Configuring The Maximum Number Of Dhcpv6 Snooping Entries An Interface Can Learn; Displaying And Maintaining Dhcpv6 Snooping; Dhcpv6 Snooping Configuration Example; Network Requirements - HP A5120 EI Series Configuration Manual

NOTE:

You must specify a port connected to an authorized DHCPv6 server as trusted to ensure that DHCPv6 clients can
obtain valid IPv6 addresses. The trusted port and the ports connected to the DHCPv6 clients must be in the same
VLAN.

If a Layer 2 Ethernet interface is added to an aggregation group, the DHCPv6 snooping configuration of the
interface will not take effect until the interface quits from the aggregation group.
Configuring the maximum number of DHCPv6
Snooping entries an interface can learn
Follow these steps to configure the maximum number of DHCPv6 snooping entries an interface can learn:
To do...
Enter system view
Enter interface view
Configure the maximum number
of DHCPv6 snooping entries that
the interface can learn

Displaying and maintaining DHCPv6 snooping

To do...
Display DHCPv6 snooping
trusted ports
Display DHCPv6 snooping
entries
Clear DHCPv6 snooping
entries

DHCPv6 snooping configuration example

Network requirements

As shown in
1/0/1, and is connected to DHCPv6 clients through GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3.
These three interfaces belong to VLAN 2. Configure Switch B to do the following:
Forwarding DHCPv6 reply messages received on GigabitEthernet 1/0/1 only.

Recording the IP-to-MAC mappings for DHCPv6 clients.

Use the command...
system-view
interface interface-type interface-
number
ipv6 dhcp snooping max-
learning-num number
Use the command...
display ipv6 dhcp snooping trust [ | { begin |
exclude | include } regular-expression ]
display ipv6 dhcp snooping user-binding { ipv6-
address | dynamic } [ | { begin | exclude |
include } regular-expression ]
reset ipv6 dhcp snooping user-binding { ipv6-
address | dynamic }
Figure 71, Switch B is connected to a DHCPv6 server (Switch A) through GigabitEthernet
Remarks
—
—
Optional
By default, the number of DHCPv6
snooping entries learned by an
interface is not limited.
164
Remarks
Available in any view
Available in any view
Available in user
view