Smc-networks SMC TigerAccess SMC7824M/FSW Manual de usuario Pagina 507
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Valorado. / 5. Basado en revisión del cliente
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)#
- TigerAccess 1
- Management Guide 3
- Trademarks: 4
- NTRODUCTION 35
- ESCRIPTION 38
- System Defaults 42
- ONNECTING 48
- Basic Configuration 50
- Setting Passwords 51
- Manual Configuration 52
- Dynamic Configuration 53
- Trap Receivers 56
- Managing System Files 58
- Saving Configuration Settings 59
- AVIGATING 65
- Button Action 66
- Table 3-2 Switch Main Menu 67
- APABILITIES 85
- Using DHCP/BOOTP 88
- ESTORING 93
- 1. CLI only 97
- 2. CLI only 99
- ANAGEMENT 100
- Command Attributes 101
- Displaying Log Messages 105
- ONFIGURING 107
- Resetting the System 108
- OMMUNITY 117
- Command Usage 118
- UTHENTICATION 139
- Authentication 141
- Field Attributes 151
- Generate 153
- 802.1X P 157
- Displaying 802.1X Statistics 164
- ILTERING 167
- DDRESSES 167
- Console(config-if)# 172
- Specifying the Mask Type 183
- Configuring an IP ACL Mask 184
- Configuring a MAC ACL Mask 186
- Field Attributes (Web) 191
- Field Attributes (CLI) 192
- Basic information: 192
- Configuration: 192
- Current status: 193
- NTERFACE 195
- ONNECTIONS 195
- ONFIGURATION 196
- Configuring LACP Parameters 203
- Displaying LACP Port Counters 207
- Configuring Port Mirroring 215
- Configuring Rate Limits 216
- Command Attribute 217
- Showing Port Statistics 218
- TATISTICS 219
- Figure 9-12 Port Statistics 223
- Figure 10-1 Static Addresses 226
- LGORITHM 231
- Region R 233
- ISPLAYING 235
- VA: VLAN Aware 260
- VU: VLAN Unaware 260
- IEEE 802.1Q VLAN 261
- Command Attributes (Web) 265
- Command Attributes (CLI) 266
- IEEE 802.1Q T 275
- Configuring Private VLANs 283
- Priority 01234567 291
- Queue 20134567 291
- Figure 13-2 Traffic Classes 293
- Layer 3/4 Priority Settings 296
- Mapping IP Port Priority 302
- ARAMETERS 309
- ULTICAST 317
- Multicast VLAN Registration 328
- EGISTRATION 329
- Web – Select DNS, Cache 345
- Figure 16-3 DNS Cache 345
- Accessing the CLI 349
- Console Connection 349
- Entering Commands 351
- Showing Commands 353
- Understanding Command Modes 355
- Exec Commands 355
- Console#configure 357
- Console(config)# 357
- Privileged Exec mode 358
- Command Line Processing 359
- Command Groups 360
- Table 18-1 General Commands 363
- Console>enable 364
- Console# 364
- Console#disable 365
- Console> 365
- Console#!2 367
- Console#config 367
- Console#reload 367
- Console(config)#prompt RD2 368
- RD2(config)# 368
- Console(config-if)#end 368
- Console(config)#exit 369
- Console#exit 369
- Press ENTER to start session 369
- User Access Verification 369
- Username: 369
- Example 370
- Device Designation Commands 372
- System Status Commands 373
- System Mode Commands 380
- System MTU Commands 382
- Console(config)#jumbo frame 383
- File Management Commands 384
- Line Commands 393
- Console(config-line)# 397
- Event Logging Commands 406
- Table 19-10 Logging Levels 407
- Console#clear log 411
- SMTP Alert Commands 415
- Command Mode 419
- Normal Exec, Privileged Exec 419
- Time Commands 420
- Table 20-1 SNMP Commands 427
- Console(config)#snmp-server 428
- Privileged Exec 438
- 23. No view is defined 441
- 24. Maps to the defaultview 441
- User Account Commands 448
- Authentication Sequence 451
- RADIUS Client 454
- RADIUS C 455
- TACACS+ Client 459
- Web Server Commands 461
- Telnet Server Commands 466
- Secure Shell Commands 467
- Console(config)#ip ssh server 471
- Console#show ssh 477
- 802.1X Port Authentication 480
- 802.1X P 481
- Management IP Filter Commands 491
- Port Security Commands 496
- IP Source Guard Commands 498
- DHCP Snooping Commands 504
- Table 23-2 IP ACL Commands 516
- Console(config-std-acl)# 517
- permit host 10.1.1.21 522
- Console(config-ip-mask-acl)# 523
- MAC ACLs 529
- Console(config-mac-acl)# 530
- Console(config-mac-mask-acl)# 534
- MAC egress mask ACL: 537
- PE 23-25 538
- NFORMATION 539
- DESCRIPTION 543
- NEGOTIATION 545
- FLOWCONTROL 547
- SHUTDOWN 549
- SWITCHPORT 551
- INTERFACES 553
- COUNTERS 555
- GGREGATION 559
- PRIORITY 567
- Command Function Mode Page 573
- 0 to 50 Mbps on Port 1 580
- Aging time: 300 sec 588
- SPANNING 591
- 592
- PATHCOST 597
- Console(config-mstp)# 598
- DISABLED 603
- PORTFAST 607
- Table 30-1 VLAN Commands 617
- XTENSION 619
- Editing VLAN Groups 623
- Console(config)#vlan database 624
- Console(config-vlan)# 624
- Configuring VLAN Interfaces 625
- NTERFACES 627
- Displaying VLAN Information 632
- Table 31-1 Priority Commands 645
- Console#sh queue mode 648
- Wrr status: Enabled 648
- Console(config)#int eth 1/5 650
- Information of Eth 1/1 653
- Console(config)#map ip port 656
- IP Precedence Value 01234567 658
- CoS Value 01234567 658
- Console(config)#map ip dscp 659
- Related Commands 663
- Console(config-pmap-c)# 670
- INTERFACE 677
- IGMP Query Commands 687
- MVR VLAN: 699
- Table 34-1 DNS Commands 701
- Field Description 709
- Basic IP Configuration 711
- PPENDICES 719
- PECIFICATIONS 721
- Management Features 723
- Standards 723
- Management Information Bases 724
- ROUBLESHOOTING 727
- Using System Logs 729
- Glossary-1 731
- Glossary-2 732
- Glossary-3 733
- Glossary-4 734
- Glossary-5 735
- Glossary-6 736
- Glossary-7 737
- Glossary-8 738
- Glossary-9 739
- Glossary-10 740
- Numerics 741
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