Cabletron Systems 2E48-27R 用户手册

 

Introduction

 

The 2E48-27R connects to Ethernet networks or workstations through 24 
ST fiber optic ports on the front panel. These ports support multimode 
fiber optic cables at lengths up to 2 kilometers. The ports are IEEE 802.3 
10BASE-F compliant.

The 2E49-27R connects to Ethernet networks or workstations through 24 
ST fiber optic ports on the front panel. These ports support single mode 
fiber optic cables at lengths up to 5 kilometers. The ports are FOIRL 
compliant.

All of the devices have two front panel slots (ports 25 and 26) for optional 
Fast Ethernet Interface Modules to support an uplink to 100 Mbps Fast 
Ethernet backbones or a high speed connection to a local server. There is 
also space for an optional HSIM to provide additional connectivity to 
various networking technologies.

 

Each switched Ethernet port supports full wire-speed Ethernet 
communications and can be configured to operate in Full Duplex 
Switched Ethernet (FDSE) mode. FDSE allows each port to provide a 
dedicated 20 Mbps bandwidth for file server or high-end workstation 
connections. The optional Fast Ethernet ports provide up to 200 Mbps of 
bandwidth.

 

SmartTrunk, also referred to as SmartTrunking, is Cabletron Systems’ 
terminology for load balancing or load sharing. SmartTrunk technology 
provides an easy-to-implement mechanism to group, or aggregate, 
multiple physical links together to scale the backbone bandwidth beyond 
the limitations of a single link. All links are user-configurable so 
administrators can scale the backbone bandwidth by adding SmartTrunk 
links. The SmartTrunk benefits are as follows:

 

All purchased bandwidth is used.

 

Distributed, resilient links increase reliability and performance.

 

Multiple technologies are supported within a single trunk for 
maximum flexibility.