PLANET WGSW-52040 - Manual (Page 284)

34.4 DHCP Option 60 and Option 43 Troubleshooting
If problems occur when configuring DHCP option 60 and option 43, please check whether the
problem is caused by the following reasons:
 Check whether service dhcp function is enabled
 If the address pool configured option 60, check whether it matches with the option 60
of the packets
Chapter 35 DHCPv6 Options 37, 38
35.1 Introduction to DHCPv6 Options 37, 38
DHCPv6 (Dynamic Host Configuration Protocol for IPv6) is designed for IPv6 address scheme
and is used for assigning IPv6 prefixes, IPv6 addresses and other configuration parameters to
hosts.
When DHCPv6 client wants to request address and configure parameter of DHCPv6 server
from different link, it needs to communicate with server through DHCPv6 relay agent. DHCPv6
message received by relay agent node is reencapsulated to be relay-forward packets and they
are forwarded to the server which sends the relay-reply packets to DHCPv6 relay agent node
in different link, after that, relay agent node restores DHCPv6 message to DHCPv6 client to
finish communication between client and server.
There are some problems when using DHCPv6 relay agent, for example: How to assign IP
address in the fixed range to the specifiec users? How to avoid illegal DHCPv6 client to forge
IP address exhaust attack triggered by MAC address fields of DHCPv6 packets? How to avoid
illegal DHCPv6 client to trigger deny service attack through using MAC address of other legal
clients? Therefore, IETF set rfc4649 and rfc4580, i.e. DHCPv6 option 37 and option 38 to
solve these problems.
DHCPv6 option 37 and option 38 is similar to DHCP option 82. When DHCPv6 client sends
request packets to DHCPv6 server though DHCPv6 relay agent, if DHCPv6 relay agent
supports option 37 and option 38, they will be added to request packets. For the respond
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