Configuring Dhcp Snooping To Support Option 82 - H3C S3100 8C SI Operation Manual

Operation Manual – DHCP
H3C S3100 Series Ethernet Switches
Display information about
unauthorized DHCP
servers
Note:
You need to enable DHCP snooping before enabling unauthorized DHCP server
detection.
Do not configure unauthorized DHCP server detection on a member port of a link
aggregation group.
Currently, after specifying the source MAC address for DHCP-DISCOVER
messages on an S3100-SI series switch, you cannot use the VLAN-VPN tunnel
function at the same time, and vice versa. In addition, after you specify the source
MAC address for DHCP-DISCOVER messages, the IGMP snooping function
cannot learn router interfaces through PIM messages. For information about router
interfaces, refer to Multicast Operation.

2.3.1 Configuring DHCP Snooping to Support Option 82

Note:
Only the S3100-EI series among S3100 series switches support the
DHCP-snooping Option 82 support feature.
Enable DHCP snooping and specify trusted ports on the switch before configuring
DHCP snooping to support Option 82.
Table 2-6 DHCP-snooping Option 82 support configuration task list
Enable DHCP-snooping Option 82 support
Configure a handling policy for DHCP packets with Option 82
Configure the storage format of Option 82
Configure the circuit ID sub-option
Configure the remote ID sub-option
Configure the padding format for Option 82
Operation
display dhcp-snooping
server-guard
Task
Chapter 2 DHCP Snooping Configuration
Command
2-9
Description
Available in any view
Remarks
Required
Optional
Optional
Optional
Optional
Optional