terminal emulator program or PC + putty terminal emulator) attached to the RS232 interface.
Configuration of the connection between the terminal and the switch (com2: 4800 n 8 2) is available at the computer assigned to the switch under ht icon (file/load IBM). Starting the terminal emulator program switch asks for an administrative password, which we should ask for the leader of the measurement. After giving the password switch occurs with the IBM_ATM# prompt, and is waiting for a command. We can ask for a list of commands, and after it a list of parameters with the "?".
Main functions of the switch
- ATM cell switching function
- Switch controlling functions:
- Management of functional units of IBM 8285
- Controlling of switches of ATM cells between the applicable interfaces
- Controlling of building of connection of ATM switched circuits
- Realization of the managing interface(through the SNMP or the ASCII/TELNET terminal) for monitoring, configuration, downloading of a firmware.
- Realization of a LAN Emulation, which supports the following issues:
- Integrated LAN Emulation Server (LES)/Broadcast and Unknown Server (BUS)
- Integrated LAN Emulation Client (LEC)
- LAN Emulation Configuration Server (LECS)
Technical data
- ATM connections
IBM 8285 supports the following types of connections:
- Permanent Virtual Connection (PVC)
Two types of PVCs are supported:
- PVC for virtual channel connections (VCC)
- PVC for virtual path connection (VPC), also known as permanent virtual path (PVP)
- Switched Virtual Connection (SVC)
Note: Switched virtual path (SVP) is not supported by the IBM 8285.
- Supported VPI and VCI Range
- For the 25 Mbps port:
- VPIs are in the range 0-3.
- VCIs are in the range of 32-1023.
- For the other ports:
- VPIs are in the range 0-15.
- VCIs are in the range of 32-1023.
- Supported Virtual Connection Types
- Unidirectional point-to-point -> No
- Bidirectional point-to-point with symmetric bandwidth -> Yes
- Bidirectional point-to-point with asymmetric bandwidth -> No
- Unidirectional point-to-multipoint -> Yes
- Bidirectional point-to-multipoint -> No
- Multipoint-to-multipoint -> No
- Maximum Number of Connections Supported
- The IBM 8285 has 4,096 connection control blocks.
- Each point-to-point connection requires two control blocks.
- Each party on a point-to-multipoint connection requires one connection
control block.
- The maximum number of point-to-point connections supported by an IBM
8285 with its expansion is 2,048 regardless the expansion unit installation.
- The maximum number of point-to-multipoint trees supported is 127.
- The maximum number of parties supported for all the point-to-multipoint
trees is 1024.
- The maximum number of PVCs is 100.
- The maximum number of point-to-point connection per media modules or
base unit is 2048 with Version 1.4 (was 992).
- The maximum number of parties for point-to-multipoint connections for the
base unit or per media module is 1024.
- The maximum number of point-to-point connection per 8285 port is 2048.
Detailed users' documentation:
Manual
