QTECH QSW-3400 Инструкция по настройке - Manual (Page 263)

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DHCPv6 relay option schematic
Switch2 configuration:
S2(config)#service dhcpv6
S2(config)#ipv6 dhcp relay remote-id option
S2(config)#ipv6 dhcp relay subscriber-id option
S2(config)#vlan 10
S2(config-vlan10)#int vlan 10
S2(config-if-vlan10)#ipv6 address 2001:da8:1:::2/64
S2(config-if-vlan10)#ipv6 dhcp relay destination 2001:da8:10:1::1
S2(config-if-vlan10)#exit
S2(config)#
33.4 DHCPv6 option37, 38 Troubleshooting

Request packets sent by DHCPv6 client are multicast packets received by the device
within its VLAN, if DHCPv6 server wants to receive the packets from client, DHCPv6
client and DHCPv6 server must be in the same VLAN, otherwise it needs to use
DHCPv6 relay.

Snooping option37,38 can process one of the following operations for DHCPv6 request
packets with option37,38: replace the original option37,38 with its own; discard the
packets with option37,38; do not execute adding, discarding or forwarding operation.
Therefore, please check policy configuration of snooping option37,38 on second device
when obtaining the false address or no address is obtained according to option37,38.

DHCPv6 server obtains option37,38 of the packets from client by default, if no, it will
obtain option37,38 of the packet sent by relay.

DHCPv6 server only checks whether the first DHCPv6 relay adds option37,38 that
means only option37,38 of the innermost relay-forw is valid in relay packets.