GarrettCom Magnum 6K32 Hardware Installation And User's Manual page 42

Magnum 6K32 Managed Switch
The Managed Magnum 6K32 Fast Ethernet copper ports can be set for either
fixed 100Mb speed or N-way auto-negotiation per the IEEE802.3u standard. The
selection is made via 6K-MNS software. The factory default setting is for auto-
negotiation. At 100Mb-fixed speed, the user may select half- or full-duplex mode by
6K-MNS Software for each RJ-45 port separately. For detail information see Section 8
(Optimizing Port usage) of Magnum 6K32 Software user guide (MNS-6K) . See Section
(2.2.9 at page no.14) of this manual to access the "MNS-6K Software user-guide"
One frequently-used application for the Managed 6K32 Switch copper ports is
to connect one of them using a fiber media converter to another Switch in the network
backbone, or to some other remote 100Mb device. In this case, it is desirable to operate
the fiber link at 100Mb speed, and at either half- or full duplex mode depending on the
capabilities of the remote device. Standard commercially available Fast Ethernet media
converters mostly do not support auto-negotiation properly, and require that the switched
port to which they are connected be at 100Mb fixed speed. Attachment to 10/100 auto-
negotiation ports typically will not work properly. The 6K32 Switch's RJ-45 ports
handle this situation by configuring the ports as per desire through MNS software port
settings and can check the port status of each port after the change.
When Magnum 6K32 RJ-45 copper ports are set for auto-negotiation and are
connected to another auto-negotiating device, there are 4 different speed and F/H modes
possible depending on what the other device supports. These are: (1) 100Mb full-duplex,
(2) 100Mb half-duplex, (3) 10 Mb full-duplex and (4) 10 Mb half-duplex.
General information -
Auto-negotiation per-port for 802.3u-compliant switches occurs when:
-- the devices at both ends of the cable are capable of operation at either 10
Mb or 100Mb speed and/or in full- or half-duplex mode, and can
send/receive auto-negotiation pulses, and . . .
-- the second of the two connected devices is powered up*, i.e., when
LINK is established for a port, or
-- the LINK is re-established on a port after being lost temporarily.
•
NOTE – Some NIC cards only auto-negotiate when the computer system
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Installation and User Guide (02/05)
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