3Com 3CB9RG4, Quick Start Manual

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6 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Choosing a Slot for
Your Module
This section provides guidelines for choosing the best slot for your 4-port
Gigabit Ethernet Layer 3 Switching Module (GBIC).
Installation in a 7-slot Chassis
You can choose any slot in the 7-slot chassis to house a 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) — except slot 7, which is for
the wider switch fabric modules, and slots 8 and 9, which are for the
smaller management modules.
Table 1 and Table 2 show the relationship among the Gigabit Ethernet
(GEN) Switch Fabric Modules (24-port or 9-port) and the 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) when both are installed in a
7-slot chassis. To summarize the table:
■
The switching module can use all four of its backplane ports in slots
1 – 6, when used in conjunction with a 24-port GEN Switch Fabric
Module (3CB9FG24 or 3CB9FG24T). 3Com recommends that you
install this Layer 3 switching module in any of those slots.
■
The switching module can use only its first backplane port (module
port number 5) when used in conjunction with a 9-port GEN Switch
Fabric Module (3CB9FG9).
Table 1 and Table 2 also show the relationship between the GEN Switch
Fabric Module backplane port numbers and the corresponding LED
indicator numbers.