Справочник Пользователя для Enterasys Networks 2H252-25R

The 802.1 port priority is used to assign a default priority to the frames received without priority 
information in their tag header, map prioritized frames to the appropriate transmit queues, and 
prioritize frames according to protocol type. The 802.1 port priority is part of the IEEE 802.1D 
standard.

Management of the 2H252-25R is accomplished using SNMP compliant management tools for 
in-band Local Management. Out-of-band Local Management is provided through the RJ45 COM 
port on the front panel using a VT100 terminal or a VT100 terminal emulator. In-band remote 
management is possible through any SNMP compliant Network Management Software.

Local Management described in the SmartSwitch Series 2E253, 2H252, 2H253 and 2H258 Local 
Management User’s Guide provides the ability to manage the 2H252-25R, and optional HSIMs 
and VHSIMs that support Ethernet. For information about Local Management for optional 
non-Ethernet HSIMs or VHSIMs, refer to their respective user’s guide.

The 2H252-25R provides 802.1Q switching or SecureFast Switching Virtual Network Services 
between all of the front panel interfaces including the optional HSIM or VHSIM interface. In the 
802.1Q mode (the default mode of operation), the 2H252-25R functions as an 802.1D switch until 
VLANs are configured.

IEEE 802.1Q switching and SecureFast switching allow migration to Virtual Network 
technologies without requiring the replacement of existing equipment.

Optional HSIMs and VHSIMs are available from Enterasys Networks for additional connectivity 
to various networking technologies. The HSIMs and VHSIMs available for the 2H252-25R are 
listed in the Release Notes shipped with the device.