Cabletron Systems CSX100 series User Manual - Software Upgrades

Router Feature Descriptions  99

The following MIBs are supported:

· 

MIB II

· 

Bridge MIB

· 

Ethernet MIB

· 

IP Forwarding MIB

· 

PPP MIB For LCP

· 

Enterprise MIB for configuration

Dynamic Host Configuration Protocol (DHCP)

DHCP is used to acquire IP addresses and options (such as the subnet mask,

DNS, gateway, etc.) automatically. On the practical level, acquiring these

initialization parameters with DHCP translates into avoiding the more

involved router/PC process (reconfiguration of router and/or PC addresses to

be in the same network).

Network Address Translation (NAT)

NAT is an IP address conversion feature that translates a PC’s local (internal)

address into a temporary global (outside/Internet) IP address.

NAT is needed when a PC (or several PCs) on a Local Area Network wants to

connect to the outside Internet to get to a remote network: NAT swaps the

local IP address to a global IP address. Our version of NAT goes one step

further by allowing several PCs to share one single IP address to the Internet,

thus reducing connection costs. In effect, it allows a whole LAN to connect to

the Internet as a Single User.

Software Upgrades

Software upgrades can be performed remotely using the TFTP protocol for the

software download process.  The router’s file system is a DOS-compatible file

system and any file contained within the system may be retrieved or replaced

using the TFTP protocol.  Specifically, configuration files and operating