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Restrictions and guidelines: DHCPv6 snooping
configuration
DHCPv6 snooping works between the DHCPv6 client and server, or between the DHCPv6 client and
DHCPv6 relay agent.
DHCPv6 snooping does not work between the DHCPv6 server and DHCPv6 relay agent.
DHCPv6 snooping tasks at a glance
Tasks at a glance
(Required.)
(Optional.)
Configuring support for Option 18
(Optional.)
Configuring support for Option 37
(Optional.)
Configuring DHCPv6 snooping entry auto backup
(Optional.)
Setting the maximum number of DHCPv6 snooping entries
(Optional.)
Enabling DHCPv6-REQUEST check
(Optional.)
Configuring a DHCPv6 packet blocking port
(Optional.)
Enabling DHCPv6 snooping logging
Configuring basic DHCPv6 snooping
Restrictions and guidelines
Follow these guidelines when you configure basic DHCPv6 snooping:
•
To make sure DHCPv6 clients can obtain valid IPv6 addresses, specify the ports connected to
authorized DHCPv6 servers as trusted ports. The trusted ports and the ports connected to
DHCPv6 clients must be in the same VLAN.
•
If you configure DHCPv6 snooping settings on a Layer 2 Ethernet interface that is a member
port of a Layer 2 aggregate interface, the settings do not take effect unless the interface is
removed from the aggregation group.
Procedure
To configure basic DHCPv6 snooping:
Step
1.
Enter system view.
2.
Enable DHCPv6 snooping.
3.
Enter interface view.
4.
Specify the port as a trusted
port.
5.
Return to system view.
Configuring basic DHCPv6 snooping
Command
system-view
ipv6 dhcp snooping enable
interface interface-type
interface-number
ipv6 dhcp snooping trust
quit
205
Remarks
N/A
By default, DHCPv6 snooping is
disabled.
This interface must connect to the
DHCPv6 server.
By default, all ports are untrusted
ports after DHCPv6 snooping is
enabled.
N/A
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Troubleshooting
