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Configuring FDDI Software

Configuring FDDI Software

This chapter describes how to configure the FDDI software of the Cisco Catalyst 1800 Token Ring switch. It contains the following sections:

Accessing the Configuration Menu

The Configuration menu allows you to define the nonsecurity functions available on the FDDI board. Normally, the default for each parameter is listed on the corresponding menu.

To use the Configuration menu, type the following from the Main menu:

Configure

The Configuration menu appears, followed by a prompt for a menu selection:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink


Select From

Bridge
IP
Logical Segments
NetBIOS
Physical Ports
Port Priority
Prompt
Serial Port
SNMP
STP Ports
System
TFTP


Catalyst 1800> Configure
Enter Next Configuration Menu Selection

From this menu you can access the submenus that allow you to change various configuration parameters. We recommend you use the abbreviated text recognition feature described in the section "Abbreviated Text Recognition" in the chapter "Getting Started." For example, to access the configuration menu for the FDDI port, type the following command from the Main menu:

c ph fddi_port #

Configuring FDDI MAC Parameters

The MAC menu allows you to configure FDDI-specific media access control (MAC) parameters. To access the MAC menu, follow these steps.


Step 1   Type this command from the Main menu:

Configure Physical Ports

The system displays the following prompt:

Enter port number or 0 for setting all ports (FDDI Port = 5)

Step 2   Enter 5, the FDDI port number. The prompt reminds you that the FDDI port number is 5.

The Configuring Physical Port menu appears:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

Select From

Active Monitor
Address
Direct Attach
Early Release
MAC (FDDI)
Path (FDDI)
Port (FDDI)
Ring Speed
SMT (FDDI)
State
Display





Catalyst 1800>con phy 5 MAC

From this menu, you can select any FDDI parameter. You can also type the Display command to display 802.5 configuration information.

The following table describes the FDDI parameters on this menu and points to where you can find procedures describing their use.


Table 7-1:
Parameter Allows you to . . . For more information, see . . .

MAC (FDDI)

Set FDDI MAC parameters

"Configuring FDDI MAC Parameters"

Path (FDDI)

Set FDDI Path parameters

"Configuring FDDI Path Parameters"

Port (FDDI)

Set FDDI Port Parameters

"Configuring FDDI Port Parameters"

SMT (FDDI)

Set FDDI SMT Parameters

"Configuring FDDI SMT Parameters"

Configuration Menu Selections

Step 1   To change a FDDI MAC parameter on this menu, use this command:

c ph 5 m

The Configuring Physical Ports FDDI MAC menu appears, followed by a prompt for a menu item:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

Select From

Address
RequestedPaths
UnitDataEnable
Display





Catalyst 1800>con phy 5 MAC
Enter Next Menu Selection

When you specify one of the preceding parameters, the FDDI Configuration screen appears:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

FDDI Configuration

Primary Secondary
MAC PATH (Nanosecs) (Nanosecs)

Address: 00-05-77-ff-ff-06 MaxTReq: 165000000 165000000
RequestedPaths: LO, SA, PA TMaxLowerBound: 165000000 165000000
UnitDataEnable: True TVXLowerBound: 2500000 2500000

PORT A B SMT

Action/State: PC_Enable PC_Enable Action/State: Connect
ConnectPolicy: None None Bypass: Disable
LERAlarm: 8 8 RPTPolicy: True
LERCutoff: 7 7 Tnotify: 30 sec
ConnectPolicy: None None TraceMaxExp: 7000 ms
RequestedPaths: UserData: FDDI SMT v7.3
*None: LO LO ConnectPolicy: AA,AS,BB,BS,SA,SB,MM
*Tree: LO,CA,SP LO,CA,PP
*Peer: LO,CA,SP,TH LO,CA,PP,TH


Catalyst 1800> c ph 5 m a

The following table explains the MAC parameters on the FDDI Configuration screen. Other parameters are explained in subsequent sections.


Table 7-2: FDDI Configuration Parameters
Title Description

Address

The MAC address for the FDDI port. The system accepts any valid MAC address.

The default is the MAC address shipped with the product.

RequestedPaths

The list of permitted paths that specifies the path(s) into which the MAC address may be inserted. They are the following types:

Path Type Meaning

LO

Local. The local path refers to the segment(s) of ring(s), excluding the primary and secondary rings that pass through this node.

SA

Secondary-Alternate. The secondary path refers to the segment(s) of the secondary ring(s) that pass through this node.

PA

Primary-Alternate. The primary path refers to the segment(s) of the primary ring(s) that passes through this node.

CA

Concatenated-Alternate. Concatenated refers to the port inserted into both the primary and secondary paths in a concatenated wrap configuration.

SP

Secondary-Preferred

PP

Primary-Preferred

CP

Concatenated-Preferred. Concatenated refers to the port inserted into both the primary and secondary paths in a concatenated wrap configuration.

TH

Thru. Thru refers to the port inserted into both the primary and secondary paths in a thru configuration.

Three default values are enabled: LO, SA, and PA

UnitDataEnable

Controls access of high-level protocols to the frame transmission and reception services of the port. To allow higher level protocols to transmit and receive frames, set UnitDataEnable to True.

The default value is True.

Address


Step 1   To change the Address parameter (that is, the FDDI MAC address), type this command:

c f m a

The system displays the following prompt:

Enter 12-digit hex MAC address (ex. 0102030a0b0c)

Step 2   Type the new MAC address in noncannonical format (MSB) for the FDDI port and press Return.

The new parameter value appears on the FDDI Configuration screen (shown before Table 7-2).

RequestedPaths


Step 1   To change the RequestedPaths parameter, type this command:

c ph 5 m r

The system displays the following prompt:

Enter CA,CP,LO,PS,PP,SA,SP, or TH

Step 2   Choose the specific FDDI MAC RequestedPaths type you want to change. For example, to change the local from enable to disable, type this command:

c ph 5 m r l

The system displays the following prompt:

Enter Enable or Disable

Step 3   Type enable or disable and press Return.

The new parameter value appears on the FDDI Configuration screen (shown before Table 7-2).

UnitDataEnable


Step 1   To change the UnitDataEnable parameter, type this command:

c ph 5 m u

The system displays the following prompt:

Enter True or False

Step 2   Type True or False and press Return.

The new parameter value appears on the FDDI Configuration screen (shown before Table 7-2).

Configuring FDDI Path Parameters

The FDDI Path menu allows you to configure path parameter values. To access this menu, follow these steps.


Step 1   Type this command from the Main menu:

Configure Physical Port 5 Path

The system displays the following prompt:

Enter Primary or Secondary

Step 2   Enter Primary or Secondary and press Return.

The Configuring Physical Port menu appears, followed by a prompt for a menu selection:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

Select From

Active Monitor
Address
Direct Attach
Early Release
MAC (FDDI)
Path (FDDI)
Port (FDDI)
Ring Speed
SMT (FDDI)
State
Display





Catalyst 1800>con phy 5 MAC
Enter Next Menu Selection

Step 3   To change a parameter on this menu, use this syntax:

c ph 5 pa p

The Configuring Physical Ports FDDI Path menu appears:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

Select From

MaxTReq
TMaxLowerBound
TVXLowerBound
Display





Catalyst 1800>c ph 5 pa p

The system prompts you to type the appropriate value for the Token Rotation Timer (TRT). Each MAC address has a TRT used to control ring scheduling during normal operation. A TRT can also be used to detect and recover from serious ring error situations.

Caution Be very careful changing any FDDI Path parameters. They can seriously affect performance.

The following table describes the parameters on this screen.


Table 7-3: Physical Ports FDDI Path Menu Selections
Selection Description

MaxTReq

The maximum time value of the requested target token rotation time (TTRT). For more information, see the section "MaxTReq."

The range is TVXLowerBound < MaxTReq <=TMaxLowerBound.

The default is 165,000,000 nsec.

TMaxLowerBound

Specifies the minimum time value of the maximum TTRT this station supports.

The time value range is MaxTReq <= TMaxLowerBound.

The default is 165,000,000 nsec.

TVXLowerBound

Specifies the minimum time value of the maximum available time between valid transmissions. The station uses this value to recover from ring error conditions.

The value range is 0 to 2147483647.

The default is 2,500,000 nsec.

MaxTReq

The MaxTReq parameter specifies the maximum time value of the requested target token rotation time (TTRT), in nanoseconds, for this station's synchronous traffic. The TTRT is the time limit within which the station expects to receive and use the token. The TTRT for the ring is determined at ring initialization, when each station declares what it wants the TTRT to be. (This process is called bidding.)


Step 1   To change the MaxTReq parameter value, type this command:

c ph 5 pa p m

The system displays the following prompt:

Enter MaxTReq (range: TVXLowerBound < MaxTReq <= TMaxLowerBound)

Step 2   Type the new FDDI Primary Path MaxTReq value for the FDDI port and press Return. The value must be greater than that of the TMaxLowerBound parameter and less than or equal to that of the TMaxLowerBound parameter.

The new parameter value appears on the FDDI Configuration screen.

TMaxLowerBound


Step 1   To change the TMaxLowerBound parameter, type this command:

c ph 5 pa p tm

The system displays the following prompt:

Enter TMaxLowerBound (range: MaxTReq <= TMaxLowerBound)

Step 2   Type the new value and press Return. The value must be greater than or equal to that of the MaxTReq parameter.

The new parameter value appears on the FDDI Configuration screen.

TVXLowerBound


Step 1   To change the TVXLowerBound parameter, type this command:

c ph 5 pa p tv

The system displays the following prompt:

Enter TVXLowerBound (range: 0 < TVXLowerBound < MaxTReq)

Step 2   Enter the new value and press Return. The value must be greater than 0 and less than that of the MaxTReq parameter. The new parameter value appears on the FDDI Configuration screen.

Configuring FDDI Port Parameters

The FDDI Port menu allows you to configure FDDI Port parameters. To access this menu, follow these steps.


Step 1   Type this command from the Main menu:

con phy 5 po a

The system displays the following prompt:

Enter Port number A or B

The FDDI Port Configuration menu appears, followed by a prompt for a menu selection:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

Select From

Action
ConnectionPolicy
LERAlarm
LERCutoff
RequestedPaths
Display


Catalyst 1800>con phy 5 po a

Step 2   To change a parameter for port A on this menu, type this command:

c ph 5 po a menu_selection

The following table describes the parameters.


Table 7-4: FDDI Port Configuration Parameters
Title Description

Action/State

A value representing the type of action taken on the port. The hardware port is implemented through a physical connection management (PCM) state machine that defines the rules governing the allowable topologies in an FDDI ring. You can perform the following actions:

Action Meaning

PC_Maint

Generates a signal to PCM indicating that the PCM state machine should enter the maint state. This value causes a transition to maint state only when the signal is issued while the PCM state machine is in the off state.

PC_Enable

Generates a signal to PCM indicating that the PCM state machine should cause a transition from maint state to the off state.

PC_Disable

Generates a signal to PCM indicating that the PCM state machine should cause a transition to the maint state. This value causes a transition to the maint state from any state of the PCM.

PC_Start

Generates a signal to PCM indicating that the PCM state machine should enter the break state. ECM signals PC_Start to start the PCM state machine.

PC_Stop

Generates a signal to PCM indicating that the PCM state machine should enter the off state. This value causes a transition to the off state from any state of the PCM except the maint state.

There is no default value.

ConnectionPolicy

A value representing the port's connection policies desired in the node.

Value Meaning

None

There is no connection policy.

LCT

The link confidence test. The MAC is used to run the link confidence test to determine if the test passed or failed.

Loop

The local loop test. Run this test before a connection is made active to determine if the test passed or failed.

The default value is None.

LERAlarm

The link error rate at which a link connection exceeds a preset alarm threshold. It ranges from 10-4 to 10-15 and is reported as the absolute value of the base 10 logarithm.

The range is 4 to 15.

The default is 8.

For example, a value of 4 indicates that the link error rate is 10-4 or one error in 10, 000 frames.

LERCutoff

The link error rate estimate at which a link connection will be broken. It ranges from 10-4 to 10-15 and is reported as the absolute value of the base 10 logarithm.

The default is 7.

The range is 4 to 15.

For example, a value of 4 indicates that the link error cutoff rate is 10-4 or one error in 10, 000 frames.

RequestedPaths

A list of permitted paths where each list element defines the port's permitted paths. For descriptions of these port defaults, see Table 7-2.

Value Meaning

Peer(P)

Neither the port currently under control nor the port at the other end of the connection is of type M (an FDDI concentrator).

Tree(T)

A port at one end of the connection is of type M.

None (N)

Nothing has been established.

Port A Defaults Port B Defaults

None: LO

LO

Tree: LO, CA, SP

LO, CA, PP

Peer: LO, CA, SP, TH

LO, CA, PP, TH

Action

Caution Be careful changing any FDDI port action parameter. If you want to enable or disable the FDDI port, refer to the SMT section called "Action."

Step 1   To change the Action parameter value for port A, type this command:

c ph 5 po a a

The system displays the following prompt:

Enter PC_Enable,PC_Disable,PC_Maint,PC_Start,or PC_Stop

Step 2   Type the new Action parameter value for the FDDI port and press Return.

The new parameter value appears on the FDDI Configuration screen.

ConnectPolicy


Step 1   To change the ConnectPolicy parameter value for port A, type this command:

c ph 5 po a c

The system displays the following prompt:

Enter LCT or Loop

Step 2   Type LCT to indicate the link confidence test or Loop to indicate a local loop test.

The system displays the following prompt:

Enter Enable or Disable

Step 3   Type Enable or Disable and press Return.

The new parameter value appears on the FDDI Configuration screen.

LERAlarm


Step 1   To change the LERAlarm parameter value for port A, type this command:

c ph 5 po a lera

The system displays the following prompt:

Enter Link Error Rate Alarm (range: 4-15)

Step 2   Type the new parameter value and press Return.

The new parameter value appears on the FDDI Configuration screen.

LERCufoff


Step 1   To change the LERCutoff parameter value for port A, type this command:

c ph 5 po a lerc

The system displays the following prompt:

Enter Link Error Rate Cutoff (range: 4-15)

Step 2   Type the new parameter value and press Return.

The new parameter value appears on the FDDI Configuration screen.

RequestedPaths


Step 1   To change the RequestedPaths parameter value for port A, type this command:

c ph 5 po a r

The system displays the following prompt:

Enter None, Tree, or Peer

Step 2   Type none, tree, or peer and press Return.

The system responds:

Enter CA,CP,LO,PA,PP,SA,SP, or TH

Step 3   Enter the path value and press Return. The system displays the following prompt:

Enter Enable or Disable

Step 4   Type Enable or Disable and press Return.

The new parameter value appears on the FDDI Configuration screen.

Configuring FDDI SMT Parameters

The FDDI SMT menu allows you to configure FDDI SMT parameters. To access this menu, follow these steps.


Step 1   Type this command from the Main menu:

con phy 5 sm

The Configuring Physical Ports FDDI SMT menu appears, followed by a prompt for a menu selection:

Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink

Select From

Action
Bypass
ConnectPolicy
RPTPolicy
TNotify
TraceMaxExp
UserData
Display






Catalyst 1800> con phy 5 sm
Enter Next Menu Selection

Step 2   To change a parameter on this menu, use this syntax:

c ph 5 smt parameter_name

The system prompts you to type the appropriate value.

The following table describes the parameters.


Table 7-5: Physical Ports FDDI SMT Menu Selections
Selection Description

Action/State

A value representing the type of action taken on the station. The following actions are
available:

Action Result

Connect

Generates a connect message for this station to join the ring. To enable both port A and B of the FDDI port, issue a Connect action.

DisableA

Generates a PC-stop signal to port A. To disable only port A of the FDDI port, issue a DisableA action.

DisableB

Generates a PC-stop signal to port B. To disable only port B of the FDDI port, issue a DisableB action.

Disconnect

Generates a disconnect sequence to remove this station from the ring. To disable both port A and B of the FDDI port, issue a Disconnect action.

PathTest

Generates a message to perform a station path test

SelfTest

Generates a message to perform a station self test

Bypass

If set to Enable, the bypass switch is enabled, if present. If set to Disable, the bypass switch is disabled.

The default is Disable.

ConnectPolicy

The rejection list of connection types. The connection rules matrix that follows summarizes the validity of, and the action to be taken for, each type of connection. For more information, see the section entitled "ConnectionPolicies."

Policy Rule

AA

Reject A-A

AB

Reject A-B

AS

Reject A-S

AM

Reject A-M

BA

Reject B-A

BB

Reject B-B

BS

Reject B-S

BM

Reject B-M

SA

Reject S-A

SB

Reject S-B

SS

Reject S-S

SM

Reject S-M

MA

Reject M-A

MB

Reject M-B

MS

Reject M-S

MM

Reject M-M

The default is AA, AS, BB, BS, SA, SB, and MM. This means that these seven connection types are excluded from the connection and that the remaining connection types (such as MS) are valid.

RPTPolicy

If you specify True, the node sends a status reporting frame when there is a change in configuration.

The valid values are True or False.

The default value is True.

TNotify

Causes a neighbor notification frame to be sent in the specified time interval. The range is from 2 to 30 seconds.

The default value is 30 seconds.

TraceMaxExp

The maximum propagation time for a trace on an FDDI ring

UserData

This variable contains 32 characters of user-defined information. The information is expressed in an ASCII string, which you can modify to reflect your needs.

The range is from 1 to 32 characters.

The default value is FDDI SMT v7.3.

Action


Step 1   To change the value of the Action parameter, type this command:

c ph 5 sm a

The system displays the following prompt:

Enter Connect, Disconnect, DisableA, DisableB, PathTest, or SelfTest

Step 2   Enter an action from the Configuring Physical Ports FDDI SMT Action menu and press Return.

The new parameter value appears on the FDDI Configuration screen.

Bypass


Step 1   To change the value of the Bypass parameter, type this command:

c ph 5 sm b

The system displays the following prompt:

Enter Enable or Disable

Step 2   Enter Enable or Disable and press Return.

The new parameter value appears on the FDDI Configuration screen.

ConnectionPolicies

The ConnectionPolicies parameter specifies the rejection list of connection types for ports at both ends of a physical connection. The types of ports (A, B, S, or M) determine the characteristics of the physical connection. These characteristics include whether the connection is accepted or rejected, whether SMT is notified of potential connection problems, and the connection mode that is established.

A connection may be rejected to prevent the establishment of illegal or undesirable topologies. It may also be rejected by a neighboring node because of that node's inability to support the connection.


Step 1   To change the value of the ConnectionPolicies parameter, type this command:

c ph 5 sm conn

The system displays the following prompt:

Enter AA,AB,AS,AM,BA,BB,BS,BM,SA,SB,SS,SM,MA,MB, or MS

Step 2   Enter the new ConnectionPolicies value and press Return.

For example, enter c ph 5 sm conn AA and press Return.

The system displays the following prompt:

Enter Enable or Disable

Step 3   Type the new parameter value and press Return.

The new parameter value appears on the FDDI Configuration screen.

RptPolicy


Step 1   To change the value of the RptPolicy parameter, type this command:

c ph 5 sm rpt

The system displays the following prompt:

Enter True or False

Step 2   Type True or False and press Return.

The new parameter value appears on the FDDI Configuration screen.

TNotify


Step 1   To change the value of the TNotify parameter, type this command:

c ph 5 sm tn

The system displays the following prompt:

Enter Tnotify (range 2-30 seconds)

Step 2   Enter the value and press Return.

The new parameter value appears on the FDDI Configuration screen.

TraceMaxExp


Step 1   To change the value of the TraceMaxExpirations parameter, type this command:

c ph 5 sm tr

The system displays the following prompt:

Enter TraceMaxExpiration (range: >6001773 micro sec)

Step 2   Enter the value and press Return.

The new parameter value appears on the FDDI Configuration screen.

UserData


Step 1   To change the value of the UserData parameter, type this command:

c ph 5 sm u

The system displays the following prompt:

Enter User Data (range: 0-32 characters)

Step 2   Enter the value and press Return.

The new parameter value appears on the FDDI Configuration screen.


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Posted: Tue Dec 17 18:46:08 PST 2002
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