ZyXEL Communications 5 Series User Manual

Chapter 8 Bridge Screens

ZyWALL 5/35/70 Series User’s Guide

Use the Port Roles screen to set ports as part of the LAN, DMZ and/or WLAN interface. 

Ports 1~4 on the ZyWALL 5 and ZyWALL 35 ports can be part of the LAN, DMZ or WLAN 
interface. The ZyWALL 70 has a separate (dedicated) LAN port, so ports 1~4 can be set as 
part of the DMZ and/or WLAN interface.

To change your ZyWALL’s port role settings, click NETWORK > BRIDGE > Port Roles. 
The screen appears as shown.

First/Second/Third DNS 
Server

DNS (Domain Name System) is for mapping a domain name to its 
corresponding IP address and vice versa. The DNS server is extremely 
important because without it, you must know the IP address of a machine 
before you can access it. The ZyWALL uses a system DNS server (in the 
order you specify here) to resolve domain names for content filtering, the 
time server, etc.
If you have the IP address(es) of the DNS server(s), enter the DNS server's 
IP address(es) in the field(s) to the right. 

Rapid Spanning Tree 
Protocol Setup

Enable Rapid Spanning 
Tree Protocol

Select the check box to activate RSTP on the ZyWALL.

Bridge Priority

Enter a number between 0 and 61440 as bridge priority of the ZyWALL. 
Bridge priority is used in determining the root switch, root port and 
designated port. The switch with the highest priority (lowest numeric value) 
becomes the root. If multiple devices have the lowest priority, the device 
with the lowest MAC address becomes the root.
The lower the numeric value you assign, the higher the priority for this 
bridge.
Bridge Priority determines the root bridge, which in turn determines Hello 
Time, Max Age and Forward Delay. 

Bridge Hello Time

Enter an interval (between 1 and 10) in seconds that the root bridge waits 
before sending a hello packet. 

Bridge Max Age

Enter an interval (between 6 and 40) in seconds that a bridge waits to get a 
Hello BPDU from the root bridge.

Forward Delay

Enter the length of time (between 4 and 30) in seconds that a bridge 
remains in the listening and learning port states. The default is 15 seconds.

Bridge Port

This is the bridge port type. 

RSTP Active

Select the check box to enable RSTP on the corresponding port.

RSTP Priority 
0(Highest)~240(Lowest)

Enter a number between 0 and 240 as RSTP priority for the corresponding 
port. 0 is the highest.

RSTP Path Cost 
1(Lowest)~65535(Highe
st)

Enter a number between 1 and 65535 as RSTP path cost for the 
corresponding port. 65535 is the highest.

Apply

Click Apply to save your changes back to the ZyWALL.

Reset

Click Reset to begin configuring this screen afresh.

Table 31   NETWORK > Bridge  (continued)