2E4X-27 Overview2E42-27/2E42-27R/2E43-27/2E43-27R User’s Guide1-71.4.6 Switching OptionsThe 2E4X-27 provides 802.1D Switching, 802.1Q switching orSecureFast Switching Virtual Network Services between all of the frontpanel interfaces including any installed Fast Ethernet Interface Modulesand HSIM.802.1Q switching and SecureFast switching allow for future migration toVirtual Network technologies without requiring the replacement ofexisting equipment.1.4.7 Standards CompatibilityThe 2E4X-27 provides IEEE 802.1D Spanning Tree Algorithm (STA)support to enhance the overall reliability of the network and protectagainst “loop” conditions. The 2E4X-27 supports a wide variety ofindustry standard MIBs including RFC 1213 (MIB II), RFC 1757(RMON), RFC 1371 (RS232 MIB), RFC 1493 (Bridge MIB) andRFC 1354 (FIB MIB). A full suite of Cabletron Systems Enterprise MIBsprovide a wide array of statistical information to enhance troubleshooting.1.4.8 Year 2000 CompliantThe 2E4X-27 has an internal clock that can maintain the current time anddate beyond the year 1999.1.4.9 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-27LANVIEW LEDs.
