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Black Box Console Server user guide 229
How BOOTP works
On bootup or power-up, the unit will send a broadcast request to the BOOTP server(s)
on the network. The request contains the ethernet address of the unit; it asks for network
configuration details (internet address, subnet mask, etc.). This process is shown on
page 229.You can stop the BOOTP server from replying to the unit; see page 236.
BOOTP
request and
response
The BOOTP server checks the ethernet address and looks for a matching address in its
bootptab file:
If a matching ethernet address is found the BOOTP server will reply to the unit; the
reply will contain network configuration information. This information is listed in
the bootptab file for that particular unit (identified by its hardware address). The unit
then boots using the information sent to it. If no matching ethernet address is found
the BOOTP server does not reply; the unit boots from internal memory.
The BOOTP response contains network configuration information; e.g. ip address,
subnet mask, broadcast address. It may also contain details of a bootfile (not
mandatory).
A bootfile (if you specify one) contains a unit’s specific boot information; e.g.
authentication method of users, access permission for the GUI. It may also contain
details of other files (not mandatory); e.g. software version, language files and a
general configuration file.
- User Guide 1
- INSTRUCCIONES DE SEGURIDAD 2
- About this Guide 5
- Fast Contents 6
- Contents 7
- Chapter 1 Introduction 17
- About the Console Server 18
- Typical applications summary 20
- Chapter 2 Installation 23
- of unit 27
- LED guide 29
- Console Server 30
- Setting up an IP address 33
- About DHCP 35
- • Set up procedure on page 39 38
- Set up procedure 39
- Setting up the host table 46
- Changing a Host 48
- Deleting a host 49
- Changing the Admin Password 50
- RADIUS configuration 51
- RADIUS parameters description 54
- DNS configuration 56
- WINS configuration 57
- Configuring network gateways 58
- Adding a gateway 59
- Deleting a Gateway 60
- Saving configuration changes 62
- Saving to a file 63
- Setting date and time 64
- Performing a soft reboot 65
- Security 70
- Lost password 73
- Configuring a dial in line 74
- Setting up the line 75
- Configuring SLIP 78
- Configuring PPP 81
- PPP form field descriptions 82
- ROAMING 90
- Configuring a modem 92
- Configuring users 93
- Adding a user account 98
- Configuring a user account 99
- User form field descriptions 100
- CALLBACK 104
- About user levels 107
- CLI prompts 107
- Changing a user’s password 108
- Deleting a user account 108
- Resetting the line to default 110
- Saving your settings 111
- Chapter 4 Using your Console 115
- Introduction 116
- Information required 117
- Access procedure 117
- Accessing devices via SSH 118
- Required Information 120
- Appendix A Cabling 125
- RJ45 RS232 serial ports 126
- AUI port 128
- RJ45 10/100BaseT port 129
- Admin Port 130
- Direct (1:1) Connections 131
- Sun Microsystem servers 132
- Black Box 833AS 134
- IBM RS6000 135
- PC serial port 136
- RXD 2 <——————— 3 TXD 137
- GND 7 ———————— 5 GND 137
- Terminals 138
- Direct connections 140
- Appendix B The CLI 141
- CLI commands 142
- Equivalent: 157
- (not available) 157
- See Also: netload, save 157
- See also 165
- [raw/telnet/ssh][raw/telnet] 166
- See also show ppp line 171
- ~break', where 179
- See also set line, show user 190
- See also 195
- Appendix C SNMP 203
- Overview 204
- Configuring SNMP support 205
- ADDRESS TYPE PERMISSIONS 208
- Private MIB definitions 209
- Network management 213
- Editing the 214
- Routing 214
- Appendix D Upgrading your 215
- Using TFTP from a host 217
- TFTP configuration 218
- Writing to FLASH memory 219
- Using BOOTP from a boothost 220
- Disable BOOTP/DHCP 221
- Appendix E Summary of Line 223
- Service Types 223
- List of line service types 224
- Appendix F BOOTP 227
- How BOOTP works 229
- How to setup BOOTP 231
- The bootfile 234
- Disabling the BOOTP reply 236
- Booting multiple units 238
- Multiple BOOTP servers 240
- Example of BOOTP 240
- Appendix G JETset 243
- Introduction to JETset 244
- Using JETset 246
- JETset program summary 249
- Appendix H Troubleshooting 251
- General communication matters 252
- Host problems 253
- JETset problems 254
- Login problems 255
- Problems with terminals 257
- Emergency recovery 258
- Problems with framed Routing 258
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