Table Of Contents
Catalyst 5000 Series Token Ring Software Release 3.2(5) Release Note
Token Ring Orderable Software Image Matrix
Amendments to the Documentation
Adding or Changing TrBRF Parameters
Adding or Changing TrBRF Parameters
Adding or Changing TrCRF Parameters
Verifying the SPAN Configuration
Displaying Token Ring Statistics, Status, and Station Information
New Features in Token Ring Software Release 3.2(5)
Handlings Frames Transmitted with Invalid Source MAC Addresses
Configuring Token Ring Port Table Address Aging
Configuring Local Address Learning
Setting Address Recognized/Frame Copied Bits
Token Ring Problems Fixed in Supervisor Engine Module Software Release 4.1(5)
Known Problems in Token Ring Software Release 3.2(5)
Availability of Catalyst 5000 Software Upgrades on CCO
Catalyst 5000 Series Token Ring Software Release 3.2(5) Release Note
March 29, 1999
This document describes the Catalyst 5000 series Token Ring software release 3.2(5), 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:
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Token Ring Orderable Software Image Matrix
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Catalyst 5000 Documentation
The following documents are available for the Catalyst 5000 series switch:
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For quick software configuration procedures for the Catalyst 5000 series switches, refer to the Catalyst 5000 Series Quick Software Configuration publication. For detailed software configuration information and procedures, refer to the Catalyst 5000 Series Software Configuration Guide.
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Token Ring Orderable Software Image Matrix
lists the software versions and applicable ordering information for the Catalyst 5000 series Token Ring module software.
Amendments to the Documentation
This section contains information that was not included in the configuration note that was shipped with the Token Ring module.
RMON Support
The descriptions of the Token Ring ring station control table and Token Ring ring station order table are incorrect. The descriptions should read as follows:
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The Catalyst 5000 series Token Ring module supports the ringStationControlTable portion of the Token Ring Ring Station Group. This support allows a Catalyst 5000 series Token Ring module to gather segment information from each ring segment to which it is attached. This segment information includes includes Ring State, Beacon Sender, Beacon NAUN, and Active Monitor MAC Address, as well as Station Order Changes.
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An ordered list of the stations on the monitored rings.
Configuring the Port Priority
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 Token Ring Bridge Relay Function [TrBRF] and Token Ring Concentrator Relay Function [TrCRF]). The valid priority range for the logical Token Ring ports is 0 through 7. The default is 4.
Adding or Changing TrBRF Parameters
The Catalyst 5000 series Token Ring software release 3.2(1) and later supports MTUs of up to 17800 bytes. The initial release of the Catalyst 5000 series Token Ring software did not support MTUs greater than 4472. Release 3.2(1) and later supports MTUs of up to 17800.
When configuring larger MTUs for the ports or TrBRFs on a Token Ring module, remember the following:
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If you reduce the MTU for a TrBRF to a value that is less than the MTU currently configured for the individual ports or LECs in the TrBRF, the MTU for the ports or LECs is automatically reduced to a value (1500, 4472, 8144, or 17800) that is less than that specified for the TrBRF.
Adding or Changing TrBRF Parameters
The Catalyst 5000 series supervisor engine module software Release 4.2 supports an additional set vlan command parameter, decring. The decring keyword enables you to specify a decimal logical ring number for TrCRFs. Previous releases of the supervisor engine module software allowed only hexadecimal ring numbers to be specified.
The syntax description for the decring keyword is as follows:
Adding or Changing TrCRF Parameters
The "Adding and Changing TrCRF Parameters" section of the Catalyst 5000 Series Token Ring Module Configuration Note defines two types of TrCRFs that you can configure. These types of TrCRFs are the undistributed TrCRF and the backup TrCRF.
However, the Catalyst 5000 series Token Ring software now allows you to configure a distributed TrCRF. A distributed TrCRF is TrCRF in which ports associated with the TrCRF are located on different Catalyst 5000 series switches.
Caution
To enable or disable the capability to distribute a TrCRF, issue the following command while in privileged mode:
set tokenring distrib-crf {enable | disable}
After enabling the distribution of TrCRFs using the set tokenring distrib-crf command, you see a display similar to the following:
Console> (enable) set tokenring distrib-crf enableWARNING:Ports will NOT be inactivated for distributed crfs. NETWORK LOOPS MAY OCCUR.Console> (enable)Monitoring Network Traffic
To aid in network management, the Catalyst 5000 series Token Ring module allows you to configure a Switched Port Analyzer (SPAN) port for monitoring port traffic. This SPAN support allows you to perform active monitoring on any single Token Ring source port. Active port monitoring allows you to copy the traffic being switched by a source port to a destination port located on the same Token Ring module. Only the logical link control (LLC) traffic that is being switched by the source port is monitored when you configure active port monitoring. The MAC frames are not monitored.
Caution
When configuring SPAN for a single Token Ring source port keep in mind the following:
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Configuring SPAN
To configure a SPAN port, issue the following command in privileged mode, specifying the source port, the destination port, and the direction of traffic that you want to monitor that is being switched on the source port.
set span {src_mod/src_port | src_vlan} dest_mod/dest_port [rx | tx | both]
Caution
Caution
After entering the set span command and specifying a source port and destination port, you see a display similar to the following:
Console> (enable) set span 3/2 3/6 txEnabled monitoring of Port 3/2 transmit traffic by Port 3/6Console> (enable)Enabling and Disabling SPAN
After configuring a SPAN port, ensure that SPAN has been enabled on the switch. If SPAN is not enabled on the switch, you can enable it using the set span command.
To enable SPAN, issue the following command while in privileged mode:
set span enable
To disable SPAN, issue the following command while in privileged mode:
set span disable
Verifying the SPAN Configuration
To verify the SPAN configuration, issue the following command:
show span
After entering the show span command, you see a display similar to the following:
Console> (enable) show spanStatus : enabledAdmin Source: Port 3/2Oper Source : Port 3/2Destination : Port 3/6Direction : transmitConsole> (enable)describes the information returned by the show span command.
Table 2 Show span Command Field Descriptions
Displaying Token Ring Statistics, Status, and Station Information
You can use the following commands to view statistics and status information associated with Token Ring stations that are located on monitored rings.
show station controltable
Use the show station controltable normal command to display a collection of statistics and status information associated with each Token Ring station on the local ring. In addition, this command provides status information for each ring being monitored.
show station controltable [mod_num[/port_num]]
Syntax Description
Default
This command has no default setting.
Command Type
Switch command
Command Mode
Normal
Example
The following example shows how to display a collection of statistics and status information associated with each Token Ring station on Token Ring module 3:
Console> (enable) show station controltable 3Port TableSize ActiveStation RingState----- ----------------- ----------------- -----------------3/1 0 0 Normal Operation3/2 0 0 Normal Operation3/3 0 0 Normal Operation3/4 0 0 Normal Operation3/5 0 0 Normal Operation3/6 0 0 Normal Operation3/7 0 0 Normal Operation3/8 0 0 Normal Operation3/9 0 0 Normal Operation3/10 0 0 Normal Operation3/11 0 0 Normal Operation3/12 0 0 Normal Operation3/13 0 0 Normal Operation3/14 0 0 Normal Operation3/15 0 2 Normal Operation3/16 0 0 Normal OperationPort BeaconSender BeaconNAUN OrderChanges----- ----------------- ----------------- -----------------3/1 00:00:00:00:00:00 00:00:00:00:00:00 03/2 00:00:00:00:00:00 00:00:00:00:00:00 03/3 00:00:00:00:00:00 00:00:00:00:00:00 03/4 00:00:00:00:00:00 00:00:00:00:00:00 03/5 00:00:00:00:00:00 00:00:00:00:00:00 03/6 00:00:00:00:00:00 00:00:00:00:00:00 03/7 00:00:00:00:00:00 00:00:00:00:00:00 03/8 00:00:00:00:00:00 00:00:00:00:00:00 03/9 00:00:00:00:00:00 00:00:00:00:00:00 03/10 00:00:00:00:00:00 00:00:00:00:00:00 03/11 00:00:00:00:00:00 00:00:00:00:00:00 03/12 00:00:00:00:00:00 00:00:00:00:00:00 03/13 00:00:00:00:00:00 00:00:00:00:00:00 03/14 00:00:00:00:00:00 00:00:00:00:00:00 03/15 00:00:00:00:00:00 00:00:00:00:00:00 13/16 00:00:00:00:00:00 00:00:00:00:00:00 0Console> (enable)describes the fields shown in the show station controltable command output.
Table 3 Show station controltable Command Field Descriptions
Related Commands
show counters
show station ordertableshow station ordertable
Use the show station ordertable normal command to display a listing of the order of stations on the monitored rings.
show station ordertable [mod_num[/port_num]]
Syntax Description
Default
This command has no default setting.
Command Type
Switch command
Command Mode
Normal
Example
The following example shows how to display:
Console> show station ordertable 3Port OrderIndex Address----- --------------- -----------------3/15 1 00:05:77:05:40:632 00:00:30:cf:a0:98Console>describes the fields shown in the show station ordertable command output.
Table 4 Show station ordertable Command Field Descriptions
Port
Module and port number.
OrderIndex
Location of the station with respect to other stations on the ring.
Address
Physical address of the station.
Related Commands
show counters
show station ordertableConfiguring Filters
With the Catalyst 5000 supervisor engine module software releases 3.2(4) and later or 4.3(2) and later image, used with the Catalyst 5000 Token Ring software release 3.2(3) and later, new parameters are supported by the set port filter command. These parameters provide the ability to configure a MAC address filter as both a source or a destination for a specified port.
The new syntax descriptions for configuring MAC address filters using the set port filter command are as follows:
set port filter <mod_num/port_num> <mac_addr> <permit|deny>
set port filter <mod_num/port_num> <mac_addr> <permit_src|permit_dst>
set port filter <mod_num/port_num> <mac_addr> <deny_src|deny_dst>
set port filter <mod_num/port_num> <mac_addr> <deny_src_learn>
Syntax Description
For more information on the set port filter command, refer to the configuration note that shipped with your Token Ring module.
Configuring VLANs
In the Catalyst 5000 Series Token Ring Module Configuration Note and the Catalyst 5000 Series Fiber Token Ring Module Configuration Note, the description of the translation parameter of the set vlan command is incorrectly documented as being "the keyword that specifies a translational VLAN used to translated FDDI or Token Ring to Ethernet."
The correct description of the translation parameter of the set vlan command should read as follows:
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(Optional) Keyword that specifies a translational VLAN used to translate FDDI to Ethernet. Possible values are 1 to 1005.
Fixing a Corrupted Flash
In the event of a corrupted Flash, a Catalyst 5000 series switch can operate in boot mode. However, when the switch is operating in boot mode, a version 3.1 boot ROM is required for the supervisor module to recognize the Token Ring module.
If the Flash becomes corrupted and the supervisor engine module is running a version 3.1 boot ROM, you can download a new image through a Token Ring module while the switch is in boot mode.
If the Flash becomes corrupted and the supervisor engine module is not running a version 3.1 boot ROM, you can download a new Flash image to the switch while in boot mode via either of the following methods:
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If you do need to upgrade your boot ROM, please contact the Cisco TAC.
New Features in Token Ring Software Release 3.2(5)
The following new features were added to the Catalyst 5000 series Token Ring software release 3.2(5) or later when used in conjunction with the Catalyst 5000 series supervisor engine module software release 4.5(1) or later.
Handlings Frames Transmitted with Invalid Source MAC Addresses
In some rare circumstances, certain devices (such as a faulty protocol analyzer) might transmit a frame that contains the source MAC address of another device. Because MAC addresses are used by the switch to determine where to forward a frame, an invalid frame (one that contains the source MAC address of another device) can cause the valid frames to be forwarded to the wrong port. If this situation occurs, communication to the device to which the MAC address actually belongs can be disrupted for as long as the invalid address entry is in the Token Ring port address table.
If you are experiencing network communication problems due to a device erroneously sending frames with the source MAC address of another device, you can either choose to rapidly age the entries out of the Token Ring module port address tables using the set tokenring portaging command or you can ensure that the Token Ring module port address tables do not contain erroneous entries by disabling address learning entirely on the Token Ring module using the set tokenring local learning command.
Caution
Configuring Token Ring Port Table Address Aging
When in a network environment in which a device is sending invalid frames, you can ensure that the Token Ring module port address tables contain correct MAC address entries by rapidly aging out the erroneous entries using the set tokenring portaging command. Rapidly aging out the Token Ring module port address table ensures that the Token Ring module port address tables do not contain invalid entries which might affect the Catalyst 5000 series switch and network communication.
The aging limit you define determines when inactive MAC addresses are removed from a port address table. The aging limit is the time (in seconds) a MAC address remains in the port's address table. Possible values are 0 and 5 through 65535 seconds. The default is 0. Zero indicates the Token Ring module port address table entries are aged out using the CAM aging time for the corresponding VLAN that has been configured using the set cam agingtime command. For more information about the set cam agingtime command, see the Catalyst 5000 Series Command Reference.
Note
To define the address aging limits for a Token Ring port, issue the following command while in privileged mode:
set tokenring portaging mod_num/port_num agingtime
After entering the set tokenring portaging command, you see a display similar to the following:
Console> (enable) set tokenring portaging 3/2 10Agingtime set to 10 sec for port 3/2Console> (enable)Configuring Local Address Learning
The set tokenring locallearning command enables you to enable or disable local MAC address learning on a Token Ring port. The default is for local address learning to be enabled.
When local address learning is enabled, the value of the address recognized (A) bit and the frame copied (C) bit in Logical Link Control (LLC) frames is set by the ports on the Token Ring module based on whether the frame was actually forwarded. However, when local address learning is disabled, the AC bits cannot be set by the ports on the Token Ring module based on whether the frame was forwarded because all frames are forwarded to the Catalyst 5000 series switching backplane.
Therefore, when local address learning is disabled on a Token Ring port, the AC bits must be set based on the type of frame that has been received. When you disable local address learning on a Token Ring port, the default is for the AC bits to always being set on LLC frames, however you can configure how the AC bits are to be set using the set tokenring acbits command. For more information on configuring for the setting of AC bits on frames, see the "Setting Address Recognized/Frame Copied Bits" section.
Note
To enable or disable local address learning, issue the following command while in privilege mode:
set tokenring locallearning mod_num/port_num enable | disable
After disabling local address learning using the set tokenring locallearning command, you see a display similar to the following:
Console> (enable) set tokenring locallearning 3/2 disableWarning: Resetting acbit value to ALWAYS: 3/2Local learning disabled for port 3/2Console> (enable)Setting Address Recognized/Frame Copied Bits
Using the set tokenring actbits command, you can specify if and how the AC bits should be set on LLC frames. When local address learning is enabled on a Token Ring port, the default is disable. When local address learning is disabled on a Token Ring port, the default is always.
To configure how the AC bits will be set for a port, issue the following command in privileged mode:
set tokenring acbits mod_num/port_num {enable | disable | sronly | never | always}
After entering the set tokenring acbits command, you see displays similar to the following:
Console> (enable) set tokenring acbits 3/2 alwaysWarning: Disable Local learning: 3/2Port 3/2 acbits alwaysThe syntax description for the set tokenring acbits command is as follows:
Token Ring Problems Fixed in Supervisor Engine Module Software Release 4.1(5)
The following is a list of Token Ring problems that have been resolved in the Catalyst 5000 series supervisor engine module software release 4.1(5).
Known Problems in Token Ring Software Release 3.2(5)
This section lists the known problems for Catalyst 5000 series Token Ring software release 3.2(5).
Problem: Fiber module port might hang when trying to insert into RIRO port of a hub (CSCdk30265)
Problem Description: If the port transmission mode of a port on the fiber Token Ring module is set to auto, connecting via a Ring In/Ring Out (RIRO) port on a hub may cause the port to hang.
Recommended Action: Use the set tokenring portmode command to configure the port for RIRO before connecting to the hub. If the failure to insert has already caused the fiber Token Ring module to hang, disabling and enabling the port using the set port disable and set port enable commands will bring the port back online.
Problem: During heavy traffic, hot inserting a Token Ring module can cause the supervisor module to reset (CSCdk63964)
Problem Description: During heavy traffic (a traffic load greater than 50 percent), hot inserting a Token Ring module into a Catalyst 5000 series switch can cause the supervisor engine module to reset.
Recommended Action: Ensure that the switch is at a low utilization level when a Token Ring module is hot inserted into the switch, or schedule a network downtime and power off the Catalyst 5000 series switch to install the Token Ring module.
Problem: The Token Ring module SPAN port feature allows only transmitted traffic to be captured by an attached network sniffer when the port to be monitored is on a different Token Ring module than the monitoring port (CSCdk78241)
Problem Description: The SPAN port feature on the Catalyst 5000 series Token Ring module is currently allowing only transmitted traffic to be captured by an externally attached network sniffer when the port to be monitored is on a different Token Ring module than the monitoring port. Received traffic cannot be captured.
Recommended Action: To view the traffic transmitted to and received from a device on the SPAN port, use a multi-access unit between the Token Ring module and the end device.
Problem: Connectivity problems occurring in redundant ISL networks if Token Ring or ATM links are forwarding instead of an ISL link (CSCdk87396)
Problem Description: In a network in which redundant ISL links are configured, connectivity might not be possible between certain rings if a Token Ring or ATM link is the forwarding path to the root switch instead of an ISL link. This problem can cause the switch on the other end of a blocked ISL link to incorrectly limit all-routes explorer packets to the incoming TrCRF. This results in some stations not being able to communicate with other stations.
Recommended Action: Ensure that the STP path costs are configured such that the ISL port is the preferred path. In an ISL connected switch network configuration, a Token Ring or ATM link should never have a lower cost to the root bridge than the ISL link.
Availability of Catalyst 5000 Software Upgrades on CCO
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.
Obtaining Service and Support
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.
Note
For service and support for a product purchased directly from Cisco, use CCO.
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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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Ordering Documentation
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