might cause a loss of service for the ATM module. This problem results connectivity loss across the ATM network. The local Token Ring network connectivity is not affected. |
CSCdm47776 | After extended periods of uninterrupted operation, a Catalyst 3900 switch might begin to truncate (and therefore corrupt) frames that it receives from the ATM network that are to be forwarded to the local network. |
CSCdm92419 | In large network configurations in which many TrCRFs are configured, assigning an ATM module to a TrCRF might result in the LEC associated with that TrCRF not connecting with LANE services. When this problem occurs, the Status field (located on the ATM LEC Setup panel) displays Going Up and never progresses to Up or Forwarding mode. Also, when this problem occurs, no traffic passes to the ATM network for that TrCRF. |
CSCdm92420
| Under light traffic loads, the forwarding of a packet out of an ATM module might be delayed by a Catalyst 3900 switch until another packet is sent out of the module. This problem results in sporadic traffic flow and slow throughput for transport protocols that have long timeouts. |
There are no known problems in this release of the Catalyst 3900 series main image.
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 option to configure the insert LED to blink on disabled ports has been added to the Switch Configuration panel. By configuring the insert LED to blink on ports that are disabled, you can visually identify which ports are currently disabled. When you configure the insert LEDs to blink on disabled ports, if the switch is part of a stack, the setting applies to all switches in the stack. If you enable and then disable this feature, the insert LEDs on the disabled ports will continue to blink until the switch is rebooted.
To configure the insert LED to blink on ports that are disabled, complete the following steps:
Step 1 Select Switch Configuration on the Configuration menu. The Switch Configuration panel is displayed.
Step 2 Select the Blink Disabled Port LEDs option and press Enter.
Step 3 Select Yes if you want the insert LEDs to blink on disabled ports. Select No if you do not want the insert LEDs to blink on disabled ports. The default is No.
Step 4 Select Return to save your changes and to exit the Switch Configuration panel.
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 list of MIBs documented in the "SNMP-Based Management" section of the user guide is not complete. In addition to the documented MIBs, the Catalyst 3900 also supports two additional standard MIBs and one additional private MIB.
The Catalyst 3900 supports the following additional standard MIBs:
The Catalyst 3900 also supports the following private MIB:
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:
The two sentences at the end of the third paragraph in the "Configuring VLANs and VTP" section of the user guide are misleading.
The last sentence of the paragraph, "Likewise, a device may belong to multiple management domains if the VLANs defined for the device belong to different management domains" is not correct because a stack of Catalyst 3900 switches can only be part of one VTP management domain.
The second to last sentence of the paragraph, "Different devices may belong to the same management domain if the VLANs defined for the devices belong to the same management domain" is misleading because VTP would not be useful if multiple switches in the same domain were not supported. Therefore, multiple switches in the same domain is a supported function.
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.
An information panel, the VTP Configuration Information panel, has been added that displays how many local VLANs are currently defined and how many preferred VLANs are currently available.
To access the VTP Configuration panel, select Info on the VTP VLAN Configuration panel. The VLAN Configuration Information panel (Figure 1) is displayed.
The following information is displayed on this panel:
The VLAN Parameter Configuration panel for a TrBRF has been changed to prevent you from configuring an MTU size larger than 4472 for a TrBRF that contains an ATM port. This change 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, if you specify an MTU greater than 4472 for a TrBRF that contains an ATM port, the ATM port is removed from the TrBRF and the following message is 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, you must set the Local Mode (on the VTP Administrative Configuration panel) to Transparent (which is the default) and the ring number 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(1003) is the only TrCRF for which the ring number is set to auto, the ring number is automatically be set to the learned ring number or, if the ring number has not been learned, it is set to 0xCCC.
If you attempt to assign a port to a TrCRF to which remote ports have already been assigned, the following message is generated:
Error - TrCRF has remote ports assigned
If you attempt the same procedure via an SNMP manager, the following message is generated:
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:
With Catalyst 3900 Token Ring software Release 3.0(6) and later, an additional TrCRF STP mode is available. When configuring the STP mode of a TrCRF via the Spanning Tree for a TrCRF panel, you can now select auto-fast mode in addition to auto, blocked, or forwarding mode.
When the STP mode of a TrCRF is auto (the default), a Token Ring port state change (coming up or going down) causes the TrCRF-to-TrBRF link to cycle through spanning tree states. Until the spanning tree state returns to forwarding, stations in the TrCRF lose connectivity with stations in other TrCRFs associated with the same TrBRF.
However, when the TrCRF STP mode is auto-fast, Token Ring port state changes do not impact the spanning tree state of the TrCRF-to-TrBRF link unless the port happens to be the first active port in the TrCRF.
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 transitions 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 new field, labeled Operation Mode, read-only and the only possible value is FDX trunking.
You can now define filters based on the DSAP values 0x00 and 0xAA. If you include a DSAP of 0xAA 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:
Because 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 just 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 changed to make it easier for you to configure MAC address and protocol filters. As a result a new panel, the MAC Address Filters panel, has been added. The new options available on the Filters & Port Security panel are:
You can now find the following options that were displayed on the Filter & Port Security panel 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 changed 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 changed 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:
The Invalid ISL VLAN error counter that was available on the ISL Port Error Statistics panel has been moved to the ISL Port General Statistics panel and renamed to Non-Local VLAN Frames Received.
The Non-Local VLAN Frames Received field displays the number of frames received that contained a source VLAN ID that was unknown (based on the current configuration of the switch).
Fields that identify 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 displays in the Ptcl column. Possible values are IBM, IEEE, or blank.
When viewing the Spanning-Tree parameters for a TrCRF, the protocol running on that TrCRF displays 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.
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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.
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Posted: Fri Jan 21 07:41:49 PST 2000
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