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Chapter 26 IP Source Guard
GS2200-24 User’s Guide
239
26.12.2.2 Trusted vs. Untrusted Ports
Every port is either a trusted port or an untrusted port for ARP inspection. This
setting is independent of the trusted/untrusted setting for DHCP snooping. You
can also specify the maximum rate at which the Switch receives ARP packets on
untrusted ports.
The Switch does not discard ARP packets on trusted ports for any reason.
The Switch discards ARP packets on untrusted ports in the following situations:
• The sender’s information in the ARP packet does not match any of the current
bindings.
• The rate at which ARP packets arrive is too high.
26.12.2.3 Syslog
The Switch can send syslog messages to the specified syslog server (
) when it forwards or discards ARP packets. The Switch can
consolidate log messages and send log messages in batches to make this
mechanism more efficient.
26.12.2.4 Configuring ARP Inspection
Follow these steps to configure ARP inspection on the Switch.
1
Configure DHCP snooping. See
.
Note: It is recommended you enable DHCP snooping at least one day before you
enable ARP inspection so that the Switch has enough time to build the binding
table.
2
Enable ARP inspection on each VLAN.
3
Configure trusted and untrusted ports, and specify the maximum number of ARP
packets that each port can receive per second.
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 ...