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Page 76 / 382 Scroll up to view Page 71 - 75
Chapter 5 WAN Setup
P-870HN-51b User’s Guide
76
Note: The ATM and PTM layer-2 interfaces cannot work at the same time.
Figure 29
Layer 2 Interface: PTM
Figure 30
Layer 2 Interface: ATM
The following table describes the fields in this screen.
Table 11
Layer 2 Interface
LABEL
DESCRIPTION
Interface
Select an interface for which you want to configure here.
PTM
: The Device uses the VDSL technology for data transmission over
the DSL port.
ATM
: The Device uses the ADSL technology for data transmission over
the DSL port.
Interface
This is the name of the interface.
Vpi
This is the Virtual Path Identifier (VPI).
Vci
This is the Virtual Channel Identifier (VCI).
Category
This is the ATM traffic class.
Link Type
This is the DSL link type of the ATM layer-2 interface.
Connection Mode
This shows the connection mode of the layer-2 interface.
QoS
This shows whether QoS (Quality of Service) is enabled on the Device.
Page 77 / 382
Chapter 5 WAN Setup
P-870HN-51b User’s Guide
77
5.5.1
Layer 2 Interface Configuration
Click the
Add
button in the
Layer 2 Interface
screen to open the following
screen. Use this screen to create a new layer-2 interface. At the time of writing,
you can configure only one PTM interface on the Device. You can have multiple
ATM layer-2 interfaces using different VPI and/or VCI values. The screen varies
depending on the interface type you select.
Figure 31
DSL ATM Interface Configuration
Remove
Click the
Remove
button to delete this interface from the Device. A
window displays asking you to confirm that you want to delete the
interface.
You cannot remove the layer-2 interface when a WAN service is
associated with it.
AnnexM Enabled
This option is available for an ATM (ADSL) interface. Select this to use
double upstream mode to increase the maximum upstream transfer
rate.
Add
Click this button to create a new layer-2 interface.
Apply
This button is available for an ATM (ADSL) interface. Click
Apply
to
save your changes back to the Device.
Table 11
Layer 2 Interface (continued)
LABEL
DESCRIPTION
Page 78 / 382
Chapter 5 WAN Setup
P-870HN-51b User’s Guide
78
Figure 32
DSL PTM Interface Configuration
The following table describes the fields in this screen.
Table 12
DSL PTM Interface Configuration
LABEL
DESCRIPTION
ATM PVC
Configuration
VPI (Virtual Path Identifier) and VCI (Virtual Channel Identifier) define
a virtual circuit. This section is available only when you configure an
ATM layer-2 interface.
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.
Select DSL Link
Type
Select
EoA
(Ethernet over ATM) to have 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.
Select
PPPoA
(PPP over ATM) to allow just one PPPoA connection over
a PVC.
Select
IPoA
(IP over ATM) to allow 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. Choices are:
•
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/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
EoA
in the
Select DSL Link Type
field.
•
LLC/ENCAPSULATION
: More than one protocol can be carried
over the same VC. This is available only when you select
PPPoA
in
the
Select DSL Link Type
field.
•
LLC/SNAP-ROUTING
: 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
EoA
in the
Select DSL Link Type
field.
Page 79 / 382
Chapter 5 WAN Setup
P-870HN-51b User’s Guide
79
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
Realtime VBR
(real-time Variable Bit Rate) for applications
with bursty connections that require closely controlled delay and delay
variation.
Select
Non Realtime VBR
(non real-time Variable Bit Rate) for
connections that do not 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
.
Sustainable
Cell Rate
The Sustain Cell Rate (SCR) sets the average cell rate (long-term) that
can be transmitted. Type the SCR, which must be less than the PCR.
Note that system default is 0 cells/sec.
This field is available only when you select
Non Realtime VBR
or
Realtime VBR
.
Maximum
Burst Size
Maximum Burst Size (MBS) refers to the maximum number of cells
that can be sent at the peak rate. Type the MBS, which is less than
65535.
This field is available only when you select
Non Realtime VBR
or
Realtime VBR
.
Select
Connection Mode
Select
Default Mode
to allow only one WAN service over a single
virtual circuit.
Select
VLAN MUX Mode
to allow multiplexing of multiple protocols
over a single virtual circuit. You need to assign a VLAN ID and priority
level to traffic through each WAN connection. All WAN connections
share one MAC address.
This field is not available if you select
PPPoA
or
IPoA
as the DSL link
type. The Device uses
Default Mode
automatically for
PPPoA
or
IPoA
.
Back
Click this button to return to the previous screen without saving any
changes.
Apply/Save
Click this button to save your changes and go back to the previous
screen.
Table 12
DSL PTM Interface Configuration (continued)
LABEL
DESCRIPTION
Page 80 / 382
Chapter 5 WAN Setup
P-870HN-51b User’s Guide
80
5.6
The Internet Connection Screen
Use this screen to change your Device’s WAN settings. Click
Network > WAN >
Internet Connection
. The summary table shows you the configured WAN
services (connections) on the Device.
To use NAT, firewall or IGMP proxy in the Device, you need to configure a WAN
connection with PPPoE or IPoE.
Note: When a layer-2 interface is in
VLAN MUX Mode
, you can configure up to eight
WAN services for each interface.
Figure 33
Internet Connection
The following table describes the labels in this screen.
Table 13
Internet Connection
LABEL
DESCRIPTION
Interface
This shows the name of the interface used by this connection.
A default name
ipoa*
,
pppoa*
,
atm*
or
ptm*
indicates DSL port.
The
pppx
name
(where x starts from 0 and is the index number of
PPP connection on the Device) indicates a PPP connection via any one
of the WAN interface.
The number after the dot (
.
) represents the VLAN ID number assigned
to traffic sent through this connection. The number after the
underscore (
_
) represents the index number of connections through
the same interface.
(null)
means the entry is not valid.
Description
This is the service name of this connection.
0
and
35
or
0
and
1
are the default VPI and VCI numbers. The last
number represents the index number of connections over the same
PVC or the VLAN ID number assigned to traffic sent through this
connection.
(null)
means the entry is not valid.
Type
This shows the method of encapsulation used by this connection.

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