DHCP S
NOOPING
C
OMMANDS
22-13
binding table when it receives an ACK message from a DHCP server.
Also, when the switch sends out DHCP client packets for itself, no
filtering takes place. However, when the switch receives any messages
from a DHCP server, any packets received from untrusted ports are
dropped.
Example
This example enables DHCP snooping globally for the switch.
Related Commands
ip dhcp snooping vlan (22-13)
ip dhcp snooping trust (22-17)
ip dhcp snooping binding (22-14)
ip dhcp snooping vlan
This command enables DHCP snooping on the specified VLAN. Use the
no
form to restore the default setting.
Syntax
[
no
]
ip dhcp snooping vlan
vlan-id
vlan-id
- ID of a configured VLAN (Range: 1-4093)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• When DHCP snooping enabled globally using the
ip dhcp snooping
command (page 22-11), and enabled on a VLAN with this command,
DHCP packet filtering will be performed on any untrusted ports
within the VLAN as specified by the
ip dhcp snooping trust
command (page 22-17).
Console(config)#ip dhcp snooping
Console(config)#
Содержание 7824M/FSW - annexe 1
Страница 2: ......
Страница 24: ...TABLE OF CONTENTS xxiv ...
Страница 28: ...TABLES xxviii ...
Страница 32: ...FIGURES xxxii Figure 16 3 DNS Cache 16 7 ...
Страница 34: ...GETTING STARTED ...
Страница 46: ...SYSTEM DEFAULTS 1 12 ...
Страница 62: ...SWITCH MANAGEMENT ...
Страница 74: ...CONFIGURING THE SWITCH 3 12 ...
Страница 112: ...BASIC MANAGEMENT TASKS 4 38 ...
Страница 168: ...USER AUTHENTICATION 6 30 ...
Страница 223: ...SHOWING PORT STATISTICS 9 33 Figure 9 12 Port Statistics ...
Страница 230: ...ADDRESS TABLE SETTINGS 10 6 ...
Страница 304: ...CLASS OF SERVICE 13 16 ...
Страница 316: ...QUALITY OF SERVICE 14 12 ...
Страница 338: ...MULTICAST FILTERING 15 22 ...
Страница 346: ...DOMAIN NAME SERVICE 16 8 ...
Страница 348: ...COMMAND LINE INTERFACE IP Interface Commands 35 1 ...
Страница 362: ...OVERVIEW OF COMMAND LINE INTERFACE 17 14 ...
Страница 426: ...SYSTEM MANAGEMENT COMMANDS 19 56 Example Console show calendar 15 12 34 February 1 2002 Console ...
Страница 494: ...USER AUTHENTICATION COMMANDS 21 48 ...
Страница 514: ...CLIENT SECURITY COMMANDS 22 20 ...
Страница 540: ...ACCESS CONTROL LIST COMMANDS 23 26 ...
Страница 558: ...INTERFACE COMMANDS 24 18 ...
Страница 576: ...MIRROR PORT COMMANDS 26 4 ...
Страница 582: ...RATE LIMIT COMMANDS 27 6 ...
Страница 616: ...SPANNING TREE COMMANDS 29 28 ...
Страница 644: ...VLAN COMMANDS 30 28 ...
Страница 664: ...CLASS OF SERVICE COMMANDS 31 20 ...
Страница 678: ...QUALITY OF SERVICE COMMANDS 32 14 ...
Страница 720: ...APPENDICES ...
Страница 726: ...SOFTWARE SPECIFICATIONS A 6 ...
Страница 730: ...TROUBLESHOOTING B 4 ...
Страница 746: ...INDEX Index 6 ...
Страница 747: ......