IBM BladeCenter JS20 Maintenance And Troubleshooting Manual - Chapter

Chapter

6.

Running

a

Serial

Over

LAN

session

The

IBM

Eserver

BladeCenter

management-module

command-line

interface

provides

a

convenient

method

for

entering

commands

that

manage

and

monitor

BladeCenter

components.

The

blade

server

does

not

support

a

direct

connection

to

a

monitor,

keyboard,

or

mouse.

Therefore,

to

enable

communication

between

the

blade

server

and

these

devices,

you

must

first

configure

the

SOL

feature

on

the

blade

server

to

establish

an

SOL

connection

and

then

start

an

SOL

session

as

described

in

this

chapter.

Note:

Detailed

information

about

configuring

the

SOL

feature

is

described

in

the

BladeCenter

JS20

Installation

and

User’s

Guide

on

the

IBM

BladeCenter

Documentation

CD.

This

chapter

contains

the

following

information

about

running

an

SOL

session:

v

Starting

the

command-line

interface

v

Establishing

a

Telnet

connection

v

Establishing

a

Secure

Shell

(SSH)

connection

v

Starting

an

SOL

session

v

Ending

an

SOL

session

In

the

BladeCenter

environment,

the

integrated

system

management

processor

(ISMP)

and

network

interface

controller

(NIC)

on

each

blade

server

route

the

serial

data

from

the

blade

server

serial

communications

port

to

the

network

infrastructure

of

the

BladeCenter

unit,

including

an

Ethernet

compatible

I/O

module

that

supports

SOL

communication.

Configuration

of

BladeCenter

components

for

SOL

operation

is

done

through

the

BladeCenter

management

module

(see

the

BladeCenter

JS20

Installation

and

User’s

Guide

on

the

IBM

BladeCenter

Documentation

CD).

The

management

module

also

acts

as

a

proxy

in

the

network

infrastructure

to

couple

a

client

running

a

Telnet

session

with

the

management

module

to

an

SOL

session

running

on

a

blade

server,

allowing

the

Telnet

client

to

interact

with

the

serial

port

of

the

blade

server

over

the

network.

Because

all

SOL

traffic

is

controlled

by

and

routed

through

the

management

module,

it

is

possible

for

administrators

to

segregate

the

management

traffic

for

the

BladeCenter

unit

from

the

data

traffic

of

the

blade

servers.

To

start

an

SOL

connection

with

a

blade

server,

you

must

first

start

a

Telnet

command-line

interface

session

with

the

management

module.

When

this

Telnet

command-line

interface

session

is

running,

you

can

start

a

remote

console

SOL

session

with

any

blade

server

installed

in

the

BladeCenter

unit

that

is

set

up

and

enabled

for

SOL

operation.

You

can

establish

as

many

as

20

separate

Telnet

sessions

with

the

BladeCenter

management

module,

giving

you

the

ability

to

have

14

simultaneous

SOL

sessions

active

(one

for

each

of

up

to

14

blade

servers)

with

six

additional

command-line

interface

sessions

available

for

BladeCenter

unit

management.

If

security

is

a

concern,

secure

shell

(SSH)

sessions

can

be

used

to

establish

secure

Telnet

command-line

interface

sessions

with

the

BladeCenter

management

module

before

starting

an

SOL

console

redirect

session

with

a

blade

server.

The

most

recent

versions

of

all

BladeCenter

documentation

are

available

from

the

IBM

Web

site.

Complete

the

following

steps

to

check

for

updated

BladeCenter

documentation

and

technical

updates:

1.

Go

to

http://www.ibm.com/support/.

©

Copyright

IBM

Corp.

2003

33