GarrettCom 500-Series Magnum 528’s internal jumpers for auto-negotiation on or OFF, Operation

Magnum 500-Series Switching Hubs					Installation and User Guide (08/98)
Figure 3.5. Be certain that the main power is off before opening the unit or
changing any internal settings.
	Switch	Port		Function	Default setting	Manual setting
	SW2	Both 100Mb		Auto-negotiation	100 Mb (Non-Auto)	AUTO
	SW7	Port	1	Uplink	Uplink =	Uplink X
	When Non-Auto:
	Jumper	Port		Function	Position 1 - 2	Position 2 - 3
	JP4	Port	1	10 / 100 config	100 Mb (default)	10 Mb
	JP3	Port	2	10 / 100 config	100 Mb (default)	10 Mb

SW7

X	SW7
		1
UPLINK		100 Mb PORT
=

JP4

100

JP4

1

	JP3
	10
10	JP3
1
	100

SW2

100 Mb PORTS NEGOTIATION

100 Mb SW2 AUTO

Figure 3.5 : Magnum 528’s internal jumpers for auto-negotiation ON or OFF

Note that auto-negotiation is an on-going process that can introduce changes in network operation at any time, whether intended or accidental. Getting an auto- negotiating network running properly once is not enough to make certain that it will continue to operate correctly indefinitely. Attached devices can and do change while the network is operating. In addition, there may be intermediate devices (such as media converters, which do not support auto-negotiation) in the cabling between the switched port and the rest of the network, requiring the switching port to be fixed in speed and mode in order to achieve and maintain the desired overall network operation.

Therefore, the default setting of fixed 100Mb speed with F/H manual selection (no auto-negotiation, copper ports) is generally desirable because it is a safe and a maximum-performance condition for the Model 528’s Fast Ethernet high speed ports.

See Section 4.4 for additional information on auto-negotiation functionality.

4.0OPERATION

This chapter describes the functions and operation of the Magnum 508, 528 and 528F Switching Hubs.

GARRETT

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