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4.9 LAN Switching Modules
Attention
The following section is included as a preview of module support that might
become available in 1997.
The 8285 is capable of supporting the following LAN switching modules:
•
Token-Ring:
− 2-slot 8272 ATM/LAN Switch Module
− 3-slot 8272 ATM/LAN Switch Module
− 2-slot 8272 LAN Switch Module with the following:
- 8272 LAN Switch ATM Backplane Upgrade
1
− 3-slot 8272 LAN Switch Module with the following:
- 8272 LAN Switch ATM Backplane Upgrade
2
•
Ethernet:
− 2-slot 8271 ATM/LAN Switch Module
− 3-slot 8271 ATM/LAN Switch Module
− 2-slot 8271 LAN Switch Module with the following:
- 8271 LAN Switch ATM Backplane Upgrade
3
− 3-slot 8271 LAN Switch Module with the following:
- 8271 LAN Switch ATM Backplane Upgrade
4
Notes:
1Becomes functionally identical to 2-slot 8272 ATM/LAN Switch Module.
2Becomes functionally identical to 3-slot 8272 ATM/LAN Switch Module.
3Becomes functionally identical to 2-slot 8271 ATM/LAN Switch Module.
4Becomes functionally identical to 3-slot 8271 ATM/LAN Switch Module.
4.9.1 Description
The LAN switch modules that could be supported by the 8285 provide existing
LAN users high-performance, cost-effective access to the ATM backbone as well
as media-speed LAN switching for microsegmentation.
Direct ATM backplane connectivity allows segments of LAN users to be
interconnected to other LANs users segment via LAN switching or high-speed
ATM switching.
These modules feature the following:
•
Common Features:
− Support media-speed transmission on all ports simultaneously, even in
full-duplex mode
− Support half- or full-duplex transmission on each port independently
Chapter 4. IBM 8285 ATM Modules 71