P-661H/HW Series User’s Guide

 

Table 28 More Connections Advanced Setup (continued)

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

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.

 

Sustain 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.

 

Maximum Burst

Maximum Burst Size (MBS) refers to the maximum number of cells that can be sent

 

Size

at the peak rate. Type the MBS, which is less than 65535.

 

Back

Click Back to return to the previous screen.

 

 

 

 

Apply

Click Apply to save the changes.

 

 

 

 

Cancel

Click Cancel to begin configuring this screen afresh.

 

 

 

4.7 Traffic Redirect

Traffic redirect forwards traffic to a backup gateway when the ZyXEL Device cannot connect to the Internet. An example is shown in the figure below.

Figure 43 Traffic Redirect Example

The following network topology allows you to avoid triangle route security issues when the backup gateway is connected to the LAN. Use IP alias to configure the LAN into two or three logical networks with the ZyXEL Device itself as the gateway for each LAN network. Put the protected LAN in one subnet (Subnet 1 in the following figure) and the backup gateway in another subnet (Subnet 2). Configure filters that allow packets from the protected LAN (Subnet 1) to the backup gateway (Subnet 2).

Chapter 4 WAN Setup

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