HP VPN Firewall Appliances Network Management Configuration Guide

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{ 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 other padding
contents of sub-option 1 are length variable. See Figure 89.
Figure 89 Sub-option 1 in verbose pa
dding 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 88.
• Pr
ivate 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 on a centralized device or slot number of the receiving
port on a distributed device) and port (number of the receiving port). The value of the sub-option
type is 1.
Figure 90 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 91 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.
Figure 92 Sub-option 9 in private padding format
• Standard padding format: