3com 3C13880 Manual De Usuario

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3Com Router 6000 Family 
Installation Manual 
Chapter 1 
Preparing for Installation
 
3Com Corporation 
1-2 
Chapter 1  Router Overview 
1.1  Introduction 
3Com 6000 Routers are next generation high-performance edge routers that 3Com 
Corporation solely developed. They provide high forwarding performance and a broad service 
range. The Router 6000 supports flexible interface cards (FICs), hot swappable fan modules 
and power supply units (PSUs) in 1+1 redundancy. Along with the NE Series Routers, the 
Router 6000 provides complete network solutions for service providers and enterprises. 
The following are the major features of the Router 6000. 
I. Abundant FIC options 
Abundant FICs are available with the Router 6000 allowing great flexibility and investment 
protection.  
II. Ethernet access 
The electrical and fiber (multi-mode and single-mode) FE FICs available with the Router 
6000 support PPPoE and PPPoEoA that can offer authentication, authorization, and 
accounting (AAA) services for Ethernet access, hence satisfying the requirements of 
government offices and enterprises in broadband access. 
III. ATM and DSL 
Digital subscriber line (DSL) is a simple but highly efficient broadband technology that 
achieves great data transmission capacity over existing copper wiring by using the digital 
code modulation technology. Installed with an ADSL or G.HSDSL card, the Router 6000 
can connect the medium-to-small-sized enterprises to the digital subscriber line access 
multiplexer (DSLAM) equipment through a public switched telephone network (PSTN) and 
then to the Internet. 
Asynchronous transfer mode (ATM) transmits, multiplexes, and switches information in 
cells. The Router 6000 can be installed with these ATM cards: 25 Mbps, 155 Mbps, E3, 
and T3. The cards support ATM adaption layer type 5 (AAL5) and offer traffic services such 
as constant bit rate (CBR), variable bit rate (VBR) and unspecified bit rate (UBR). They are 
well-suited to transfer large packets and provide high-speed data services. A 
medium-and-small-sized enterprise can use them to connect its network to an ATM 
network. 
IV. MPLS 
Multiprotocol label switching (MPLS), a combination of IP and ATM technologies, replaces 
the IP header with a short and length-fixed label as traffic identifier, based on each routers