H3C MSR 2600 Series, Configuration Manual

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NOTE:
The Second VLAN ID field is optional. If the received DHCPv6 request does not contain a second VLAN,
Option 18 also does not contain it.
DHCPv6 snooping support for Option 37
Option 37, also called the remote-ID option, is used to identify the client.
In H3C implementation, the DHCPv6 snooping device adds Option 37 to the received DHCPv6 request
message before forwarding it to the DHCPv6 server. This option provides client information about
address allocation.
Figure 91 Option 37 format
Figure 91 shows the Option 37 fields:
• Option code —Option code.
•
Option length —Size of the option data.
•
Enterprise number —Enterprise number.
• Port index —Port that receives the DHCPv6 request from the client.
• VLAN ID —ID of the outer VLAN.
•
Second VLAN ID —ID of the inner VLAN.
•
DUID —DUID of the DHCPv6 client.
NOTE:
The Second VLAN ID field is optional. If the received DHCPv6 request does not contain a second VLAN,
Option 37 also does not contain it.
DHCPv6 snooping configuration task list
Tasks at a glance
(Required.) Configuring basic DHCPv6 snooping
(Optional.) Configuring Option 18 and Option 37
(Optional.) Saving DHCPv6 snooping entries
(Optional.) Setting the maximum number of DHCPv6 snooping entries