3Com SuperStack 3 4950 Getting Started Manual

Also see for SuperStack 3 4950: Datasheet Getting started guide Datasheet

Contents

3Com SuperStack 3 4950 Getting Started Manual Manual pdf 14 page image

14 CHAPTER 1: I NTRODUCING THE SUPERS TACK 3 S WITCH 495010/100/1000BASE-TPortsThe 12 10/100/1000BASE-T ports have RJ-45 connectors and areconfigured as Auto MDIX (cross-over).The default state for these ports is auto-negotiation enabled, where thespeed, duplex and flow control modes of a link are automaticallydetected to provide the highest available bandwidth with the link partner.Alternatively, auto-negotiation can be disabled. These ports can bemanually configured to 10 Mbps or 100 Mbps half duplex and 10 Mbpsor 100 Mbps full duplex. It is not possible to manually configure a1000BASE-T link as auto-negotiation is mandatory in the 1000BASE-Tstandard.1000BASE-SX Ports The 6 auto-negotiating 1000BASE-SX ports have MT-RJ connectors.The default state for these ports is auto-negotiation enabled, where thespeed, duplex and flow control modes are negotiated. As the speed andduplex 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.GBIC Ports The 6 GBIC ports support fiber Gigabit Ethernet short-wave (SX),long-wave (LX) and long-haul (LH70) GBIC transceivers in anycombination. This offers you the flexibility of using GBIC transceivers toprovide connectivity between the Switch and remote 1000 Mbpsworkgroups or to create a high capacity aggregated link backboneconnection.The default state for these ports is auto-negotiation enabled, where thespeed, duplex and flow control modes are negotiated. As the speed andduplex 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.