H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 322)

31-8
z
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.
z
The circuit ID sub-option configured on a port will not be synchronized in the case of port
aggregation.
Configure the remote ID sub-option
You can configure the remote ID sub-option in system view or Ethernet port view:
z
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.
z
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.
Follow these steps to configure the remote ID sub-option in Option 82:
To do… Use the command… Remarks
Enter system view system-view —
Configure the remote ID
sub-option in system view
dhcp-snooping information
remote-id
{ sysname | string
string }
Optional
By default, the remote ID sub-option
is the MAC address of the DHCP
snooping device that received the
DHCP client’s request.
Enter Ethernet port view
interface interface-type
interface-number
—
Configure the remote ID
sub-option in Ethernet port view
dhcp-snooping information
[ vlan vlan-id ] remote-id string
string
Optional
By default, the remote ID sub-option
is the MAC address of the DHCP
snooping device that received the
client’s request.
z
If you configure a remote ID sub-option in both system view and on a port, the remote ID sub-option
configured on the port applies when the port receives a packet, and the global remote ID applies to
other interfaces that have no remote ID sub-option configured.
z
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 remote ID is subject to the one configured on
the primary port.
z
The remote ID configured on a port will not be synchronized in the case of port aggregation.
Configure the padding format for Option 82
Follow these steps to configure the padding format for Option 82: