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This soft copy for use by IBM employees only.
- A lobe port to another concentrator
- A dedicated connection to a single device
- A connection to another token ring switch
- Operating at 4 or 16 Mbps
- Operating in half- or full-duplex mode
These automatic configuration capabilities can be disabled, for instance
when connecting to an auto-speed-sensing adapter.
− Support a transparent spanning tree configuration fully compliant with
IEEE 802.1d standards. This ensures that there is only one path active to
any segment in the network. The spanning tree function has
configurable parameters for both port cost and port priority, enabling
more accurate management of your network topology.
− Support a maximum frame size of 4540 bytes. In cut-through mode,
frames larger than 4540 bytes will be truncated and terminated with an
abort sequence. In store-and-forward mode, the switch port will reject
frames larger than 4540 bytes and will generate an error on the port.
•
Ethernet Features:
− Support 12 10Base-T RJ-45 MDI-X ports using standard UTP category 3,
4, or 5 cabling or STP cabling.
Note
When using STP cabling, the patch cables at the switch port and at
the workstation port should have an impedance-matching balun.
− Have either two UFC slots (2-slot modules) or four UFC slots (3-slot
modules), which can contain any combination of the following UFCs:
- 4-port Ethernet 10Base-T UFC:
This UFC adds an additional four switched Ethernet ports to the
module:
•
Interface: RJ45
•
Cabling: STP; UTP categories 3, 4, and 5
- 3-port Ethernet 10Base-FL UFC:
This UFC enables switching between Ethernet segments that are
physically distant (up to 2 kilometers away) from the module:
•
Interface: ST
•
Cabling: Multimode fiber
- 1-port Ethernet 100BaseT UFC:
This UFC provides one 100BaseT Ethernet port for a connection to a
100BaseT backbone segment or directly to a LAN station or server
equipped with a 100BaseT Ethernet adapter:
•
Interface: RJ45
•
Cabling: STP; UTP categories 3, 4, and 5
- 1-port Ethernet 100BaseFx UFC:
74 ATM Workgroup Solutions: Implementing the 8285 ATM Switch