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Chapter 5 Broadband
VMG8324-B10A / VMG8324-B30A Series User’s Guide
46
•
Any number of consecutive blocks of zeros can be replaced by a double colon. A double
colon can only appear once in an IPv6 address. So
2001:0db8:0000:0000:1a2f:0000:0000:0015
can be written as
2001:0db8::1a2f:0000:0000:0015
,
2001:0db8:0000:0000:1a2f::0015
,
2001:db8::1a2f:0:0:15
or
2001:db8:0:0:1a2f::15
.
IPv6 Prefix and Prefix Length
Similar to an IPv4 subnet mask, IPv6 uses an address prefix to represent the network address. An
IPv6 prefix length specifies how many most significant bits (start from the left) in the address
compose the network address. The prefix length is written as “/x” where x is a number. For
example,
2001:db8:1a2b:15::1a2f:0/32
means that the first 32 bits (
2001:db8
) is the subnet prefix.
IPv6 Subnet Masking
Both an IPv6 address and IPv6 subnet mask compose of 128-bit binary digits, which are divided
into eight 16-bit blocks and written in hexadecimal notation. Hexadecimal uses four bits for each
character (1 ~ 10, A ~ F). Each block’s 16 bits are then represented by four hexadecimal
characters. For example, FFFF:FFFF:FFFF:FFFF:FC00:0000:0000:0000.
IPv6 Rapid Deployment
Use IPv6 Rapid Deployment (6rd) when the local network uses IPv6 and the ISP has an IPv4
network. When the Device has an IPv4 WAN address and you set
IPv6/IPv4 Mode
to
IPv4 Only
,
you can enable 6rd to encapsulate IPv6 packets in IPv4 packets to cross the ISP’s IPv4 network.
The Device generates a global IPv6 prefix from its IPv4 WAN address and tunnels IPv6 traffic to the
ISP’s Border Relay router (BR in the figure) to connect to the native IPv6 Internet. The local
network can also use IPv4 services. The Device uses it’s configured IPv4 WAN IP to route IPv4
traffic to the IPv4 Internet.
Figure 20
IPv6 Rapid Deployment
ISP (IPv4)
IPv6 Internet
IPv4
IPv6
BR
IPv6 in IPv4
IPv4 Internet
IPv4
+
LAN
- IPv6
- IPv4
WAN
- IPv4
- IPv6 in IPv4
Page 47 / 404
Chapter 5 Broadband
VMG8324-B10A / VMG8324-B30A Series User’s Guide
47
Dual Stack Lite
Use Dual Stack Lite when local network computers use IPv4 and the ISP has an IPv6 network.
When the Device has an IPv6 WAN address and you set
IPv6/IPv4 Mode
to
IPv6 Only
, you can
enable Dual Stack Lite to use IPv4 computers and services.
The Device tunnels IPv4 packets inside IPv6 encapsulation packets to the ISP’s Address Family
Transition Router (AFTR in the graphic) to connect to the IPv4 Internet. The local network can also
use IPv6 services. The Device uses it’s configured IPv6 WAN IP to route IPv6 traffic to the IPv6
Internet.
Figure 21
Dual Stack Lite
5.1.3
Before You Begin
You need to know your Internet access settings such as encapsulation and WAN IP address. Get this
information from your ISP.
5.2
The Broadband Screen
Use this screen to change your Device’s Internet access settings. Click
Network Setting >
Broadband
from the menu. The summary table shows you the configured WAN services
(connections) on the Device.
Figure 22
Network Setting > Broadband
ISP (IPv6)
IPv6 Internet
IPv6
AFTR
IPv4 in IPv6
IPv4 Internet
IPv6
IPv4
+
LAN
- IPv6
- IPv4
WAN
- IPv6
- IPv4 in IPv6
Page 48 / 404
Chapter 5 Broadband
VMG8324-B10A / VMG8324-B30A Series User’s Guide
48
The following table describes the labels in this screen.
Table 6
Network Setting > Broadband
LABEL
DESCRIPTION
Add New WAN
Interface
Click this button to create a new connection.
#
This is the index number of the entry.
Name
This is the service name of the connection.
Type
This shows whether it is an ATM, Ethernet or a PTM connection.
Mode
This shows whether the connection is in routing or bridge mode.
Encapsulation
This is the method of encapsulation used by this connection.
802.1p
This indicates the 802.1p priority level assigned to traffic sent through this connection. This
displays
N/A
when there is no priority level assigned.
802.1q
This indicates the VLAN ID number assigned to traffic sent through this connection. This
displays
N/A
when there is no VLAN ID number assigned.
IGMP Proxy
This shows whether the Device act as an IGMP proxy on this connection.
NAT
This shows whether NAT is activated or not for this connection.
Default
Gateway
This shows whether the Device use the WAN interface of this connection as the system
default gateway.
IPv6
This shows whether IPv6 is activated or not for this connection. IPv6 is not available when
the connection uses the bridging service.
MLD Proxy
This shows whether Multicast Listener Discovery (MLD) is activated or not for this
connection. MLD is not available when the connection uses the bridging service.
Modify
Click the
Edit
icon to configure the WAN connection.
Click the
Delete
icon to remove the WAN connection.
Page 49 / 404
Chapter 5 Broadband
VMG8324-B10A / VMG8324-B30A Series User’s Guide
49
5.2.1
Add/Edit Internet Connection
Click
Add New WAN Interface
in the
Broadband
screen or the
Edit
icon next to an existing WAN
interface to configure a WAN connection. The screen varies depending on the interface type, mode,
encapsulation, and IPv6/IPv4 mode you select.
5.2.1.1
Routing Mode
Use
Routing
mode if your ISP give you one IP address only and you want multiple computers to
share an Internet account.
The following example screen displays when you select the
ADSL/VDSL over ATM
connection
type,
Routing
mode, and
PPPoE
encapsulation. The screen varies when you select other interface
type, encapsulation, and IPv6/IPv4 mode.
Figure 23
Network Setting > Broadband > Add New WAN Interface/Edit (Routing Mode)
The following table describes the labels in this screen.
Table 7
Network Setting > Broadband > Add New WAN Interface/Edit (Routing Mode)
LABEL
DESCRIPTION
General
Active
Select this to activate the WAN configuration settings.
Name
Specify a descriptive name for this connection.
Type
Select whether it is an ADSL/VDSL over PTM, ADSL over ATM connection or Ethernet.
Page 50 / 404
Chapter 5 Broadband
VMG8324-B10A / VMG8324-B30A Series User’s Guide
50
Mode
Select
Routing
if your ISP give you one IP address only and you want multiple computers to
share an Internet account.
Encapsulation
Select the method of encapsulation used by your ISP from the drop-down list box. This
option is available only when you select
Routing
in the
Mode
field.
The choices depend on the connection type you selected. If your connection type is
ADSL/
VDSL over PTM
, the choices are
PPPoE
and
IPoE
. If your connection type is
ADSL over
ATM
, the choices are
PPPoE
,
PPPoA
,
IPoE
and
IPoA
.
IPv6/IPv4 Mode
Select
IPv4 Only
if you want the Device to run IPv4 only.
Select
IPv6/IPv4 DualStack
to allow the Device to run IPv4 and IPv6 at the same time.
Select
IPv6 Only
if you want the Device to run IPv6 only.
ATM PVC Configuration (These fields appear when the
Type
is set to
ADSL over ATM
.)
VPI
The valid range for the VPI is 0 to 255. Enter the VPI assigned to you.
VCI
The valid range for the VCI is 32 to 65535 (0 to 31 is reserved for local management of ATM
traffic). Enter the VCI assigned to you.
DSL Link Type
This field is not editable. The selection depends on the setting in the
Encapsulation
field.
EoA
(Ethernet over ATM) uses an Ethernet header in the packet, so that you can have
multiple services/connections over one PVC. You can set each connection to have its own
MAC address or all connections share one MAC address but use different VLAN IDs for
different services. EoA supports ENET ENCAP (IPoE), PPPoE and RFC1483/2684 bridging
encapsulation methods.
PPPoA
(PPP over ATM) allows just one PPPoA connection over a PVC.
IPoA
(IP over ATM) allows just one RFC 1483 routing connection over a PVC.
Encapsulation
Mode
Select the method of multiplexing used by your ISP from the drop-down list box. Choices
are:
•
LLC/SNAP-BRIDGING:
In LCC encapsulation, bridged PDUs are encapsulated by
identifying the type of the bridged media in the SNAP header. This is available only when
you select
IPoE
or
PPPoE
in the
Select DSL Link Type
field.
•
VC/MUX:
In VC multiplexing, each protocol is carried on a single ATM virtual circuit
(VC). To transport multiple protocols, the Device needs separate VCs. There is a binding
between a VC and the type of the network protocol carried on the VC. This reduces
payload overhead since there is no need to carry protocol information in each Protocol
Data Unit (PDU) payload.
•
LLC/ENCAPSULATION:
More than one protocol can be carried over the same VC. This
is available only when you select
PPPoA
in the
Encapsulation
field.
•
LLC/SNAP-ROUTING:
In LCC encapsulation, an IEEE 802.2 Logical Link Control (LLC)
header is prefixed to each routed PDU to identify the PDUs. The LCC header can be
followed by an IEEE 802.1a SubNetwork Attachment Point (SNAP) header. This is
available only when you select
IPoA
in the
Encapsulation
field.
Service
Category
Select
UBR Without PCR
or
UBR With PCR
for applications that are non-time sensitive,
such as e-mail.
Select
CBR
(Continuous Bit Rate) to specify fixed (always-on) bandwidth for voice or data
traffic.
Select
Non Realtime VBR
(non real-time Variable Bit Rate) for connections that do not
require closely controlled delay and delay variation.
Select
Realtime VBR
(real-time Variable Bit Rate) for applications with bursty connections
that require closely controlled delay and delay variation.
Peak Cell Rate
Divide the DSL line rate (bps) by 424 (the size of an ATM cell) to find the Peak Cell Rate
(PCR). This is the maximum rate at which the sender can send cells. Type the PCR here.This
field is not available when you select
UBR Without PCR
.
Table 7
Network Setting > Broadband > Add New WAN Interface/Edit (Routing Mode) (continued)
LABEL
DESCRIPTION

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