Chapter 26 IP Source Guard
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• They appear only in the ARP Inspection screens and commands, not in the
MAC Address Filter screens and commands.
26.1.2.2 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.
26.1.2.3 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.
26.1.2.4 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.
26.2 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
between authorized and unauthorized packets in the network. The Switch learns
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Страница 8: ...Safety Warnings MES 3528 User s Guide 8 ...
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Страница 32: ...Chapter 2 Hardware Installation and Connection MES 3528 User s Guide 32 ...
Страница 42: ...Chapter 3 Hardware Overview MES 3528 User s Guide 42 ...
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Страница 60: ...Chapter 5 Initial Setup Example MES 3528 User s Guide 60 ...
Страница 76: ...Chapter 7 System Status and Port Statistics MES 3528 User s Guide 76 ...
Страница 88: ...Chapter 8 Basic Setting MES 3528 User s Guide 88 ...
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Страница 109: ...Chapter 9 VLAN MES 3528 User s Guide 109 Figure 57 Port Based VLAN Setup Port Isolation ...
Страница 114: ...Chapter 10 Static MAC Forward Setup MES 3528 User s Guide 114 ...
Страница 146: ...Chapter 14 Bandwidth Control MES 3528 User s Guide 146 ...
Страница 160: ...Chapter 17 Link Aggregation MES 3528 User s Guide 160 ...
Страница 168: ...Chapter 19 Port Security MES 3528 User s Guide 168 ...
Страница 180: ...Chapter 21 Policy Rule MES 3528 User s Guide 180 ...
Страница 192: ...Chapter 23 VLAN Stacking MES 3528 User s Guide 192 ...
Страница 231: ...Chapter 26 IP Source Guard MES 3528 User s Guide 231 Figure 120 DHCP Snooping ...
Страница 248: ...Chapter 26 IP Source Guard MES 3528 User s Guide 248 ...
Страница 257: ...257 PART IV IP Application Static Route 259 Differentiated Services 263 DHCP 267 ...
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Страница 262: ...Chapter 29 Static Route MES 3528 User s Guide 262 ...
Страница 274: ...Chapter 31 DHCP MES 3528 User s Guide 274 ...
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Страница 284: ...Chapter 32 Maintenance MES 3528 User s Guide 284 ...
Страница 306: ...Chapter 33 Access Control MES 3528 User s Guide 306 ...
Страница 312: ...Chapter 35 Syslog MES 3528 User s Guide 312 ...
Страница 320: ...Chapter 36 Cluster Management MES 3528 User s Guide 320 ...
Страница 324: ...Chapter 37 MAC Table MES 3528 User s Guide 324 ...
Страница 329: ...329 PART VI Troubleshooting Product Specifications Troubleshooting 331 Product Specifications 335 ...
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Страница 342: ...Chapter 41 Product Specifications MES 3528 User s Guide 342 ...
Страница 343: ...343 PART VII Appendices and Index Changing a Fuse 345 Common Services 347 Legal Information 351 Index 355 ...
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Страница 346: ...Appendix A Changing a Fuse MES 3528 User s Guide 346 ...
Страница 354: ...Appendix C Legal Information MES 3528 User s Guide 354 ...
Страница 364: ...Index MES 3528 User s Guide 364 ...