Chapter 27 IP Source Guard
OLT2406 User’s Guide
243
27.10.1.3 DHCP Relay Option 82 Information
The OLT 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 OLT 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 OLT 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 (
27.10.1.4 DHCP Option 82 Settings Configuration Order
Here’s the configuration order for DHCP option 82 settings in different screens.
System’s Option Information
Go to the following screen to set up the option 82 Circuit ID and Remote ID information for the OLT.
1
IP Application
>
DHCP
>
Option
(
Option 82 Circuit Id
)
2
IP Application
>
DHCP
>
Option
(
Option 82 Remote Id
)
System’s Format
Go to the following screens to apply the default Circuit ID format globally on the OLT or to the specified
VLAN domain of the DHCP clients.
1
IP Application
>
DHCP
>
VLAN
(
Format
)
2
IP Application
>
DHCP
>
Global
(
Format
)
System’s Option & Information
Go to the following screens to have the OLT add the Circuit ID sub-option, Remote ID sub-option, and
system name globally or in the specified VLAN.
1
IP Application
>
DHCP
>
VLAN
(
Relay Agent Information Option 82
)
2
IP Application
>
DHCP
>
VLAN
(
Information
)
3
IP Application
>
DHCP
>
Global
(
Relay Agent Information Option 82
)
4
IP Application
>
DHCP
>
Global
(
Information
)
5
Advanced Application
>
IP Source Guard
>
DHCP Snooping
>
Configure
>
VLAN
(
Option82
)
Summary of Contents for OLT2406
Page 4: ...Document Conventions OLT2406 User s Guide 4 Desktop Laptop Switch IP Phone Smart T V...
Page 32: ...Table of Contents OLT2406 User s Guide 32 Index 758...
Page 33: ...33 PART I Introduction and Hardware Installation...
Page 63: ...63 PART II Web Configurator...
Page 179: ...Chapter 21 Classifier OLT2406 User s Guide 179 Figure 112 Classifier Example...
Page 182: ...Chapter 22 Policy Rule OLT2406 User s Guide 182 Figure 113 Advanced Application Policy Rule...
Page 186: ...Chapter 22 Policy Rule OLT2406 User s Guide 186 Figure 114 Policy Example...
Page 248: ...Chapter 28 Loop Guard OLT2406 User s Guide 248 Figure 151 Advanced Application Loop Guard...
Page 393: ...393 PART III CLI Commands...
Page 581: ...Chapter 78 VoIP OLT2406 User s Guide 581...
Page 725: ...725 PART IV Troubleshooting Specifications Appendices and Index...
