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Magnum 6K32T & 6K32TRC Managed Switch Installation and User Guide 05/07)
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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 6K32T & 6K32TRC
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 6K32T & 6K32TRC 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
that they are in is powered up. These are exceptions to the “negotiate at
LINK – enabled” rule above, but may be occasionally encountered.
The auto-negotiation logic will attempt to operate in descending order and will normally
arrive at the highest order mode that both devices can support at that time. (Since auto-
negotiation is potentially an externally controlled process, the original “highest order
mode” result can change at any time depending on network changes that may occur). If
the device at the other end is not an auto-negotiating device, the 6K32T & 6K32TRC’s