3Com MSH 1005, User Manual

Page: 16 / 155

DUA1840-0AAA01
1 - 4 C
H A P T E R
1: G
E T T I N G
S
T A R T E D
Transceiver Module Ports
A slot on the front of the Switch 1005 allows you to install any of the
Transceiver M odules available for this product. You can find more
details in “Transceiver Module slot” on page 1-18.
The Backbone Port
The MSH Switch 1005 requires that the port connecting it to the rest of
your network is configured as a backbone port . This is the port to which
all frames arriving at a switch port with an unknown destination
address will be forwarded. Addresses received on the backbone port
are not stored in the switch database of the Switch 1005.
When you first install a Switch 1005 into your MSH chassis, it will
configure its backbone port to be the first Fast Ethernet port it finds
either on the Switch, or on the E xpansion M odule if fitted. You can
change your designated backbone port to be any switch port (internal
or external). Changing the default backbone port is described in
“Specifying the Backbone Port” in Chapter 3.
You can only have one backbone port per Switch 1005, unless you
have implemented multiple VLANs on one Switch; in this case you can
configure one backbone port per VLAN. You can find more information
about VLANs in Chapter 4 .
Adding an Expansion Module
The MSH Switch 1005 also has provision for installing an Expansion
Module. The Expansion Module has three slots for installing any
combination of the Transceiver Module s described in “Transceiver
Module slot” on page 1-18.