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Chapter 26 IP Source Guard
GS2200-24 User’s Guide
216
• Use the
DHCP VLAN Configure
screen (
) to enable
DHCP snooping on each VLAN and to specify whether or not the Switch adds
DHCP relay agent option 82 information to DHCP requests that the Switch relays
to a DHCP server for each VLAN.
• Use the
ARP Inspection Status
screen (
) to look at
the current list of MAC address filters that were created because the Switch
identified an unauthorized ARP packet.
• Use the
ARP Inspection VLAN Status
screen (
) to
look at various statistics about ARP packets in each VLAN.
• Use the
ARP Inspection Log Status
screen (
) to
look at log messages that were generated by ARP packets and that have not
been sent to the syslog server yet.
• Use the
ARP Inspection Configure
screen (
) to
enable ARP inspection on the Switch. You can also configure the length of time
the Switch stores records of discarded ARP packets and global settings for the
ARP inspection log.
• Use the
ARP Inspection Port Configure
screen (
) to specify whether ports are trusted or untrusted ports for ARP inspection.
• Use the
ARP Inspection VLAN Configure
screen (
) to enable ARP inspection on each VLAN and to specify when the Switch
generates log messages for receiving ARP packets from each VLAN.
26.3 What You Need to Know
The Switch builds the binding table by snooping DHCP packets (dynamic bindings)
and from information provided manually by administrators (static bindings).
IP source guard consists of the following features:
• Static bindings. Use this to create static bindings in the binding table.
• DHCP snooping. Use this to filter unauthorized DHCP packets on the network
and to build the binding table dynamically.
• ARP inspection. Use this to filter unauthorized ARP packets on the network.
If you want to use dynamic bindings to filter unauthorized ARP packets (typical
implementation), you have to enable DHCP snooping before you enable ARP
inspection.
26.4 IP Source Guard
Use this screen to look at the current bindings for DHCP snooping and ARP
inspection. Bindings are used by DHCP snooping and ARP inspection to distinguish
Summary of Contents for GS2200-24 Series
Page 2: ......
Page 8: ...Safety Warnings GS2200 24 User s Guide 8 ...
Page 22: ...Table of Contents GS2200 24 User s Guide 22 ...
Page 24: ...24 ...
Page 30: ...Chapter 1 Getting to Know Your Switch GS2200 24 User s Guide 30 ...
Page 34: ...Chapter 2 Hardware Installation and Connection GS2200 24 User s Guide 34 ...
Page 42: ...42 ...
Page 70: ...Chapter 7 System Status and Port Statistics GS2200 24 User s Guide 70 ...
Page 84: ...Chapter 8 Basic Setting GS2200 24 User s Guide 84 ...
Page 86: ...86 ...
Page 104: ...Chapter 9 VLAN GS2200 24 User s Guide 104 Figure 51 Port Based VLAN Setup Port Isolation ...
Page 110: ...Chapter 10 Static MAC Forward Setup GS2200 24 User s Guide 110 ...
Page 138: ...Chapter 13 Spanning Tree Protocol GS2200 24 User s Guide 138 ...
Page 142: ...Chapter 14 Bandwidth Control GS2200 24 User s Guide 142 ...
Page 146: ...Chapter 15 Broadcast Storm Control GS2200 24 User s Guide 146 ...
Page 150: ...Chapter 16 Mirroring GS2200 24 User s Guide 150 ...
Page 160: ...Chapter 17 Link Aggregation GS2200 24 User s Guide 160 ...
Page 168: ...Chapter 19 Port Security GS2200 24 User s Guide 168 ...
Page 180: ...Chapter 21 Policy Rule GS2200 24 User s Guide 180 ...
Page 192: ...Chapter 23 VLAN Stacking GS2200 24 User s Guide 192 ...
Page 214: ...Chapter 25 AAA GS2200 24 User s Guide 214 ...
Page 240: ...Chapter 26 IP Source Guard GS2200 24 User s Guide 240 ...
Page 250: ...Chapter 28 Layer 2 Protocol Tunneling GS2200 24 User s Guide 250 ...
Page 251: ...251 PART IV IP Application Static Route 253 Differentiated Services 257 DHCP 261 ...
Page 252: ...252 ...
Page 256: ...Chapter 29 Static Route GS2200 24 User s Guide 256 ...
Page 270: ...270 ...
Page 300: ...Chapter 33 Access Control GS2200 24 User s Guide 300 ...
Page 306: ...Chapter 35 Syslog GS2200 24 User s Guide 306 ...
Page 314: ...Chapter 36 Cluster Management GS2200 24 User s Guide 314 ...
Page 318: ...Chapter 37 MAC Table GS2200 24 User s Guide 318 ...
Page 324: ...324 ...
Page 336: ...Chapter 41 Product Specifications GS2200 24 User s Guide 336 ...
Page 338: ...338 ...
Page 340: ...Appendix A Changing a Fuse GS2200 24 User s Guide 340 ...
Page 348: ...Appendix C Legal Information GS2200 24 User s Guide 348 ...
Page 358: ...Index GS2200 24 User s Guide 358 ...