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Page 56 / 300 Scroll up to view Page 51 - 55
Chapter 5 WAN Setup
P-663HN-51 User’s Guide
56
See
Section 5.1 on page 53
for more information.
Figure 22
Advanced Setup > WAN
The following table describes the labels in this screen.
Table 12
Advanced Setup > WAN
LABEL
DESCRIPTION
Port/VPI/VCI
This field displays the WAN connection’s DSL port, Virtual Path
Identifier, and Virtual Channel Identifier. The DSL port is always 0
because the DSL ports are bonded into a single logical port.
VLAN Mux.
This field shows whether or not VLAN multiplexing is enabled. VLAN
multiplexing allows multiple separate WAN connections within the
same PVC.
Con. ID
This is the number of the WAN connection.
Category
This is the ATM traffic class the WAN connection is using.
Service
This displays the connection type, DSL port, Virtual Path Identifier,
and Virtual Channel Identifier. For the connection types, pppoe stands
for PPPoE, ipoa stands for IPoA, pppoa stands for PPPoA, mer stands
for MAC Encapsulated Routing, and br stands for bridging.
Interface
This field displays the name of the WAN connection, followed by the
DSL port, Virtual Path Identifier, and Virtual Channel Identifier.
Protocol
This is the type of network protocol the WAN interface is using for IP
over Ethernet.
IGMP
This is whether or not the WAN connection is using IGMP multicast (if
available).
QoS
This is whether or not packet level QoS is enabled for the WAN
connection.
State
This is whether or the WAN connection is enabled.
Remove
To remove a WAN connection, select its
Remove
check box and click
the
Remove
button.
Edit
Click this button to go to a screen where you can modify the WAN
connections settings.
Add
Click this button to go to a screen where you can configure settings
for a new WAN connection.
Remove
To remove a WAN connection, select its
Remove
check box and click
the
Remove
button.
Save/Reboot
Click this button to apply and save your changes. The ZyXEL Device
restarts.
Page 57 / 300
Chapter 5 WAN Setup
P-663HN-51 User’s Guide
57
5.4
WAN ATM PVC Configuration and QoS
Click
Advanced Setup > WAN > Add
(or
Edit
) to open the following screen. Use
this screen to configure ATM PVC settings and enable or disable QoS. The screen
differs by the service category.
See
Section 5.1 on page 53
for more information.
Figure 23
Advanced Setup > WAN > Add
The following table describes the labels in this screen.
Table 13
Advanced Setup > WAN > Add
LABEL
DESCRIPTION
ATM PVC
Configuration
The PORT (interface), VPI (Virtual Path Identifier) and VCI (Virtual
Channel Identifier) define an ATM PVC (Permanent Virtual Circuit).
Refer to the appendix for more information.
VPI
Enter the VPI assigned to you for this WAN connection.
VCI
Enter the VCI assigned to you for this WAN connection.
VLAN Mux.
Select the check box to use VLAN multiplexing to allow multiple
separate protocols to use the same PVC. Selecting this enables IEEE
802.1q. Separate VLANs can be used to give different priorities to the
traffic from different ports.
802.1Q VLAN ID
When you enable VLAN multiplexing, type the VLAN ID that the ZyXEL
Device is to add to the traffic sent through this WAN connection.
Page 58 / 300
Chapter 5 WAN Setup
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58
5.5
Connection Types
Be sure to use the connection type required by your ISP. Here is background
information on the connection types the ZyXEL Device supports.
5.5.1
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 ZyXEL 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.
Service Category
Select
UBR
(unspecified bit rate) for applications that are non-time
sensitive, such as e-mail. Use it with PCR if you want to specify a
maximum rate at which the sender can send cells.
Select
CBR
(constant bit rate) to specify fixed (always-on) bandwidth
for voice or data traffic.
Select
Realtime
VBR
for bursty traffic connections that require
closely controlled delay and delay variation (like video conferencing).
Use
Non Realtime
VBR
for bursty connections that do not require
closely controlled delay and delay variation (like non-time sensitive
data file transfers).
Peak Cell Rate
The Peak Cell Rate (PCR) is the maximum rate at which the sender
can send cells. PCR applies with all of the ATM traffic classes. Type a
number of (ATM) cells per second (1~255000).
Sustainable
Cell Rate
The Sustained Cell Rate (SCR) sets the average cell rate (long-term)
that can be transmitted. Type the SCR, which must be less than the
PCR. SCR applies with the
VBR
traffic classes. Type a number of
(ATM) cells per second. The SCR must be less than the PCR.
Maximum
Burst Size
The Maximum Burst Size (MBS) sets the maximum number of cells
that the port should handle without any discards. Type the MBS here
(1~1000000). MBS applies with the
VBR
traffic classes.
Enable Quality of
Service
Enable the (packet level) QoS if you need to provide improved
performance for certain classes of applications (like VoIP or video
conferencing).
Back
Click this to return to the previous screen.
Next
Click this to go to the following screen.
Table 13
Advanced Setup > WAN > Add (continued)
LABEL
DESCRIPTION
Page 59 / 300
Chapter 5 WAN Setup
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59
5.5.2
PPPoE
PPPoE (Point to Point Protocol over Ethernet) provides access control and billing
functionality in a manner similar to dial-up services using PPP. The ZyXEL Device
bridges a PPP session over Ethernet (PPP over Ethernet, RFC 2516) from your
computer to an ATM PVC (Permanent Virtual Circuit) which connects to ADSL
Access Concentrator where the PPP session terminates. One PVC can support any
number of PPP sessions from your LAN. For more information on PPPoE, see the
appendices.
5.5.3
MER
MER (MAC Encapsulated Routing) is only implemented with the IP network
protocol. IP packets 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
ATM cells.
5.5.4
IPoA
IPoA (Internet Protocol over ATM) in 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 the
RFC for more detailed information.
5.5.5
Bridging
With bridging the ZyXEL Device has a static IP address for the connection. The
ZyXEL Device passes traffic through to another device (a computer or router for
example) that handles authenticating with the ISP.
5.6
Encapsulation
There are two conventions to identify what protocols the virtual circuit (VC) is
carrying. Be sure to use the encapsulation method required by your ISP.
Page 60 / 300
Chapter 5 WAN Setup
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60
5.6.1
LLC-based Encapsulation
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.
5.6.2
VC-based Encapsulation
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.
5.7
WAN Connection Type and Encapsulation
Mode
This is the second WAN setup add (or edit) screen. Use this screen to configure
WAN connection type and encapsulation mode.
Figure 24
Advanced Setup > WAN > Add (2)

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