Cabletron Systems 9A426-01 User Manual
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9A426-01/9A426-02Module Specific Information

Modifying Fields and User Privileges

To modify fields on these modules, you must have read-writeorsuper-userprivileges. If you haveread-onlyprivileges, you can view information; however, you cannot modify any fields.

Virtual Channels and Virtual Paths

Rather than addressing cells to a specific destination, as in a LAN, ATM addresses cells to Virtual Channels (VCs) and/or Virtual Paths (VPs). This addressing takes place in the header field of the ATM cell.

VCs and VPs are bi-directional(i.e., they transfer information in both directions on a single channel or path) and are “set up” between devices on the ATM network prior to transmission. Similar to WAN transmission, ATM technology provides the ability of sending several VCs together over a VP, and several VPs over an ATM link segment.

Permanent and Switched Virtual Channels

ATM networks use two different types of Virtual Channels:

Permanent Virtual Channels (PVCs)

Switched Virtual Channels (SVCs).

The difference between PVCs and SVCs exists in the channel setup.

PVCs are pre-configuredby an administration function, and are usually established forlong-termuse. After setting up this channel, nothing else is required by the network to transfer information between the two established points. This type of virtual channelling is established through a local or remote management interface.

SVCs use a signaling and network switching procedure to set up dynamically. In other words, SVCs are established “on the fly,” as needed for a particular service, used to transmit on the short term, and then terminated.


9A426-01/9A426-02Module Specific Information

FNB Resource Configuration Screen

The 9A426-01/9A426-02 FNB Resource Configuration Screen (Figure 1), lists all possible connections a module can support on the FNB, displays the current connection, and allows you to change the connection.


SmartSwitch 9000

Local Management


FNB Resource Configuration

Module Name: 9A426-02

Firmware Revision: 01.00.01

Slot Number: 5


BOOTPROM Revision: 01.01.01

Current FDDI Con: (#2) FNB1<->ATM


Config ID

FDDI Connections














Figure 1. 9A426-01/9A426-02FNB Resource Configuration Screen


9A426-01/9A426-02Module Specific Information

FNB Resource Configuration Screen Fields

The following information briefly explains each FNB Resource Configuration Screen field.

Current FDDI Con:

Displays the current connections of the selected module to the

SmartSwitch 9000 FNB.

Config ID

Displays an identification number that is automatically assigned to each configuration.

FDDI Connections

Displays all possible connections of the selected module to the

SmartSwitch 9000 FNB.

Changing the Current FNB Connection

To change the current FNB connection:

1.Use the arrow keys to highlight the desired FDDI connection.

2.Press the Return key.

3.The connection you selected appears in the Current FDDI Con: field.

4.Use the arrow keys to highlight SAVE, then press theReturn key.

The message “SAVED OK” appears. This message indicates that the FNB connection you selected has been implemented. If you exit without saving, the message “NOT SAVED --PRESS SAVE TO KEEP CHANGES” appears, and the FNB connection you selected will not be implemented.

5.Use the arrow keys to highlight RETURN, then press theReturn key.