HP A6600 Configuration Manual page 182

The expected results after the configuration are:
• DHCP relay agent Provider A receives double-tagged packets sent from DHCP clients, terminates
these QinQ packets by removing their inner and outer VLAN tags, and forwards the packets to
DHCP server Provider B via the service provider network.
DHCP client A and client B can apply for IP addresses and related network configuration parameters
•
from Provider B via the service provider network.
Figure 65 Network diagram for QinQ termination supporting DHCP relay
DHCP relay agent
Switch A
Eth1/0/2
Switch B
Eth1/0/1
Eth1/0/2
Vlan 10
DHCP client A
Configuration procedure
Configure DHCP relay agent Provider A.
1.
# Enable DHCP service.
<ProviderA> system-view
[ProviderA] dhcp enable
# Create the DHCP server group.
[ProviderA] dhcp relay server-group 1 ip 10.2.1.1
# Create a Layer 3 Ethernet subinterface GigabitEthernet 1/0/1.100.
[ProviderA] interface gigabitethernet 1/0/1.100
# Configure GigabitEthernet 1/0/1.100 to terminate packets whose inner VLAN ID is 10 or 20.
[ProviderA-GigabitEthernet1/0/1.100] vlan-type dot1q vid 100 second-dot1q 10 20
# Enable DHCP relay on GigabitEthernet 1/0/1.100 and select a DHCP server group.
[ProviderA-GigabitEthernet1/0/1.100] dhcp select relay
[ProviderA-GigabitEthernet1/0/1.100] dhcp relay server-select 1
Provider A
S2/0/1
10.1.1.1/24
GE1/0/1.100
192.168.1.1/24
Eth1/0/1
VLAN100
Eth1/0/3
Switch C
Eth1/0/1
Eth1/0/2
Vlan 20
DHCP client B
DHCP server
Provider B
S2/0/1
Public
10.2.1.1/24
network
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