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Introduction 1-7
1.1.15 Optional HSIMs and VHSIMs
Optional HSIMs and VHSIMs are available from Cabletron Systems for additional connectivity to
various networking technologies. The HSIMs and VHSIMs available for the 2H253-25R are listed
in the Release Notes shipped with the device.
1.1.16 Standards Compatibility
The 2H253-25R is fully compliant with the IEEE 802.3, 802.3u, 802.3x, 802.1D, and 802.1Q
standards. The 2H253-25R provides IEEE 802.1D Spanning Tree Algorithm (STA) support to
enhance the overall reliability of the network and protect against “loop” conditions. The
2H253-25R supports a wide variety of industry standard MIBs including RFC 1213 (MIB II),
RFC 1757 (RMON), RFC 1493 (Bridge MIB), RFC 1354 (FIB MIB), and RFC 1190 (Path MTU
Discovery). A full suite of Cabletron Systems Enterprise MIBs provide a wide array of statistical
information to enhance troubleshooting. For information on how to extract and compile individual
MIBs, contact Cabletron Systems.
1.1.17 Year 2000 Compliant
The 2H253-25R has an internal clock that can maintain the current time and date beyond the year
1999.
1.1.18 LANVIEW Diagnostic LEDs
LANVIEW diagnostic LEDs serve as an important troubleshooting aid by providing an easy way
to observe the status of individual ports and overall network operations.