HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Services Conf - Page 39

Sub-option 1,

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Figure 22 Sub-option 2 in normal padding format • Verbose padding format { Sub-option 1-Contains the user-specified access node identifier (ID of the device that adds Option 82 in DHCP messages), and the type, number, and VLAN ID of the interface that received the client's request. The VLAN ID field has a fixed length of 2 bytes. All the other padding contents of sub-option 1 are length variable. See Figure 23. Figure 23 Sub-option 1 in verbose padding format { Sub-option 2-Contains the MAC address of the DHCP relay agent interface or the MAC address of the DHCP snooping device that received the client's request. It has the same format as that in normal padding format. See Figure 22. • Private padding format { Sub-option 1-Contains the VLAN ID of the interface that received the client's request, module (subcard number of the receiving port) and port (port number of the receiving port). The value of the sub-option type is 1. Figure 24 Sub-option 1 in private padding format { Sub-option 2-Contains the MAC address of the DHCP snooping device that received the client's request. The value of the sub-option type is 2. Figure 25 Sub-option 2 in private padding format { Sub-option 9-Contains the Sysname and the primary IP address of the Loopback0 interface. The value of the sub-option type is 9. 31

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31
Figure 22
Sub-option 2 in normal padding format
•
Verbose padding format
{
Sub-option 1
—Contains the user-specified access node identifier (ID of the device that adds
Option 82 in DHCP messages), and the type, number, and VLAN ID of the interface that
received the client's request. The VLAN ID field has a fixed length of 2 bytes. All the other
padding contents of sub-option 1 are length variable. See
Figure 23
.
Figure 23
Sub-option 1 in verbose padding format
{
Sub-option 2
—Contains the MAC address of the DHCP relay agent interface or the MAC
address of the DHCP snooping device that received the client's request. It has the same format
as that in normal padding format. See
Figure 22
.
•
Private padding format
{
Sub-option 1
—Contains the VLAN ID of the interface that received the client's request, module
(subcard number of the receiving port) and port (port number of the receiving port). The value
of the sub-option type is 1.
Figure 24
Sub-option 1 in private padding format
{
Sub-option 2
—Contains the MAC address of the DHCP snooping device that received the
client's request. The value of the sub-option type is 2.
Figure 25
Sub-option 2 in private padding format
{
Sub-option 9
—Contains the Sysname and the primary IP address of the Loopback0 interface.
The value of the sub-option type is 9.