Using a Switch/Media Module

The 10 and 100 Mbps repeater buses in the hub can be linked together by installing an optional switch/media module in the upper slot on the front panel. The switch/media module is used when traffic must be passed to a destination in the other segment, when broadcast traffic is sent, or when the destination is unknown. The switch/media module passes traffic between the source and destination segment at full duplex, using store-and-forward processing.

Multiple switch/media modules may be installed in a stack, but only one of the modules will actively bridge the 10/100 Mbps repeater buses. If the active switch/media module fails, it must be removed from the hub to activate the standby module.

Table 2-1. Optional Modules

Part Number

Functions

Description

ELH-ULSW-TX

10Base-T/

Single-port RJ-45 uplink module using MDI-X and

 

100Base-TX,

MDI connectors, with internal switching between

 

plus internal

the 10 and 100 Mbps repeater buses.

 

switching

 

ELH-ULSW-F2 100Base-FX- MM, plus inter- nal switching

ELH100-SNMP RMON/SNMP/ Web Manage- ment

2-port MultiMode (MM) fiber uplink module using SC fiber connectors, with internal switching be- tween the 10 and 100 Mbps repeater buses.

Agent Module used to manage the hub (or attached stack). Includes RS-232 serial port for console con- nection. One backup agent module can be in- stalled in the stack.

18 Installation

ELH100-12/24TX

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Cabletron Systems ELH100 manual Using a Switch/Media Module, Part Number Functions Description

ELH100 specifications

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