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C
HAPTER
14
| Security Measures
DHCP Snooping
– 375 –
◆
DHCP Snooping Status
– Enables or disables DHCP snooping for the
selected VLAN. When DHCP snooping is enabled globally on the switch,
and enabled on the specified VLAN, DHCP packet filtering will be
performed on any untrusted ports within the VLAN. (Default: Disabled)
W
EB
I
NTERFACE
To configure global settings for DHCP Snooping:
1.
Click Security, DHCP Snooping.
2.
Select Configure VLAN from the Step list.
3.
Enable DHCP Snooping on any existing VLAN.
4.
Click Apply
Figure 207: Configuring DHCP Snooping on a VLAN
C
ONFIGURING
P
ORTS
FOR
DHCP S
NOOPING
Use the IP Service > DHCP > Snooping (Configure Interface) page to
configure switch ports as trusted or untrusted.
CLI R
EFERENCES
◆
"ip dhcp snooping trust" on page 775
C
OMMAND
U
SAGE
◆
A trusted interface is an interface that is configured to receive only
messages from within the network. An untrusted interface is an
interface that is configured to receive messages from outside the
network or fire wall.
◆
When DHCP snooping is enabled both globally and on a VLAN, DHCP
packet filtering will be performed on any untrusted ports within the
VLAN.
◆
When an untrusted port is changed to a trusted port, all the dynamic
DHCP snooping bindings associated with this port are removed.
◆
Set all ports connected to DHCP servers within the local network or fire
wall to trusted state. Set all other ports outside the local network or fire
wall to untrusted state.
Summary of Contents for ECS4810-12M Layer 2
Page 1: ...Management Guide www edge core com ECS4810 12M Layer 2 Gigabit Ethernet Switch...
Page 2: ......
Page 4: ......
Page 6: ...ABOUT THIS GUIDE 6...
Page 54: ...SECTION I Getting Started 54...
Page 64: ...CHAPTER 1 Introduction System Defaults 64...
Page 82: ...CHAPTER 2 Initial Switch Configuration Managing System Files 82...
Page 84: ...SECTION II Web Configuration 84...
Page 102: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 102...
Page 206: ...CHAPTER 6 VLAN Configuration Configuring VLAN Mirroring 206...
Page 256: ...CHAPTER 11 Class of Service Layer 3 4 Priority Settings 256...
Page 378: ...CHAPTER 14 Security Measures DHCP Snooping 378...
Page 520: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 520...
Page 528: ...CHAPTER 17 IP Services Displaying the DNS Cache 528...
Page 586: ...CHAPTER 19 Using the Command Line Interface CLI Command Groups 586...
Page 676: ...CHAPTER 22 SNMP Commands 676...
Page 684: ...CHAPTER 23 Remote Monitoring Commands 684...
Page 816: ...CHAPTER 27 Access Control Lists ACL Information 816...
Page 866: ...CHAPTER 30 Port Mirroring Commands RSPAN Mirroring Commands 866...
Page 884: ...CHAPTER 32 Automatic Traffic Control Commands 884...
Page 890: ...CHAPTER 33 Address Table Commands 890...
Page 986: ...CHAPTER 37 Class of Service Commands Priority Commands Layer 3 and 4 986...
Page 1006: ...CHAPTER 38 Quality of Service Commands 1006...
Page 1068: ...CHAPTER 39 Multicast Filtering Commands Multicast VLAN Registration 1068...
Page 1092: ...CHAPTER 40 LLDP Commands 1092...
Page 1134: ...CHAPTER 41 CFM Commands 1134...
Page 1154: ...CHAPTER 43 Domain Name Service Commands 1154...
Page 1160: ...CHAPTER 44 DHCP Commands DHCP Client 1160...
Page 1194: ...CHAPTER 45 IP Interface Commands IPv6 Interface 1194...
Page 1196: ...SECTION IV Appendices 1196...
Page 1202: ...APPENDIX A Software Specifications Management Information Bases 1202...
Page 1224: ...COMMAND LIST 1224...
Page 1234: ...INDEX 1234...
Page 1235: ......