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Page 21 / 270 Scroll up to view Page 16 - 20
Unified Services Router
User Manual
19
Figure 4: IPv6 LAN and DHCPv6 configuratio n
If you change the IP address and click Save Settings, the GUI will not respond.
Open a new connection to the new IP address and log in again. Be sure the LAN
host (the machine used to manage the router) has obtained IP address from newly
assigned pool (or has a static IP address in th
e router’s LAN subnet) before
accessing the router via changed IP address.
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Unified Services Router
User Manual
20
As with an IPv4 LAN network, the router has a DHCPv6 server. If enabled, the
router assigns an IP address within the specified range plus additional specified
information to any LAN PC that requests DHCP served addresses .
The following settings are used to configure the DHCPv6 server:
DHCP Mode: The IPv6 DHCP server is either stateless or stateful. If stateless is
selected an external IPv6 DHCP server is not required as the IPv6 LAN hosts
are auto-configured by this router. In this case the router advertisement daemon
(RADVD) must be configured on this device and ICMPv6 router discovery
messages are used by the host for auto -configuration. There are no managed
addresses to serve the LAN nodes. If stateful is selected the IPv6 LAN host will
rely on an external DHCPv6 server to provide required configuration settings
The domain name of the DHCPv6 server is an optional setting
Server Preference is used to indicate the pre ference level of this DHCP server.
DHCP advertise messages with the highest server preference value to a LAN
host are preferred over other DHCP server advertise messages. The default is
255.
The DNS server details can be manually entered here (primary/secondary
options. An alternative is to allow the LAN DHCP client to receive the DNS
server details from the ISP directly. By selecting Use DNS proxy, this router
acts as a proxy for all DNS requests and communicates
with the ISP’s DNS
servers (a WAN configuration parameter).
Primary and Secondary DNS servers: If there is configured domain name
system (DNS) servers available on the LAN enter the IP addresses here.
Lease/Rebind time sets the duration of the DHCPv6 lease from this router to the
LAN client.
IPv6 Address Pools
This feature allows you to define the IPv6 delegation prefix for a range of IP
addresses
to be served by the gateway’s DHCPv6 server
. Using a delegation prefix
you can automate the process of informing other networking equipment on the LAN
of DHCP information specific for the assigned prefix.
Prefix Delegation
The following settings are used to configure the Prefix Delegation:
Prefix Delegation: Select this option to enable prefix delegation in DHCPv6
server. This option can be selected only in Stateless Address Auto
Configuration mode of DHCPv6 server.
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Unified Services Router
User Manual
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Prefix Address: IPv6 prefix address in the DHCPv6 server prefix pool
Prefix Length: Length prefix address
2.1.4 Configuring IPv6 Router Advertisements
Router Advertisements are analogous to IPv4 DHCP assignments for LAN clients, in
that the router will assign an IP address and supporting network information to
devices that are configured to accept such details. Router Advertisement is required
in an IPv6 network is required for stateless auto configuration of the IPv6 LAN. By
configuring the Router Advertisement Daemon on this router, the DSR will listen on
the LAN for router solicitations and respond to these LAN hosts with rout er
advisements.
RADVD
Advanced > IPv6 > IPv6 LAN > Router Advertisement
To support stateless IPv6 auto configuration on the LAN, set the RADVD status to
Enable. The following settings are used to configure RADVD:
Advertise Mode: Select Unsolicited Multicast to send router advertisements
(RA’s) to all interfaces in the multicast group.
To restrict RA’s to
well-
known IPv6 addresses on the LAN, and thereby reduce overall network
traffic, select Unicast only.
Advertise Interval: When advertisements are unsolicited multicast packets,
this interval sets the maximum time between advertisements from the
interface. The actual duration between advertisements is a random value
between one third of this field and this field. The default is 30 seconds.
RA Flags :
The router advertisements (RA’s) can be sent with one or both of
these flags. Chose Managed to use the administered /sta teful protocol for
address auto configuration. If the Other flag is selected the host uses
administered/stateful protocol for non-address auto configuration.
Router
Preference:
this
low/medium/high parameter determines the
preference associated with the RADVD process of the router. This is useful
if there are other RADVD enabled devices on the LAN as it helps avoid
conflicts for IPv6 clients.
MTU: The router advertisement will set this maximum transmission unit
(MTU) value for all nodes in the LAN that are auto configured by the router.
The default is 1500.
Router Lifetime:
This value is present in RA’s and indicates the usefulnes
s
of this router as a default router for the interface. The default is 3600
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Unified Services Router
User Manual
22
seconds. Upon expiration of this value, a new RADVD exchange must take
place between the host and this router.
Figure 5: Configuring the Route r Adve rtise me nt Dae mon
Advertisement Prefixes
Advanced > IPv6 > IPv6 LAN > Advertisement Prefixes
The router advertisements configured with advertisement prefixes allow this router
to inform hosts how to perform stateless address auto configuration. Router
advertis ements contain a list of subnet prefixes that allow the router to determine
neighbours and whether the host is on the same link as the router.
The following prefix options are available for the router advertisements:
IPv6 Prefix Type: To ensure hosts support IPv6 to IPv4 tunnel select the
6to4 prefix type. Selecting Global/Local/ISATAP will allow the nodes to
support all other IPv6 routing options
SLA ID: The SLA ID (Site-Level Aggregation Identifier) is available when
6to4 Prefixes are selected. This
should be the interface ID of the router’s
LAN interface used for router advertisements.
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Unified Services Router
User Manual
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IPv6 Prefix: When using Global/Local/ISATAP prefixes, this field is used to
define the IPv6 network advertised by this router.
IPv6 Prefix Length: This value indicates the number contiguous, higher
order bits of the IPv6 address that define up the network portion of the
address. Typically this is 64.
Prefix Lifetime: This defines the duration (in seconds) that the requesting
node is allowed to use the advertised prefix. It is analogous to DHCP lease
time in an IPv4 network.
Figure 6: IPv6 Adve rtise me nt Pre fix se ttings
2.2 VLAN Configuration
The router supports virtual network isolation on the LAN with the use of VLANs.
LAN devices can be configured to communicate in a sub network defined by VLAN
identifiers. LAN ports can be assigned unique VLAN IDs so that traffic to and from
that physical port can be isolated from the general LAN. VLAN filtering is
particularly useful to limit broadcast packets of a device in a large network
VLAN support is disabled by default in the router. In the VLAN Configuration page,
enable VLAN support on the router and then proceed to the next section to define the
virtual network.
Setup > VLAN Settings > Available VLAN
The Available VLAN page shows a list of configured VLANs by name and VLAN ID.
A VLAN membership can be created by clicking the Add button below the List of
Available VLANs .
A VLAN membership entry consists of a VLAN identifier and the numerical VLAN
ID which is assigned to the VLAN membership . The VLAN ID value can be any

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