H3C S3100 8C SI Operation Manual page 482

Operation Manual – DHCP
H3C S3100 Series Ethernet Switches
Note:
If you have configured a circuit ID with the vlan vlan-id argument specified, and the
other one without the argument in Ethernet port view, the former circuit ID applies to
the DHCP messages from the specified VLAN; while the latter one applies to DHCP
messages from other VLANs.
In a port aggregation group, you can use this command to configure the primary and
member ports respectively. When Option 82 is added, however, the circuit ID
sub-option is subject to the one configured on the primary port.
The circuit ID sub-option configured on a port will not be synchronized in the case of
port aggregation.
V. Configure the remote ID sub-option
You can configure the remote ID sub-option in system view or Ethernet port view:
In system view, the remote ID takes effect on all interfaces. You can configure
Option 82 as the system name (sysname) of the device or any customized
character string in the ASCII format.
In Ethernet port view, the remote ID takes effect only on the current interface. You
can configure Option 82 as any customized character string in the ASCII format for
different VLANs. That is to say, you can add different configuration rules for
packets from different VLANs.
Table 2-11 Configure the remote ID sub-option in Option 82
Enter system view
Configure the remote ID
sub-option in system view
Enter Ethernet port view
Configure the remote ID
sub-option in Ethernet
port view
Operation
system-view
dhcp-snooping
information remote-id
{ sysname | string
string }
interface interface-type
interface-number
dhcp-snooping
information [ vlan
vlan-id ] remote-id string
string
Chapter 2 DHCP Snooping Configuration
Command
2-12
Description
—
Optional
By default, the remote ID
sub-option is the MAC
address of the DHCP
snooping device that
received the DHCP
client's request.
—
Optional
By default, the remote ID
sub-option is the MAC
address of the DHCP
snooping device that
received the client's
request.