power off. (Use the AIXshutdowncommand-F .) Watch for the messageNO CARRIER on your remote terminal.

If Yes, this is the correct response. The modem is set up correctly.

If

No, try &Dnanothersetting for

your server's modem. See your

model

manual

for this information&Dn. Thecommand

appears in three places each

in

three of

the sample modem configuration files. Only the following sample modem

configuration files contain&Dn commandthe (in three places each):

 

 

Ÿ

modem_f.cfg

 

 

 

Ÿ

modem_f0.cfg

 

 

 

Ÿ

modem_f1.cfg

 

 

 

If you are using modem_z.cfg or modem_z0.cfg, you cannot control DTR response. If your remote terminal does not disconnect after logging off, you must command the remote terminal emulator to hang up. This then breaks the connection.

Recovery Strategy

The

recovery

strategy consists

of making

two

calls

to establish a remote session.

This

solution

 

is

the

easiest

to

implement

and

allows

more freedom

for

configuring

your

server's

serial

ports.

 

 

 

 

 

 

 

To set

up

a

remote

terminal

session, dial

into the

Service Processor

and start the

system. After

the operating system is loaded and initialized, the connection will be

dropped. At this point, call

the

server back

and the operating

system will answer and

offer

you

the

login

prompt.

 

 

 

 

 

 

 

Prevention Strategy

The disconnect is caused by the operating system when it initializes the Primary Console. The tests listed in “Transfer of a Modem Session” on page 183 are conducted with the remote terminal selected as the primary console to manifest the modem's response to DTR transitions.

ŸIf a local ASCII terminal or a graphics console is to be a permanent part of your

server,

then make

one of them the primary console. Your remote terminal will no

longer

experience

the

connection loss.

 

 

Ÿ If a

local

console

is

not

a permanent

part

of your server, you can still assign

either

the

unused

graphics

console or

the

unused serial port as the primary

console. This gives you the desired seamless connection at your remote terminal.

184 RS/6000 Enterprise Server Model H80 Series User's Guide

Page 200
Image 200
IBM H80 Series manual Recovery Strategy, Prevention Strategy