Table Of Contents
Catalyst 5000 Series Token Ring Software Release 3.3(3) Release Note
Token Ring Orderable Software Images
Problems Fixed in Token Ring Software Release 3.3(3)
Known Problems in Token Ring Software Release 3.3(3)
New Features in Token Ring Software Release 3.3(x)
Updating the Token Ring Module EPLDs
Determining Whether You Need to Update Your Token Ring Module EPLDs
Token Ring EPLD Update Commands
Configuring Explorer Throttling
set tokenring explorer-throttle Command
Configuring Soft Error Monitoring and Removing Adapters
Enabling or Disabling Soft Error Monitoring on a Port
Configuring Soft Error Monitoring Error Thresholds and Sampling Intervals
Verifying the Soft Error Monitoring Configuration
Removing an Adapter from the Network
Soft Error Monitoring Commands
show station softerror counters
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
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
Availability of Catalyst 5000 Software Upgrades on CCO
Catalyst 5000 Series Token Ring Software Release 3.3(3) Release Note
April 7, 2000
This document describes the Catalyst 5000 series Token Ring software release 3.3(3), including a list of problems fixed in this release and a list of known (open) problems for this release. Use this document in conjunction with the Catalyst 5000 Series Token Ring Module Configuration Note or the Catalyst 5000 Series Fiber Token Ring Module Configuration Note that ships with the copper (WS-X5030) and fiber (WS-X5031) Token Ring modules. The latest version of the configuration note ships with the Catalyst 5000 series Token Ring modules and is also available via Cisco Connection Online (CCO).
Sections in this document include the following:
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Token Ring Orderable Software Images
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Catalyst 5000 Documentation
The following documents are available for the Catalyst 5000 series switch:
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Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the tabular and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
Token Ring Orderable Software Images
lists the software version and applicable ordering information for the Catalyst 5000 series Token Ring module software.
Problems Fixed in Token Ring Software Release 3.3(3)
The following problems have been resolved in this release of the Token Ring software.
CSCdp90340
The output of the show station ordertable command incorrectly displays the MAC addresses of stations monitored via Token Ring ports.
CSCdr00852
Occasionally, some Token Ring ports might be marked as faulty because the ports failed the loopback test during initialization. This is a false failure and resetting the Token Ring module will return the Token Ring ports to a normal state. This fix requires that the Token Ring module erasable programmable logic device (EPLD) images be updated. For information on updating the EPLD images, see the "Updating the Token Ring Module EPLDs" section.
Known Problems in Token Ring Software Release 3.3(3)
There are no known problems in the Catalyst 5000 series Token Ring software release 3.3(3).
New Features in Token Ring Software Release 3.3(x)
This section describes the new features that are supported in the Catalyst 5000 series Token Ring software release 3.3(x) or later.
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Updating the Token Ring Module EPLDs
Note
The Token Ring software release 3.3(2) or later is bundled with two erasable programmable logic devices (EPLDs) images (epld_par and epld_fif). When the Token Ring software release 3.3(2) or later is used in conjunction with supervisor engine module software release 4.5(3) or later or supervisor engine module software release 5.3(1) or later, you can use the bundled images to update the EPLDs on your Token Ring module and fix certain conditions that might be occurring in your network. Before updating the EPLDs on your Token Ring module, determine whether you need to do so by performing the tasks in the "Determining Whether You Need to Update Your Token Ring Module EPLDs" section.
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Determining Whether You Need to Update Your Token Ring Module EPLDs
Before updating the EPLDs on your Token Ring module, you should determine whether you need to do so. To determine whether you need update the EPLD images on your Token Ring module, after downloading the Token Ring release 3.3(2) or later software, query EPLD version information by issuing the following command:
show tokenring [mod_num/[port_num]]
In addition to the current values of various Token Ring specific configuration parameters, the show tokenring command displays the current versions of the Token Ring module EPLDs and the versions of the EPLD images bundled with the Token Ring software image that you downloaded and stored in the module Flash.
After issuing the show tokenring command, you see will see a display that includes information similar to the following:
<partial show tokenring command output>Token Ring EPLDs FLASH EPLD---------------- ----- ----epld_fif 5 0epld_par 5 0If you are running a Token Ring module on which the EPLDs are version 3 or lower, and you are experiencing one or both of the following conditions in your network, you should consider updating the EPLD images with the images bundled in the Token Ring software release 3.3(2) or later:
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If you are running a Token Ring module on which the Fifocontroller EPLD (epld_fif) is version 5 or lower, and you are experiencing the following condition in your network, you should consider updating the EPLD images with the images bundled in the Token Ring software release 3.3(3) or later:
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Note
For information on updating your Token Ring module EPLDs, proceed to the "Updating the EPLDs" to update your EPLDs with the bundled images. If the EPLD versions in the EPLD column are version 6 or higher, you do not need to update your EPLDs.
Updating the EPLDs
If you have determined that you need to update the EPLDs on your Token Ring module, ensure that you review the information in this section before doing so.
You should update the EPLDs with caution and only when absolutely necessary. The procedure for updating your Token Ring module EPLDs requires that you reset your Catalyst 5000 series chassis, therefore, ensure that you schedule to update the EPLDs during a time that will have the least impact on your network operations.
Caution
To update the EPLD images, complete the following tasks:
Step 1
set tokenring microcode
Note
Caution
After entering the set tokenring microcode command, you see a display similar to the following:
Console>(enable) set tokenring microcodeWARNING! Do not reset token ring module(s) during this operation. Otherwisemodule(s) may be damaged. If a targeted token ring module is utilized for thisconsole connection, the connection will disappear during the operation.This operation may take up to 20 minutes to complete.Do you want to continue (y/n) [n]?Wait for specified module(s) to remove and insert before resetting.Initiating microcode update sequence to module 4....Initiating microcode update sequence to module 5....Console>(enable) 1999 June 07 18:37:36 %SYS-5-MOD_REMOVE:Module 4 has been removed1999 June 07 18:37:36 %SYS-5-MOD_INSERT:Module 4 has been inserted1999 June 07 18:37:43 %SYS-5-MOD_REMOVE:Module 5 has been removed1999 June 07 18:37:43 %SYS-5-MOD_INSERT:Module 5 has been inserted1999 June 07 18:41:03 %SYS-5-MOD_OK:Module 4 is online1999 June 07 18:41:06 %SYS-5-MOD_OK:Module 5 is onlineThe EPLD update can take as little as 2 minutes or as long as 20 minutes to complete. When the update has completed, the Port Status LED (top left corner of each RJ-45 connector) on ports 1 and 5 turns green and the Token Ring module automatically resets.
Step 2
1999 June 07 18:37:36 %SYS-5-MOD_INSERT:Module 4 has been removed1999 June 07 18:37:36 %SYS-5-MOD_INSERT:Module 4 has been inserted1999 June 07 18:41:03 %SYS-5-MOD_OK:Module 4 is onlineIn the above example, the EPLDs were updated on a Token Ring modules installed in slot 4 of the switch.
Step 3
reset mod_num
Where mod_num is the slot in which the supervisor engine module is installed.
Token Ring EPLD Update Commands
The following commands have been added or modified to support updating the Token Ring module EPLD images with the images bundled with the Token Ring software release 3.3(2) or later.
set tokenring microcode
Use the set tokenring microcode privileged command to initiate the updating of the Token Ring EPLDs.
set tokenring microcode
Syntax Description
This command has no arguments or keywords.
Default
This command has no defaults. This command is directed to all Token Ring cards in the switch.
Command Type
Switch command.
Command Mode
Privileged
Usage Guideline
The EPLD images in the main executable on each Token Ring module are updated with the appropriate EPLD images bundled with the Token Ring software release 3.3(2) or later. If an EPLD image version in Flash matches an existing EPLD version, the EPLD image on the Token Ring module is not updated. Each Token Ring module resets after the update is complete.
Caution
Examples
The following example shows the set tokenring microcode command output on a Catalyst 5000 series switch in which two Token Ring modules are installed in slots 4 and 5:
Console>(enable) set tokenring microcodeWARNING! Do not reset token ring module(s) during this operation. Otherwisemodule(s) may be damaged. If a targeted token ring module is utilized for thisconsole connection, the connection will disappear during the operation.This operation may take up to 20 minutes to complete.Do you want to continue (y/n) [n]?Wait for specified module(s) to remove and insert before resetting.Initiating microcode update sequence to module 4....Initiating microcode update sequence to module 5....Console>(enable) 1999 June 07 18:37:36 %SYS-5-MOD_REMOVE:Module 4 has been removed1999 June 07 18:37:36 %SYS-5-MOD_INSERT:Module 4 has been inserted1999 June 07 18:37:43 %SYS-5-MOD_REMOVE:Module 5 has been removed1999 June 07 18:37:43 %SYS-5-MOD_INSERT:Module 5 has been inserted1999 June 07 18:41:03 %SYS-5-MOD_OK:Module 4 is online1999 June 07 18:41:06 %SYS-5-MOD_OK:Module 5 is onlineshow tokenring
Use the show tokenring command to display the current values of various Token Ring specific configuration parameter in addition to the current versions of the Token Ring module EPLD images and the versions of the EPLD images bundled with the Token Ring software release 3.3(2) or later that has been downloaded and stored in the Token Ring module flash:
show tokenring [mod_num[/port_num]]
Syntax Description
mod_num
(Optional) Number of the Token Ring module.
port_num
(Optional) Number of the port on the module.
Default
The default of this command is to display the configuration information for all Token Ring modules in the switch.
Command Type
Switch command.
Command Mode
Normal.
Usage Guideline
The show tokenring command has been extended to display the EPLD version information on one or all Token Ring modules in the switch.
Examples
This example shows the EPLD-specific show tokenring output, which displays after the issuing the show tokenring command. The FLASH column indicates the version of the EPLD image that is bundled into the Token Ring software release 3.3(2) or later executable. The EPLD column indicates the version of the EPLD image that is burned inside of the corresponding EPLD.
<partial show tokenring command output>Token Ring EPLDs FLASH EPLD---------------- ----- ----epld_fif 5 0epld_par 5 0Configuring Explorer Throttling
Note
With this release of the Token Ring software, the number of explorer frames being forwarded by a Token Ring port can be limited. Limiting the number of explorer frames being forwarded by a Token Ring port is helpful in networks in which high levels of explorer traffic occur.
To configure the number of explorer frames that can be forwarded per second by a Token Ring port, issue the following command while in privileged mode:
set tokenring explorer-throttle mod_num/port_num max_explorers
After issuing the set tokenring explorer-throttle command, you see a display similar to the following:
Console> (enable) set token explorer-throttle 5/1 100Explorer throttling set to 100 explorers/sec for port 5/1set tokenring explorer-throttle Command
The set tokenring explorer-throttle command has been added to enable explorer throttling to be configured. Use the set tokenring explorer-throttle command to control the number of explorer frames being forwarded per second by a Token Ring module port.
set tokenring explorer-throttle mod_num/port_num max_explorers
Syntax Description
mod_num
Number of the Token Ring module.
port_num
Number of the port on the module.
max_explorers
Maximum number of explorer frames (per second) allowed to be forwarded by the Token Ring port.
Default
The default is 0; explorer frame throttling is disabled.
Command Mode
Privileged
Usage Guidelines
To disable explorer frame throttling, specify 0 for the max_explorers value.
If the maximum explorer threshold is reached on a port, subsequent explorer frames are dropped until the next one-second interval.
Example
This example shows how to limit the number of explorer frames being forwarded per second by a Token Ring port to 100:
set tokenring explorer-throttle 2/1 100
Configuring Soft Error Monitoring and Removing Adapters
The Catalyst 5000 series Token Ring module software release 3.3(1) or later performs error detection and isolation by monitoring the Report Soft Error MAC frames generated by stations on each port. Soft errors occur during normal ring operation and do not typically disrupt traffic on the ring. However, soft errors can occur at a rate that could potentially degrade the performance of the ring.
Using the soft error monitoring feature, you can configure soft error thresholds and sampling intervals for a port. During the interval you define, the Catalyst 5000 series Token Ring module monitors the stations on the port and, if the threshold is exceeded, can be configured to generate a trap indicating the port number and station on which the threshold was exceeded. If necessary, you can issue a Remove Ring Station MAC frame to remove the station from the ring.
In summary, the Catalyst 5000 series Token Ring module performs the following tasks:
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Enabling or Disabling Soft Error Monitoring on a Port
Using the set station softerror command, you can enable or disable soft error monitoring on a Token Ring port and you can configure soft error thresholds and sampling intervals for a port. During the interval you define, the Catalyst 5000 series Token Ring module monitors the stations on the port and, if the threshold is exceeded, generates a trap indicating the port number and station on which the threshold was exceeded. If necessary, you can issue a Remove Ring Station MAC frame to remove the station from the ring.
To enable or disable soft error monitoring on a Token Ring port, issue the following command in privileged mode:
set station softerror mod_num | mod_num/port_num disable | enable
Note
After enabling soft error monitoring on a port using the set station softerror command, you see a display similar to the following:
Console> (enable) set station softerror 3/10 enablePort 3/10 soft error monitoring enabled.Console> (enable)Configuring Soft Error Monitoring Error Thresholds and Sampling Intervals
To configure a soft error monitoring error threshold (the number of soft errors reported from a station connected to a port that if exceeded causes a soft error exceeded trap to be issued) and to define a sampling interval (the period, in seconds, during which the number of soft errors is monitored for each station connected to this port) issue the following command while in privileged mode:
set station softerror mod_num[/port_num] threshold threshold_num interval int_num
The possible values for the error threshold are 1 to 255. The default is 100. The possible values for the sampling interval are 0 to 65534. The default is 60. Setting the interval to zero disables the soft error exceeded traps. Without these traps, soft errors can still be monitored via the console.
Note
After configuring the error threshold and sampling interval using the set station softerror command, you will see a display similar to the following:
Console> (enable) set station softerror 3/10 threshold 100 interval 200Port 3/10 station soft error threshold set to 100, interval set to 200Console> (enable)Verifying the Soft Error Monitoring Configuration
To verify your soft error monitoring configuration on a port, issue the following command while in privilege mode:
show station softerror config mod_num[/port_num]
Note
After entering the show station softerror config command to verify the configuration on a port, you will see a display similar to the following:
Console> (enable) show station softerror config 3/10Ports Threshold Interval Status----- --------- -------- --------3/10 100 200 enabledConsole> (enable)Removing an Adapter from the Network
If a station is exceeding soft error thresholds, you can issue a Remove Ring Station MAC frame to remove the station from the ring. When issuing the clear station command, enter the MAC address in non-canonical format (00:11:22:33:44:55).
clear station mod_num/port_num mac_addr
Caution
Soft Error Monitoring Commands
The following commands that support soft error monitoring configuration and management are available in the Catalyst 5000 series supervisor engine module software release 5.1(1) or later used in conjunction with the Catalyst 5000 series Token Ring software release 3.3(1) or later.
clear station
Use the clear station privileged command to issue a Remove Ring Station MAC frame to remove a station from the ring.
clear station mod_num/port_num mac_addr
Syntax Description
Default
The command has no default setting.
Command Type
Switch command
Command Mode
Privileged
Usage Guidelines
Issuing the clear station command and specifying the MAC address or ID of a station issues a Remove Station MAC frame to that station and removes the station from the ring. Use this procedure with extreme caution.
Example
The following example shows a station with the MAC address 00:40:0b:01:bc:65 on port 2 of module 3 being removed:
Console> (enable) clear station 3/2 00:40:0b:01:bc:65Mac Address 00:40:0b:01:bc:65 cleared.Console> (enable)Related Commands
set station softerror
show station softerror config
show station softerror countersclear station counters
Use the clear station counters privileged command to reset the soft error statistics that display when you issue the show station softerror counters command. You can clear statistics collected for a station on a port, the module, or for a specific port on the module.
clear station counters mod_num[/port_num]
Syntax Description
Default
The command has no default setting.
Command Type
Switch command
Command Mode
Privileged
Example
The following example shows the soft error statistics collected for stations on port 10 of module 3 being reset:
Console> (enable) clear station counters 3/10Port 3/10 station counters cleared.Related Commands
set station softerror
show station softerror countersset station softerror
Use the set station softerror privileged command to enable or disable the collection of soft error statistics on the ports on a Token Ring module or on a specific port on the module. Also, use the set station softerror command to define error thresholds and sampling intervals for the ports on the Token Ring module or for a specific port on the module.
set station softerror mod_num[/port_num] disable | enable
set station softerror mod_num[/port_num] [threshold thres_num interval int_num]
Syntax Description
Default
The default configuration has soft error monitoring disabled. The default error threshold is 100. The default interval is 60.
Command Type
Switch command
Command Mode
Privileged
Example
The following example shows how to enable the collection of soft error statistics for port 10 on module 3:
Console> (enable) set station softerror 3/10 enablePort 3/10 soft error monitoring enabled.Console> (enable)The following example shows the error threshold and sampling interval for port 10 on module 3 being set:
Console> (enable) set station softerror 3/10 threshold 100 interval 200Port 3/10 station soft error threshold set to 100, interval set to 200Console> (enable)Related Commands
clear station counters
show station softerror config
show station softerror countersshow station softerror config
Use the show station softerror config normal command to view the soft error monitoring configuration for a port, module, or for all the Token Ring modules in a switch.
show station softerror config [mod_num[/port_num]
Syntax Description
mod_num
(Optional) Number of the module.
port_num
(Optional) Number of the port on the module. If you do not specify a number, all ports are shown.
Default
This command has no default setting.
Command Type
Switch command
Command Mode
Normal
Example
The following example shows how to display the soft error monitoring configuration for module 3:
Console> show station softerror config 3Ports Threshold Interval Status----- --------- -------- --------3/1 100 60 enabled3/2 100 60 enabled3/3 100 60 enabled3/4 100 60 enabled3/5 100 60 enabled3/6 100 60 enabled3/7 100 60 enabled3/8 100 60 enabled3/9 100 60 enabled3/10 100 200 enabled3/11 100 60 enabled3/12 100 60 enabled3/13 100 60 enabled3/14 100 60 enabled3/15 100 60 disabled3/16 100 60 disabledConsole>describes the fields shown in the show station softerror config command output.
show station softerror counters
Use the show station softerror counters normal command to view the soft error statistics collected for all the stations on a Token Ring port or for a specific station.
show station softerror counters mod_num/port_num [mac_addr]
Syntax Description
Default
This command has no default setting.
Command Type
Switch command
Command Mode
Normal
Example
The following example shows how to display the soft error statistics collected for:
Console> (enable) show station softerror counters 3/1Port 3/1:Station 00:06:c1:0e:e1:40 Station-Last-NAUN 00:05:77:06:29:b0In-Burst-Errors 9Out-Burst-Errors 3Token-Errors 11Station 00:05:77:06:29:b0 Station-Last-NAUN 00:00:00:00:00:00Out-Burst-Errors 1Station 00:05:77:06:29:b2 Station-Last-NAUN 00:00:00:00:00:00Out-Burst-Errors 5Station 00:05:77:06:29:b1 Station-Last-NAUN 00:00:00:00:00:00Station 00:05:77:06:29:b3 Station-Last-NAUN 00:00:00:00:00:00Station 00:05:77:06:29:af Station-Last-NAUN 00:06:c1:0e:e1:40Console> (enable)describes the fields shown in the show station softerror counters command output.
Table 3 Show station softerror counters Command Field Descriptions
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 locallearning 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:
Amendments to the Documentation
This section contains information that was not included in the first release of the configuration note.
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 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.
Token Ring Port Operation
The descriptions of the Token Ring port transmission modes in the Catalyst 5000 Software Configuration Guide are incorrect. The descriptions should read as follows:
Each of the 16 Token Ring ports on the Catalyst 5000 series Token Ring module can operate in one of the following modes:
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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.
Configuring VLANs
In addition to the guidelines and restrictions listed in the configuration note, when configuring a TrBRF, note that you cannot assign more than 63 TrCRFs to a TrBRF.
Adding or Changing TrBRF Parameters
The Catalyst 5000 series Token Ring software release 3.2(1) or 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) or 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. 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.
When configuring Token Ring SPAN, 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} dest_mod/dest_port [rx | tx | both] [inpkts {enable | disable}]
[multicast {enable | disable}] [create]
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 spanDestination : Port 3/6Admin Source : Port 3/2Oper Source : Port 3/2Direction : transmitIncoming Packets: disabledMulticast : enabledConsole> (enable)describes the information returned by the show span command.
Table 4 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 other3/7 0 0 other3/8 0 0 other3/9 0 0 other3/10 0 0 other3/11 0 0 other3/12 0 0 other3/13 0 0 other3/14 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 23/2 00:00:00:00:00:00 00:00:00:00:00:00 13/3 00:00:00:00:00:00 00:00:00:00:00:00 43/4 00:00:00:00:00:00 00:00:00:00:00:00 53/5 00:00:00:00:00:00 00:00:00:00:00:00 63/6 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
Guest
