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Page 86 / 331 Scroll up to view Page 81 - 85
Chapter 6 Broadband
VMG1312-B Series User’s Guide
86
6.5
The 802.1x Screen
You can view and configure the 802.1X authentication settings in the
802.1x
screen. Click
Network Setting
>
Broadband
>
802.1x
to display the following screen.
Figure 27
Network Setting > Broadband > 802.1x
The following table describes the labels in this screen.
Table 13
Network Setting > Network Setting > 802.1x
LABEL
DESCRIPTION
#
This is the index number of the entry.
Status
This field displays whether the authentication is active or not. A yellow bulb signifies that
this authentication is active. A gray bulb signifies that this authentication is not active.
Interface
This is the interface that uses the authentication. This displays
N/A
when there is no
interface assigned.
EAP Identity
This shows the EAP identity of the authentication. This displays
N/A
when there is no EAP
identity assigned.
EAP method
This shows the EAP method used in the authentication. This displays
N/A
when there is no
EAP method assigned.
Bidirectional
Authentication
This shows whether bidirectional authentication is allowed.
Certificate
This shows the certificate used for this authentication. This displays
N/A
when there is no
certificate assigned.
Trusted CA
This shows the Trusted CA used for this authentication. This displays
N/A
when there is no
Trusted CA assigned.
Modify
Click this icon to edit an item.
Apply
Click
Apply
to save your changes back to the Device.
Cancel
Click
Cancel
to return to the previous configuration.
Page 87 / 331
Chapter 6 Broadband
VMG1312-B Series User’s Guide
87
6.5.1
Modify 802.1X Settings
Use this screen to edit 802.1X authentication settings. Click the
Edit
icon next to the rule you want
to edit. The screen shown next appears.
Figure 28
Network Setting
>
Broadband > 802.1x > Modify
The following table describes the labels in this screen.
6.6
The Ethernet WAN Screen
Use the
Ethernet WAN
screen to convert LAN port number four as a WAN port and to restore it
back from a WAN to a LAN port for Ethernet Internet access.
Table 14
Network Setting
>
Broadband > 802.1x: Edit
LABEL
DESCRIPTION
Active
This field allows you to activate/deactivate the authentication.
Select this to enable the authentication. Clear this to disable this authentication without
having to delete the entry.
Interface
Select an interface to which the authentication applies.
EAP Identity
Enter the EAP identity of the authentication.
EAP method
This is the EAP method used for this authentication.
Enable
Bidirectional
Authentication
Select this to allow bidirectional authentication.
Certificate
Select the certificate you want to assign to the authentication. You need to import the
certificate in the
Security
>
Certificates
>
Local Certificates
screen.
Trusted CA
Select the Trusted CA you want to assign to the authentication. You need to import the
certificate in the
Security
>
Certificates
>
Trusted CA
screen.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
Page 88 / 331
Chapter 6 Broadband
VMG1312-B Series User’s Guide
88
It’s not enough to just enable LAN 4 as a WAN connection here. You must also go to
Network
Setting > Broadband > Add New WAN Interface
screen and create a new interface for it with
the
Type
as
Ethernet
and
Encapsulation
as
IPoE
, and it’s advisable to enable
NAT
.
You cannot have DSL Ethernet and 3G WAN connections working at the same time. The order of
priority for the WAN connections are:
1
DSL
2
Ethernet
3
3G
Click
Network Setting
>
Broadband
>
Ethernet WAN
to display the following screen.
Figure 29
Network Setting > Broadband > Ethernet WAN
The following table describes the labels in this screen.
6.7
Technical Reference
The following section contains additional technical information about the Device features described
in this chapter.
Encapsulation
Be sure to use the encapsulation method required by your ISP. The Device can work in bridge mode
or routing mode. When the Device is in routing mode, it supports the following methods.
Table 15
Network Setting > Broadband > Ethernet WAN
LABEL
DESCRIPTION
Enable
Select
Enable
to convert LAN port number four to a WAN port.
Disable
Select
Disable
to restore LAN port number four to a LAN port.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
Page 89 / 331
Chapter 6 Broadband
VMG1312-B Series User’s Guide
89
IP over Ethernet
IP over Ethernet (IPoE) is an alternative to PPPoE. IP packets are being delivered across an
Ethernet network, without using PPP encapsulation. They are routed between the Ethernet interface
and the WAN interface and then formatted so that they can be understood in a bridged
environment. For instance, it encapsulates routed Ethernet frames into bridged Ethernet cells.
PPP over ATM (PPPoA)
PPPoA stands for Point to Point Protocol over ATM Adaptation Layer 5 (AAL5). A PPPoA connection
functions like a dial-up Internet connection. The Device encapsulates the PPP session based on
RFC1483 and sends it through an ATM PVC (Permanent Virtual Circuit) to the Internet Service
Provider’s (ISP) DSLAM (digital access multiplexer). Please refer to RFC 2364 for more information
on PPPoA. Refer to RFC 1661 for more information on PPP.
PPP over Ethernet (PPPoE)
Point-to-Point Protocol over Ethernet (PPPoE) provides access control and billing functionality in a
manner similar to dial-up services using PPP. PPPoE is an IETF standard (RFC 2516) specifying how
a personal computer (PC) interacts with a broadband modem (DSL, cable, wireless, etc.)
connection.
For the service provider, PPPoE offers an access and authentication method that works with existing
access control systems (for example RADIUS).
One of the benefits of PPPoE is the ability to let you access one of multiple network services, a
function known as dynamic service selection. This enables the service provider to easily create and
offer new IP services for individuals.
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no
specific configuration of the broadband modem at the customer site.
By implementing PPPoE directly on the Device (rather than individual computers), the computers on
the LAN do not need PPPoE software installed, since the Device does that part of the task.
Furthermore, with NAT, all of the LANs’ computers will have access.
RFC 1483
RFC 1483 describes two methods for Multiprotocol Encapsulation over ATM Adaptation Layer 5
(AAL5). The first method allows multiplexing of multiple protocols over a single ATM virtual circuit
(LLC-based multiplexing) and the second method assumes that each protocol is carried over a
separate ATM virtual circuit (VC-based multiplexing). Please refer to RFC 1483 for more detailed
information.
Multiplexing
There are two conventions to identify what protocols the virtual circuit (VC) is carrying. Be sure to
use the multiplexing method required by your ISP.
VC-based Multiplexing
Page 90 / 331
Chapter 6 Broadband
VMG1312-B Series User’s Guide
90
In this case, by prior mutual agreement, each protocol is assigned to a specific virtual circuit; for
example, VC1 carries IP, etc. VC-based multiplexing may be dominant in environments where
dynamic creation of large numbers of ATM VCs is fast and economical.
LLC-based Multiplexing
In this case one VC carries multiple protocols with protocol identifying information being contained
in each packet header. Despite the extra bandwidth and processing overhead, this method may be
advantageous if it is not practical to have a separate VC for each carried protocol, for example, if
charging heavily depends on the number of simultaneous VCs.
Traffic Shaping
Traffic Shaping is an agreement between the carrier and the subscriber to regulate the average rate
and fluctuations of data transmission over an ATM network. This agreement helps eliminate
congestion, which is important for transmission of real time data such as audio and video
connections.
Peak Cell Rate (PCR) is the maximum rate at which the sender can send cells. This parameter may
be lower (but not higher) than the maximum line speed. 1 ATM cell is 53 bytes (424 bits), so a
maximum speed of 832Kbps gives a maximum PCR of 1962 cells/sec. This rate is not guaranteed
because it is dependent on the line speed.
Sustained Cell Rate (SCR) is the mean cell rate of each bursty traffic source. It specifies the
maximum average rate at which cells can be sent over the virtual connection. SCR may not be
greater than the PCR.
Maximum Burst Size (MBS) is the maximum number of cells that can be sent at the PCR. After MBS
is reached, cell rates fall below SCR until cell rate averages to the SCR again. At this time, more
cells (up to the MBS) can be sent at the PCR again.
If the PCR, SCR or MBS is set to the default of "0", the system will assign a maximum value that
correlates to your upstream line rate.
The following figure illustrates the relationship between PCR, SCR and MBS.
Figure 30
Example of Traffic Shaping

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