Accton Technology EH3008N CheetaHub Power-3008N/3016N Quick Installation Guide, Troubleshooting

CheetaHub Power-3008N/3016N

Quick Installation Guide

Cascading Hubs with the Daisy-Chain Port - You can easily connect to another hub or switch via the RJ-45 MDI daisy-chain port on the front panel. The figure below shows a sample configuration. When connecting to 10 Mbps Ethernet, the maximum number of hubs that can be cascaded is four (with up to 100 meters or

328 feet of cable allowed between each hub). However, when connecting to another Fast Ethernet hub, the number of hubs that can be cascaded is limited to two, and the total network span allowed is only 205 meters (672 feet).

Stack of Hubs - You can stack up to six hubs using the stack ports on the rear panel. A CheetaHub stack can include up to 96 RJ-45 ports. Also note that if more than one hub with internal switching (EH3008N-SW or EH3016N-SW) is placed in the stack, switching between stack segments will be managed by the uppermost unit in the stack, and internal switching will be disabled for all other units.

Connecting to a Network Backbone - You can easily connect to a collapsed backbone switch via the RJ-45 MDI daisy-chain port on the front panel. Because a switch breaks up the collision domain, it can be used to connect a group of CheetaHub stacks.

Input Power (full range)

Power Consumption

Heat Dissipation

Maximum Current (110/240V)

Dimensions

Weight

Temperature

Humidity

Certification

Emissions

Immunity

Safety

Internal Switching Criteria

Network Bridging Function

Switching Method

Address Table

Queue Buffer

Filtering/Forwarding Rate

100 to 240V (+6% ~ -10%), 50 to 60 Hz (±3Hz)

EH3008N	EH3016N
15 Watts max.	27 Watts max.
51 BTU/hr max.	92 BTU/hr max.
0.10 / 0.05 ARMS	0.23 / 0.11 ARMS
251x116x37 mm	273x166x43 mm
9.88x4.56x1.46 in	10.75x6.54x1.69 in
0.83Kg (1.83lb)	1.65Kg (3.64lb)

0~40°C (32~104°F) Standard Operating, -25~70°C (-13~158°F) Storage

5% to 95% (Non-condensing) CE Mark

EH3008N: FCC Class B, VCCI Class B, CISPR Class B

EH3016N: FCC Class A, VCCI Class A, CISPR Class A IEC 1000-4-2/3/4/6

CSA/NRTL, TÜV/GS

Filtering, forwarding and learning Store-and-forward

4K entries

9K bytes / 10M port, 87K bytes / 100M port Line speed

Product Specifications

Repeater Criteria
Access Method	CSMA/CD, 10 Mbps or 100 Mbps
Standards Conformance	IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX,
	IEEE 10BASE2 (EH3016N/SW)
Communication Rate	10/100 Mbps on RJ-45 ports, 10M on BNC port
Media Supported	10BASE-T- 100Ω Category 3,4,5 twisted-pair
	100BASE-TX- 100Ω Category 5 twisted-pair
	10BASE2 - thin Ehternet coaxial cable (EH3016N/SW)
Number of Ports	8 RJ-45 ports (EH3008N/SW)
	16 RJ-45 ports (EH3016N/SW)
	1 BNC port (EH3016N/SW)
	1 MDI daisy-chain port (replaces 1 station port)
	All models have 2 stack ports on the rear panel
Indicator Panel	LEDs for monitoring power, activity, collision, port link
	(10/100M), port partition, and utilization

Troubleshooting

Diagnosing Hub Indicators

The hub can be easily monitored through panel indicators to assist the network manager in identifying problems. This section describes common problems you may encounter and possible solutions.

Symptom: Link 10/100M indicator does not light up after making a connection.

Cause: Network interface (e.g., a network adapter card on the attached device), network cable, or hub port is defective.

Solution: Verify that the hub and attached device are powered on. Be sure the cable is plugged into both the hub and corresponding device. Verify that the proper cable type is used and its length does not exceed specified limits. Check the adapter on the attached device and cable connections for possible defects. Replace the defective adapter or cable if necessary.

Symptom: Power indicator does not light up (green) after power on.

Cause: Defective power outlet, power cord, or internal power supply.

Solution: Check the power outlet by plugging in another device that is functioning properly. Check the power cord with another device. If these measures fail to resolve the problem, have the unit's power supply replaced by a qualified Accton distributor.

Power and Cooling Problems

If the Power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply as explained in the previous section. However, if the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet, and verify that the fan on back of the unit is unobstructed and running prior to shutdown. If you still cannot isolate the problem, then the internal power supply may be defective. In this case, contact your Accton distributor for assistance.

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