71

Configure

☛

Note:

The difference between VBR-rt and VBR-nrt is the tolerated Cell Delay Varia-

tion range and the provisioned Maximum Burst Size.

Class

PCR

SCR

MBS

Transmit Priority

Comments

UBR

X

N/A

N/A

Low

PCR is a cap

CBR

X

N/A

N/A

High

PCR is a guaranteed rate

VBR

X

X

X

High

PCR > SCR.

SCR is a guaranteed rate.

PCR is a cap.

72

Selected Advanced options are discussed in the pages that follow. Many are self-explana-

tory or are dictated by your service provider.

The following are links under Configure -> Advanced:

73

Configure

A static route identifies a manually configured pathway to a remote network. Unlike

dynamic routes, which are acquired and confirmed periodically from other routers, static

routes do not time out. Consequently, static routes are useful when working with PPP,

since an intermittent PPP link may make maintenance of dynamic routes problematic.

When you click the

link, the

IP Static Routes

page appears.

You can configure as many as 32 static IP routes for the Gateway. To add a static route,

click the

button.

The

IP Static Route Entry

page appears.

•

Destination Network

: Enter the IP address of the static route. It may not be 0.0.0.0.

•

Netmask

: Enter the subnet mask for the IP network at the other end of the static route.

The subnet mask associated with the destination network must represent the same

network class (A, B, or C) or a lower class (such as a class C subnet mask or class B

network number) to be valid.

74

•

Interface Type

: Choose

PPP (vcc1)

– depending on the interface; typically vcc1 for

DSL – or

IP Address

from the pull-down menu to specify whether the static route is

accessible through PPP or IP address.

•

Gateway

: Enter the IP address of the gateway for the static route. The default gateway

must be located on a network connected to your Netopia Gateway configured interface.

•

Metric

: Specifies the hop count for the static route. Enter a number from 1 to 15 to indi-

cate the number of routes (actual or best guess) a packet must traverse to reach the

remote network. Some metric or a value of 1 will be used to indicate:

• The remote network is one router away and the static route is the best way to

reach it.

• The remote network is more than one router away but the static route should not

be replaced by a dynamic route, even if the dynamic route is more efficient.

•

RIP Advertise

: From the pull-down menu, choose how the static route should be adver-

tised via RIP:

•

Split Horizon

: Do not advertise route if the gateway is on the same subnet.

•

Always

: Advertise route in all RIP messages.

•

Never

: Do not advertise route.

Click the

button. The Alert icon

will appear, so that you can switch to the

Save Changes

page, when you are finished.

Once you save your changes, you will be returned to the IP Static Routes entry screen.

•

You can continue to

Add

,

Edit

, or

Delete

Static Routes from this screen.

75

Configure

When you are finished, click the Alert icon

, switch to the

Save Changes

page, and

click the

link.

Your Gateway maintains a dynamic Address Resolution Protocol (ARP) table to map IP

addresses to Ethernet (MAC) addresses. It populates this ARP table dynamically, by retriev-

ing IP address/MAC address pairs only when it needs them. Optionally, you can define

static ARP entries to map IP addresses to their corresponding Ethernet MAC addresses.

Unlike dynamic ARP table entries, static ARP table entries do not time out. The IP address

cannot be 0.0.0.0. The Ethernet MAC address entry is in nn-nn-nn-nn-nn-nn (hexadecimal)

format.

Pinholes allow you to transparently route selected types of network traffic, such as FTP

requests or HTTP (Web) connections, to a specific host behind the Gateway. Creating a pin-

hole allows access traffic originating from a remote connection (WAN) to be sent to the

internal computer (LAN) that is specified in the Pinhole page.

Pinholes are common for applications like multiplayer online games. Refer to software

manufacturer application documentation for specific traffic types and port numbers.