Accton Technology ES2027, E0298-R03, 150185-101 CheetahSwitch Workgroup-2027 Verifying Port Status

CheetahSwitch Workgroup-2027

Verifying Port Status

Check each connection by viewing the port status indicators shown in the following figure and table.

LED	State	Indication
Power	On	Switch is receiving power.
Diagnostic	On	Switch is running diagnostic program.
Console	On	Monitor or other device is connected to the console port.
COL	Flashing	Two or more devices attempted to transmit data at the
		same time. (Normal situation under Ethernet CSMA/CD.)
FDX	On	Communications have been set to full-duplex mode.
Link/Act	On	Port has established a valid network connection.
	Flashing	Traffic is traversing the port.
1001	On	Communications have been set to 100 Mbps.

1 - This indicator only appears on the 100BASE-TX uplink module.

Verifying System Operation

Verify that all attached devices have a valid connection. The switch monitors the link status for each port. If any device is properly connected to the switch and transmitting a link beat signal, the Link indicator will light up for the corresponding port. If the Link indicator fails to light when you connect a device to the switch, check the following items:

•Both sides of each connection must use the same transmission mode (i.e., half or full duplex). If a device is connected to the 10BASE-T or 100BASE-FX ports, then you must manually set the transmission mode using the on-board configuration program. (See "Configuring the Switch" on page 7.) If any device connected to the 100BASE-TX ports does not support auto-negotiation and cannot operate at half duplex (i.e., the system default when auto-negotiation fails), then you must also manually set the transmission mode using the configure button or on-board configuration program.

•Be sure all network cables and connectors are properly attached to the connected device and the switch.

•See if your cable is functioning properly by using it for another port and attached device that displays valid indications when connected to the network.

•Verify that you have not exceeded the specified limits for any attached media type as summarized in the following table:

Media Type	Max Length	Max Nodes	Other
Twisted Pair	100 meters (328 feet)	1000
Thin Ethernet	185 meters (607 feet)	30	0.5 meters1
Thick Ethernet	500 meters (0.3 miles)	500	50 meters2
Fiber Optic (10 Mbps)	2000 meters (1.24 miles)	link pair
Fiber Optic (100 Mbps)	half duplex: 412 m (0.25 miles)	link pair
	full duplex: 2000 m (1.24 miles)

1 - Minimum distance between nodes.

2 - Maximum length of drop cable from AUI port to transceiver. (0.5 meters = 1.64 feet; 50 meters = 164 feet)

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Quick Installation Guide

Configuring the Switch

The transmission mode for all ports must be set to the same mode used by the connected device. Ports 1 - 25 and the 100BASE-FX Uplink Module must be manually configured; but the system can use auto-negotiation to determine the transmission mode for the 100BASE-TX Uplink Module. However, if any device connected to this module does not support auto-negotiation, and a link cannot be established using half duplex (i.e., the last state tested by auto-negotiation), then you must manually set the transmission mode for the concerned port to half or full duplex using the configure button or console configuration program.

Notes: 1. Full duplex can only be used for a dedicated link. When connecting to a shared collision domain (e.g., a repeater hub) be sure the transmission mode is set for half duplex.

2. This switch uses the NWays standard for auto-negotiation.

If you connect a terminal or PC to the console port on the back of the switch, then you can perform the following tasks:

•Enable/disable any port

•Set the communication mode for any port

•Set the switching mode to cut-through or store-and-forward

• Restart the system

Displaying Port Utilization History

The switch can display a history of LAN bandwidth utilization for any port (selected with the configure button). A graph showing the percentage of valid data (compared to available bandwidth) that has passed through the selected port over the past 20 seconds is shown on the LED array located to the right of the displayed port number. Just use a short press (1 second) on the configure button to scan through the port numbers and display the current port’s utilization.

Using the Configure Button

The switch can set the transmission mode for any port (selected with the configure button). Use a short press (1second) to scan through the port numbers. When the required port number is displayed, use a long press (3 seconds) to display the current communication mode on the LED matrix to the right of the port number. To change modes, use a short press to scan through the available options. Ports 1 - 25 support half and full duplex; while Ports 26 - 27 support 10 or 100 Mbps, as well as half or full duplex and auto-negotiation (if the attached also supports this feature). When the required mode is displayed on the front panel, use another long press to enable your selection.

Notes: 1. The configuration options for the 10 Mbps ports includes half duplex, full duplex or auto-negotiation.

2.Options for the optional 100 Mbps uplink ports cover both speed and mode, as well as full auto-negotiation.

Using the Console Program

Establishing a Connection - Attach a VT100 compatible terminal or a PC running a terminal emulation program to the DB9 serial port on the back of the switch. Use the RS232 null-modem cable provided with this package, or use a null modem connection that complies with the wiring assignments shown on page 11. When attaching to a PC, set terminal emulation type to VT100, specify the port used by your PC (i.e., COM 1~4), and then set communications to 8 data bits, 1 stop bit, no parity, and 9600 bps. Also be sure to set flow control to "none."

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