Ethernet Connection Switch (Sw4); Installing The Etwmim - Cabletron Systems ETWMIM User Manual

INSTALLING THE ETWMIM

3.2.2 Ethernet Connection Switch (SW4)

Ethernet can connect to the ETWMIM in one of two ways — through a
front panel EPIM connection or through the backplane. If you want a
front panel EPIM connection, slide switch SW4 toward the front of the
unit. If you want Ethernet connection through the backplane, slide
switch SW4 toward the rear of the module.
Note: When set for the front panel, this switch turns the front panel
EPIM LED ON, regardless of whether an EPIM is installed or not.
3.3 INSTALLING THE ETWMIM
Depending on what you want to do with the ETWMIM, you must
follow a few hub configuration rules. When installing the ETWMIM
into your hub, keep the following in mind:
• If the ETWMIM is going to use the backplane A-channel
(Ethernet Channel) in your MMAC hub, the hub MUST have
an Ethernet management device (e.g., IRM, IRM-2, etc.) in the
far right slot.
• If the ETWMIM is going to use the front panel EPIM for
Ethernet connectivity, you DO NOT need an Ethernet
management device in your hub.
• If the ETWMIM is going to bridge Token Ring traffic, and you
are using a non-shunting MMAC, all Token Ring modules
MUST reside in slots adjacent to the ETWMIM.
After unpacking your ETWMIM, setting any configuration switches,
and deciding where to insert the board in the hub proceed as follows:
Note: We recommend powering-down your MMAC before installing or
removing ETWMIMs, even though they have "hot swap" capabilities.
1. Turn off the power to the MMAC. Remember that MMACs with
multiple power supplies have an ON/OFF switch for each supply.
2. Remove the selected blank panel from the MMAC.
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