Overview
The HSIM-W87 has its own i960 HD microprocessor used to process data packets, provide simple configuration, Inverse Multiplexer functionality, and statistics processing. The SmartSwitch host platform provides the required logical IP Host services. The HSIM-W87 is designed to be installed in any Cabletron Systems product that supports the High Speed Interface Module.
The HSIM-W87 operates in two modes:
•Switching
•IMUX
The first mode, switching, is the default mode. The HSIM-W87 forwards data packets received by the host platform out through the logical DS1 interfaces. It also forwards packets received in the DS1 interfaces to or through the host. The default and only layer 2 WAN protocol used with the HSIM-W87 is raw HDLC.
The host platform may operate in 802.1D bridging, 802.1Q VLAN, or SecureFast mode.
The second mode of operation is using Cabletron Systems Inverse Multiplexer (IMUX) functionality to aggregate multiple DS1 connections into single higher bandwidth WAN connections. In order to operate in this mode, the user will simply need to configure the appropriate IMUX groups containing the DS1 connections.
Along with the built-in management features (Network Tools) described in Chapter 4, the HSIM-W87 can be managed using SNMP, and statistical data can be accessed via SNMP by referencing the interface group defined in RFC-1213.
