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Page 86 / 182 Scroll up to view Page 81 - 85
84
C
HAPTER
5: C
ONFIGURING
THE
R
OUTER
Routing Mode over ATM
RFC1483/2684 routed encapsulation in routing mode, it carries IP
datagrams directly over ATM. DHCP client function can also be enabled
to obtain an IP address dynamically.
Figure 64
Routing Mode over ATM Screen
1
Select
Routing mode over ATM
from the
protocol
drop-down menu.
2
Enter IP address, Subnet mask, and Default gateway information.
3
If your ISP provides DNS information, check the
DNS Automatic from ISP
box.
4
If the ISP requires you to input a Host Name, enter it in the
Host Name
field.
5
If your ISP uses DHCP to automatically assign IP addresses, check the
DHCP Client
checkbox.
6
Check the
Add Default Route
checkbox to set this PVC as the default
route, this is used when you configure more than one PVC for the Router.
7
Enter the VPI/VCI values. Or click
Auto Search
to find out the values.
8
Select the Encapsulation,
VC MUX
or
LLC
. This information should be
provided by your ISP.
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Page 87 / 182
Internet Settings
85
9
QoS Class: select
CBR
,
UBR
or
VBR
.
■
CBR (constant bit rate): the CBR service class is intended for
real-time applications, for example, those requiring tightly
constrained delay and delay variation, such as voice and video
applications. The consistent availability of a fixed quantity of
bandwidth is considered appropriate for CBR service.
■
VBR (variable bit rate): QoS class defined by the ATM Forum for
ATM networks. VBR is subdivided into a real time (RT) class and
non-real time (NRT) class. VBR (RT) is used for connections in which
there is a fixed timing relationship between samples. VBR (NRT) is
used for connections in which there is no fixed timing relationship
between samples, but that still need a guaranteed QoS. Compare
with ABR, CBR, and UBR.
■
UBR (unspecified bit rate): the UBR service class is intended for
delay-tolerant or non-real-time applications, for example, those
which do not require tightly constrained delay and delay variation,
such as traditional computer communications applications. The
UBR service may be considered as “best effort service”.
10
PCR/SCR/MBS: PCR (Peak Cell Rate), SCR (Sustainable Cell Rate) and MBS
(Maximum Burst Size) are configurable.
11
Click
Apply
.
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Page 88 / 182
86
C
HAPTER
5: C
ONFIGURING
THE
R
OUTER
Dynamic/Fixed IP in 1483 Bridge Mode
Dynamic/Fixed IP in 1483 Bridge Mode uses the same encapsulation as
1483 Bridging but with bridging function disabled. DHCP client function
can also be enabled to obtain an IP address dynamically.
Figure 65
Dynamic/Fixed IP in 1483 Bridge Mode Screen
1
Select
Dynamic/Fixed IP in 1483 Bridge Mode
from the
protocol
drop-down
menu.
2
Enter your IP address, subnet mask, and default gateway information.
3
IPoEoA NAT IP - enter the IP address in this field.
IPoE over AAL5 (IPoEoA) adopts a three-layer architecture, with IP
encapsulation at the uppermost layer, IP over Ethernet (IPoE) in the
middle, and IPoEoA at the bottom. When a device is connected to a
remote access server at high speed to access an external network, PVC
over ATM is used because of the long distance. In this case, it is required
for the ATM port of the server to carry Ethernet packets, which is known
as IPoEoA. In the application of IPoEoA, one virtual Ethernet (VE) interface
can be associated with multiple PVCs. PVCs associated with the same VE
interface are interconnected at layer 2.
4
If your ISP provides DNS information, check the
DNS Automatic from ISP
box.
5
If the ISP requires you to input a Host Name, enter it in the
Host Name
field.
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Page 89 / 182
Internet Settings
87
6
If your ISP uses DHCP to automatically assign IP addresses, check the
DHCP Client
checkbox.
7
Check the
Add Default Route
checkbox to set this PVC as the default
route, this is used when you configure more than one PVC for the Router.
8
Enter the VPI/VCI values. Or you can click
Auto Search
to automatically
find out this information.
9
Select the Encapsulation,
VC MUX
or
LLC
. This information should be
provided to you by your ISP.
10
QoS Class: select
CBR
,
UBR
or
VBR
.
■
CBR (constant bit rate): the CBR service class is intended for
real-time applications, for example, those requiring tightly
constrained delay and delay variation, such as voice and video
applications. The consistent availability of a fixed quantity of
bandwidth is considered appropriate for CBR service.
■
VBR (variable bit rate): QoS class defined by the ATM Forum for
ATM networks. VBR is subdivided into a real time (RT) class and
non-real time (NRT) class. VBR (RT) is used for connections in which
there is a fixed timing relationship between samples. VBR (NRT) is
used for connections in which there is no fixed timing relationship
between samples, but that still need a guaranteed QoS. Compare
with ABR, CBR, and UBR.
■
UBR (unspecified bit rate): the UBR service class is intended for
delay-tolerant or non-real-time applications, for example, those
which do not require tightly constrained delay and delay variation,
such as traditional computer communications applications. The
UBR service may be considered as “best effort service”.
11
PCR/SCR/MBS: PCR (Peak Cell Rate), SCR (Sustainable Cell Rate) and MBS
(Maximum Burst Size) are configurable.
12
Click
Apply
.
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Page 90 / 182
88
C
HAPTER
5: C
ONFIGURING
THE
R
OUTER
DNS
Domain Name Service (or Server) is an Internet service that translates
domain names into IP addresses. Because domain names are alphabetic,
they're easier to remember. The Internet however, is really based on IP
addresses. Every time you use a domain name, a DNS service must
translate the name into the corresponding IP address. For example, the
domain name www.example.com might translate to 198.105.232.14.
Figure 66
DNS Screen
If the DNS information is automatically provided by your ISP every time
you connect to it, check the
Automatic from ISP
checkbox (this is the
default setting).
If your ISP provided you with specific DNS addresses to use, enter them
into the appropriate fields on the screen and click
Apply
.
Many ISPs do not require you to enter this information into the Router. If
you are using a static IP connection type, you may need to enter a specific
DNS address and secondary DNS address for your connection to work
properly. If your connection type is dynamic or PPPoE, it is likely that you
do not have to enter a DNS address.
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