3Com 3812 - SuperStack 3 Switch Getting Started Manual

Also see for 3C17400: Getting started guide Implementation guide Implementation guide Datasheet

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3Com 3812 - SuperStack 3 Switch Getting Started Manual Manual pdf 15 page image

Switch — Front View Detail 15using SFP transceivers to provide connectivity between the Switch andremote 1000 Mbps workgroups or to create a high capacity aggregatedlink backbone connection.The SFP ports are capable of auto-negotiating flow control. As the speedand duplex modes are fixed by the media type, only the flow control isnegotiated with the link partner. Alternatively, auto-negotiation can bedisabled and the flow control setting can be manually configured.Console Port The console port allows you to connect a terminal and perform remote orlocal out-of-band management. The Switch 3812 and Switch 3824 havea DB-9 serial connector and need a serial cable to connect to your PC.The Switch 3848 has an RJ-45 serial port and is supplied with an RJ-45 toDB-9 cable.The standard null modem cable is set to autobaud (up to a maximum of19,200 baud), 8 data bits, no parity and 1 stop bit.LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read theirstatus according to color. For information on using the LEDs for problemsolving, see “Checking for Correct Operation of LEDs” on page 23.Table 4 LED behaviorLED Color IndicatesPort Status/Packet LEDsGreen A high speed (1000 Mbps) link is present, and the portis enabled.Green flashing A high speed (1000 Mbps) link is present and active.Yellow A low speed (10/100 Mbps) link is present, and theport is enabled.Yellow flashing A low speed (10/100 Mbps) link is present and active.Green for onesecond, Amberfor one second,then OFF untiloperational.POST in operation, all LEDs perform a one second lamptest.Alternate yellowthen greenflashing (fast)A port has failed a loop back test during POST.Alternate yellowthen greenflashingA link is present but the port has been disabled.dua1740-0aaa03.book Page 15 Thursday, December 23, 2004 9:23 PM