ZyXEL Communications 3.1 User Manual

Chapter 6 Interfaces

ZyWALL (ZLD) CLI Reference Guide

nd ra prefix-advertisement 

Configures the network prefix to use a delegated prefix as the beginning 
part of the network prefix. 

: Specify the DHCPv6 request object to use for 

generating the network prefix for the network.

: Specify the ending part of the IPv6 network address 

plus a slash (/) and the prefix length. The ZyWALL appends it to the 
selected delegated prefix. The combined address is the network prefix 
for the network.

For example, you got a delegated prefix of 2003:1234:5678/48. You 
want to divide it into 2003:1234:5678:1111/64 for this interface and 
2003:1234:5678:2222/64 for another interface. You can use ::1111/64 
and ::2222/64 for the suffix address respectively. But if you do not want 
to divide the delegated prefix into subnetworks, enter ::0/48 here, 
which keeps the same prefix length (/48) as the delegated prefix.

dhcp6 { server | client | relay upper 

{ config_interface | ipv6_addr } }

Sets the IPv6 interface to be a DHCPv6 server, client or relay. For relay, 
specify an interface from which to get the DHCPv6 server’s address or 
the IPv6 address of a DHCPv6 server. 

dhcp6 rapid-commit

This shortens the DHCPv6 message exchange process from four to two 
steps to help reduce network traffic.

Note: Make sure you also enable this option in the DHCPv6 clients to 

make rapid commit work.

dhcp6 address-request

Get this interface’s IPv6 address from the DHCPv6 server. 

dhcp6 refresh-time { 

<600..4294967294> | infinity }

Sets the number of seconds a DHCPv6 client should wait before 
refreshing information retrieved from DHCPv6.

dhcp6 duid { duid | mac }

Specify the DHCP Unique IDentifier (DUID) of the interface or have it 
generated from the interface’s default MAC address.

dhcp6-lease-object dhcp6_profile

For a DHCPv6 server interface, specify the profile of DHCPv6 lease 
settings to offer to DHCPv6 clients.

dhcp6-request-object dhcp6_profile

For a DHCPv6 client interface, specify the profile of DHCPv6 request 
settings that determine what additional information to get from the 
DHCPv6 server.

interface interface_name no ipv6

Enters the sub-command mode for deleting the specified IPv6 address 
or removing it’s settings. 

enable

Turns off the IPv6 interface.

address ipv6_addr_prefix

Removes the IPv6 interface’s IPv6 prefix setting.

gateway

Removes the IPv6 interface’s gateway setting.

nd ra accept

Sets the IPv6 interface to discard IPv6 neighbor discovery router 
advertisement messages.

nd ra advertise

Has the IPv6 interface not send IPv6 neighbor discovery router 
advertisement messages.

nd ra managed-config-flag

Turns off the flag in IPv6 router advertisements that tells hosts to use 
managed (stateful) protocol for address autoconfiguration in addition to 
any addresses autoconfigured using stateless address 
autoconfiguration. 

nd ra other-config-flag

Turns off the other stateful configuration flag in IPv6 router 
advertisements that tells hosts to use administered (stateful) protocol to 
obtain autoconfiguration information other than addresses. 

nd ra mtu

Removes the Maximum Transmission Unit (MTU) size setting for IPv6 
packets the interface sends.

interface General Commands: Basic Properties and IP Address Assignment (continued)