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This chapter describes how to configure the FDDI software of the Cisco Catalyst 1800 Token Ring switch. It contains the following sections:
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 (see Figure 7-1), listing the options you can access.
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
The system displays the following prompt:
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 #
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:
Step 2 Enter the FDDI port number. Note that the prompt lists the default as 5.
The Configuring Physical Port menu appears (see Figure 7-2).
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
The following table describes the FDDI parameters on this menu and points to where you can find procedures describing their use.
| 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" |
Step 1 To change a FDDI MAC parameter on this menu, use this syntax:
c ph 5 m
The Configuring Physical Ports FDDI MAC menu appears (see Figure 7-3) and the system displays the following prompt:
Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink
Select From
Address
RequestedPaths
UnitDataEnable
Display
Catalyst 1800>con phy 5 MAC
When you specify one of the preceding parameters, the FDDI Configuration screen appears (see Figure 7-4) .
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.
| 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 | ||
| SP | Secondary-Preferred | ||
| PP | Primary-Preferred | ||
| CP | Concatenated-Preferred. Cocatenated refers to the port inserted into both the primary and secondary paths in a cocatenated wrap configuration. | ||
| TH | Thru. Thru refers to the port inserted into both the primary and secondary paths in a thru configuration. | ||
| CA | Concatenated-Alternate. Cocatenated is defined as the port that is inserted in both the primary and secondary paths in a cocatenated wrap 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. | ||
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:
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 (see Figure 7-4).
Step 1 To change the RequestedPaths parameter, type this command:
c ph 5 m r
The system displays the following prompt:
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:
Step 3 Type enable or disable and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
Step 1 To change the UnitDataEnable parameter, type this command:
c ph 5 m u
The system displays the following prompt:
Step 2 Type True or False and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
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:
The system displays the following prompt:
Step 2 Enter Primary or Secondary and press Return.
The Configuring Physical Port menu appears (see Figure 7-2).
The system displays the following prompt:
Step 3 To change a parameter on this menu, use this syntax:
c ph 5 pa p
The following menu appears (Figure 7-5) and 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.
Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink
Select From
MaxTReq
TMaxLowerBound
TVXLowerBound
Display
Catalyst 1800>c ph 5 pa p
 | Caution Be very careful changing any FDDI Path parameters. They can seriously affect performance. |
The following table describes the parameters on this screen.
| 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. |
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:
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 (see Figure 7-4).
Step 1 To change the TMaxLowerBound parameter, type this command:
c ph 5 pa p tm
The system displays the following prompt:
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 (see Figure 7-4).
Step 1 To change the TVXLowerBound parameter, type this command:
c ph 5 pa p tv
The system displays the following prompt:
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 (see Figure 7-4).
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:
The FDDI Port Configuration menu appears (Figure 7-6) and displays the following prompt.
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.
| 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 a 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 | ||
| 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:
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 (see Figure 7-4).
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:
Step 2 Type LCT to indicate the link confidence test or Loop to indicate a local loop test.
The system displays the following prompt:
Step 3 Type Enable or Disable and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
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:
Step 2 Type the new parameter value and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
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:
Step 2 Type the new parameter value and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
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:
Step 2 Type none, tree, or peer and press Return.
The system responds:
Step 3 Enter the path value and press Return. The system displays the following prompt:
Step 4 Type Enable or Disable and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
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 po sm
The Configuring Physical Ports FDDI SMT menu appears (see Figure 7-7) and displays the following prompt:
Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink
Select From
Action
Bypass
ConnectionPolicy
RPTPolicy
TNotify
TraceMaxExp
UserData
Display
Catalyst 1800>con phy 5 po sm
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.
| Selection | Description | ||
|---|---|---|---|
Action/State | A value representing the type of action taken on the station. The following actions are | ||
| 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 "ConnectionPolicy." | ||
| 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". | ||
Step 1 To change the value of the Action parameter, type this command:
c ph 5 sm a
The system displays the following prompt:
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 (see Figure 7-4).
Step 1 To change the value of the Bypass parameter, type this command:
c ph 5 sm b
The system displays the following prompt:
Step 2 Enter Enable or Disable and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
The ConnectionPolicy 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 ConnectionPolicy parameter, type this command:
c ph 5 sm conn
The system displays the following prompt:
Step 2 Enter the new ConnectionPolicy and press Return.
For example, enter c ph 5 sm conn AA and press Return.
The system displays the following prompt:
Step 3 Type the new parameter value and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
Step 1 To change the value of the RptPolicy parameter, type this command:
c ph 5 sm rpt
The system displays the following prompt:
Step 2 Type True or False and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
Step 1 To change the value of the TNotify parameter, type this command:
c ph 5 sm tn
The system displays the following prompt:
Step 2 Enter the value and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
Step 1 To change the value of the TraceMaxExpirations parameter, type this command:
c ph 5 sm tr
The system displays the following prompt:
Step 2 Enter the value and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
Step 1 To change the value of the UserData parameter, type this command:
c ph 5 sm u
The system displays the following prompt:
Step 2 Enter the value and press Return.
The new parameter value appears on the FDDI Configuration screen (see Figure 7-4).
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