Lucent Technologies PortMaster Manual Do Utilizador

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How the PortMaster Works
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This chapter summarizes PortMaster operation and capabilities so you can choose how 
to configure your system. Consult the glossary for definitions of unfamiliar terms.
This chapter discusses the following topics:
See the PortMaster Command Line Reference for more detailed command descriptions and 
instructions.
Booting the PortMaster
When you start up the PortMaster, it carries out the following functions during the 
booting process:
1.
Self-diagnostics are performed. The results are displayed to asynchronous console 
port C0 or S0 if the console DIP switch (first from the left, also known as DIP 1) is 
up. 
2.
ComOS is loaded.
If the netboot DIP switch (second from the left, also known as DIP 2) is down, 
the PortMaster boots from the ComOS stored in nonvolatile Flash RAM. The 
PortMaster uncompresses and loads the ComOS into dynamic RAM (DRAM). If 
a valid ComOS is not found in Flash, the PortMaster attempts to boot from the 
network as described in the next paragraph.
If the netboot DIP switch is up, or if a valid ComOS is not found in Flash, the 
PortMaster sends a Reserve Address Resolution Protocol (RARP) message to the 
Ether0 Ethernet interface to find its IP address. If it gets a reply, the PortMaster