Chapter 1: Introduction1-62E48-27R/2E49-27R User’s Guide1.3.6 Switching OptionsThe 2E4X-27R provides IEEE 802.1D switching, IEEE 802.1Qswitching, or SecureFast Switching Virtual Network Services between allof the front panel interfaces including Fast Ethernet Interface Modulesand High Speed Interface Modules (HSIMs).802.1Q switching and SecureFast switching allow for future migration toVirtual Network technologies without requiring the replacement ofexisting equipment.1.3.7 Standards CompatibilityThe 2E4X-27R is fully compliant with the IEEE 802.3 standard. Theoptional Fast Ethernet Interface Modules are fully compliant with theIEEE 802.3u standard.The 2E4X-27R provides IEEE 802.1D SpanningTree Algorithm (STA) support to enhance the overall reliability of thenetwork and protect against “loop” conditions. The 2E4X-27R supports awide variety of industry standard MIBs including RFC 1213 (MIB II),RFC 1757 (RMON), RFC 1493 (Bridge MIB) and RFC 1354 (FIB MIB).A full suite of Cabletron Systems Enterprise MIBs provide a wide arrayof statistical information to enhance troubleshooting.1.3.8 Year 2000 CompliantThe 2E4X-27R has an internal clock that can maintain the current timeand date beyond the year 1999.1.3.9 LANVIEW Diagnostic LEDsLANVIEW diagnostic LEDs serve as an important troubleshooting aid byproviding an easy way to observe the status of individual ports and overallnetwork operations. Chapter 4 provides details about the 2E4X-27RLANVIEW LEDs.
