H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 379)

35-6
Figure 35-5 Sub-option 1 in normal padding format
z
sub-option 2: Padded with the MAC address of the interface that received the client’s request. The
following figure gives its format. The value of the sub-option type is 2, and that of the remote ID type
is 0.
Figure 35-6 Sub-option 2 in normal padding format
2) Verbose padding format:
The padding contents for sub-options in the verbose padding format are:
z
sub-option 1: Padded with the user-specified access node identifier (ID of the device that adds
Option 82 in DHCP messages), and type, number, and VLAN ID of the port that received the
client’s request. Its format is shown in the following figure.
Figure 35-7 Sub-option 1 in verbose padding format
In the above figure, except that the VLAN ID field has a fixed length of 2 bytes, all the other padding
contents of sub-option 1 are length variable.
z
sub-option 2: Padded with the MAC address of the interface that received the client’s request. It
has the same format as that in normal padding format, as shown in
Figure 35-6 .
Option 184
Option 184 is a reserved option, and parameters in the option can be defined as needed. The device
supports Option 184 carrying the voice related parameters, so a DHCP client with voice functions can
get an IP address along with specified voice parameters from the DHCP server.
Option 184 involves the following sub-options:
z
Sub-option 1: IP address of the primary network calling processor, which is a server serving as the
network calling control source and providing program downloads.