METRObility Optical Systems R104-11 manual LED Indicators, Full-Duplex Flow Control Fdfl

UserThis section contains informationGuideregarding the operating features of the Metrobility R104.

LED Indicators

The R104 provides several LEDs for the visible verification of unit status and proper functionality. These LEDs can assist in troubleshooting and with overall network diagnosis and management. There are separate link/speed and activity/ duplex indicators for each port.

After power is applied to the card, verify correct connectivity via the LK LEDs.

LED	LED		Indication
Label	Name	Color (Status)
PWR	power	green (steady)	The unit is ON.
		green (steady)	The port has a valid link and is running at
			100Mbps.
	link/
LK			The port has a valid link and is running at
	speed	amber (steady)
			10Mbps.
		OFF	No link detected.
		green (blinking)	The port is sending or receiving data in full
			duplex mode.
	activity/
AT			The port is sending or receiving data in half
	duplex	amber (blinking)
			duplex mode.
		OFF	The port has no data activity.

Full-Duplex Flow Control (FDFL)

Full-duplex flow control is provided as a means of avoiding packet loss during times of network congestion. With FDFL enabled (default), the R104 issues a PAUSE frame when there is no buffer space available for incoming packets. FDFL is configurable through management software* only.

When FDFL is enabled, it is set on all four ports. However, FDFL is applicable only to a port when the following conditions are met:

•The chassis stacking line card is in full-duplex mode.

•Auto-negotiation is enabled on the port.

•During auto-negotiation, the port’s link partner indicated that it supports PAUSE frames.

*Refer to the Command Line Interface Reference Guide, NetBeacon Element Management Software Installation & User’s Guide or WebBeacon Management Software Installation & User’s Guide for software management information.

Metrobility 4-port Switch 11