ZyXEL Communications ZyWall USG20-VPN, User Manual

Page: 198 / 683

Chapter 9 Interfaces
USG20(W)-VPN Series User’s Guide
198
Enable Router
Advertisement
Select this to enable this interface to send router advertisement messages periodically.
See
IPv6 Router Advertisement on page 146 for more information.
Advertised Hosts
Get Network
Configuration
From DHCPv6
Select this to have the USG indicate to hosts to obtain network settings (such as prefix
and DNS settings) through DHCPv6.
Clear this to have the USG indicate to hosts that DHCPv6 is not available and they
should use the prefix in the router advertisement message.
Advertised Hosts
Get Other
Configuration
From DHCPv6
Select this to have the USG indicate to hosts to obtain DNS information through
DHCPv6.
Clear this to have the USG indicate to hosts that DNS information is not available in this
network.
Router
Preference
Select the router preference ( Low , Medium or High ) for the interface. The interface
sends this preference in the router advertisements to tell hosts what preference they
should use for the USG. This helps hosts to choose their default router especially when
there are multiple IPv6 router in the network.
Note: Make sure the hosts also support router preference to make this function work.
MTU The Maximum Transmission Unit. Type the maximum size of each IPv6 data packet, in
bytes, that can move through this interface. If a larger packet arrives, the USG divides
it into smaller fragments.
Hop Limit Enter the maximum number of network segments that a packet can cross before
reaching the destination. When forwarding an IPv6 packet, IPv6 routers are required to
decrease the Hop Limit by 1 and to discard the IPv6 packet when the Hop Limit is 0.
Advertised
Prefix Table
Configure this table only if you want the USG to advertise a fixed prefix to the network.
Add Click this to create an IPv6 prefix address.
Edit Select an entry in this table and click this to modify it.
Remove Select an entry in this table and click this to delete it.
# This field is a sequential value, and it is not associated with any entry.
IPv6
Address/
Prefix Length
Enter the IPv6 network prefix address and the prefix length.
The prefix length indicates what the left-most part of the IP address is the same for all
computers in the network, that is, the network address.
Advertised
Prefix from
DHCPv6 Prefix
Delegation
Use this table to configure the network prefix if you want to use a delegated prefix as
the beginning part of the network prefix.
Add Click this to create an entry in this table.
Edit Select an entry in this table and click this to modify it.
Remove Select an entry in this table and click this to delete it.
# This field is a sequential value, and it is not associated with any entry.
Delegated
Prefix
Select the DHCPv6 request object to use for generating the network prefix for the
network.
Suffix
Address
Enter the ending part of the IPv6 network address plus a slash (/) and the prefix
length. The USG will append 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.
Table 76
Configuration > Network > Interface > VLAN > Add / Edit (continued)
LABEL DESCRIPTION