Chapter 26 IP Source Guard
MES-3528 User’s Guide
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You can configure the name and location of the file on the external TFTP server.
The file has the following format:
Figure 116
DHCP Snooping Database File Format
The <initial-checksum> helps distinguish between the bindings in the latest
update and the bindings from previous updates. Each binding consists of 72 bytes,
a space, and another checksum that is used to validate the binding when it is
read. If the calculated checksum is not equal to the checksum in the file, that
binding and all others after it are ignored.
26.1.1.3 DHCP Relay Option 82 Information
The Switch can add information to DHCP requests that it does not discard. This
provides the DHCP server more information about the source of the requests. The
Switch can add the following information:
• Slot ID (1 byte), port ID (1 byte), and source VLAN ID (2 bytes)
• System name (up to 32 bytes)
This information is stored in an Agent Information field in the option 82 field of the
DHCP headers of client DHCP request frames. See
for
more information about DHCP relay option 82.
When the DHCP server responds, the Switch removes the information in the Agent
Information field before forwarding the response to the original source.
You can configure this setting for each source VLAN. This setting is independent of
the DHCP relay settings (
26.1.1.4 Configuring DHCP Snooping
Follow these steps to configure DHCP snooping on the Switch.
1
Enable DHCP snooping on the Switch.
2
Enable DHCP snooping on each VLAN, and configure DHCP relay option 82.
<initial-checksum>
TYPE DHCP-SNOOPING
VERSION 1
BEGIN
<binding-1> <checksum-1>
<binding-2> <checksum-1-2>
...
...
<binding-n> <checksum-1-2-..-n>
END
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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 ...