3Com 5500-EI PWR, Справочное руководство

Страница: 723 / 1314

3-4
Use the undo dhcp-snooping information remote-id command to restore the default value of the
remote ID sub-option in Option 82.
By default, the remote ID sub-option in Option 82 is the MAC address of the DHCP Snooping device
that received the DHCP client’s request.
Examples
# Configure the remote ID sub-option of Option 82 as the system name (sysname) of the DHCP
snooping device.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] dhcp-snooping information remote-id sysname
dhcp-snooping information strategy
Syntax
dhcp-snooping information strategy { drop | keep | replace }
undo dhcp-snooping information strategy
View
System view, Ethernet port view
Parameters
drop : If a packet contains Option 82, DHCP snooping drops this packet.
keep : If a packet contains Option 82, DHCP snooping keeps and forwards this packet.
replace : If a packet contains Option 82, DHCP snooping replaces the original Option 82 field with the
Option 82 field having the specified padding content and forwards the packet.
Description
Use the dhcp-snooping information strategy command in system view to configure a handling policy
for DHCP requests that contain Option 82 sent by the DHCP client.
Use the undo dhcp-snooping information strategy command to restore the default handling policy.
Use the dhcp-snooping information strategy command in Ethernet port view to configure a handling
policy for requests that contain Option 82 received on the current port.
Use the undo dhcp-snooping information strategy command to restore the default handling policy.
By default, after DHCP-snooping Option 82 support is enabled, DHCP snooping replaces the Option 82
field in the requests sent by the DHCP clients.