Asus Router RX3141 User Manual

RX3141 User’s Manual Chapter 11. System Management 
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11.7.2 Restore System Configuration 
Follow the steps below to backup system configuration: 
1. Open the 
System Configuration Backup/Restore configuration page by double clicking the 
Management Î Backup/Restore menu. 
2.  Enter the path and filename of the system configuration file that you want to restore in the text 
field.  
 
 
Figure 11.19. System Configuration Restore Page 
Alternatively, you may click on the 
 button to search for the...

Chapter 11. System Management RX3141 User’s Manual 
82 
3. Click on  button to restore the system configuration.  
4.  A message will pop up, as illustrated in Figure 11.21, to let you know whether the system 
configuration is successfully restored. Note that you must reboot the RX3141 to make the new 
system configuration in effect. 
 
Figure 11.21. System Configuration Restore Status 
  

RX3141 User’s Manual  Chapter 12. IP Addresses, Network Masks, and Subnets 
 83 
12 IP Addresses, Network Masks, and Subnets 
12.1 IP Addresses 
 Note 
This section pertains only to IP addresses for IPv4 (version 4 of 
the Internet Protocol). IPv6 addresses are not covered. 
This section assumes basic knowledge of binary numbers, bits, 
and bytes. For details on this subject, see Appendix 12. 
IP addresses, the Internets version of telephone numbers, are used to identify individual nodes (computers or...

Chapter 12. IP Addresses, Network Masks, and Subnets  RX3141 User’s Manual 
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12.2 Network classes 
The three commonly used network classes are A, B, and C. (There is also a class D but it has a special use 
beyond the scope of this discussion.) These classes have different uses and characteristics.  
Class A networks are the Internets largest networks, each with room for over 16 million hosts. Up to 126 of 
these huge networks can exist, for a total of over 2 billion hosts. Because of their huge...

RX3141 User’s Manual  Chapter 12. IP Addresses, Network Masks, and Subnets 
 85 
 
12.3 Subnet masks 
 
Definition 
mask 
A mask looks like a regular IP address, but contains a pattern of 
bits that tells what parts of an IP address are the network ID and 
what parts are the host ID: bits set to 1 mean this bit is part of the 
network ID and bits set to 0 mean this bit is part of the host ID. 
Subnet masks are used to define subnets (what you get after dividing a network into smaller pieces). A 
subnets...

RX3141 User’s Manual Appendix   
 87 
13 Troubleshooting 
This appendix suggests solutions for problems you may encounter in installing or using the RX3141, and 
provides instructions for using several IP utilities to diagnose problems.  
Contact Customer Support if these suggestions do not resolve the problem. 
 
Problem Troubleshooting Suggestion 
Power LED does not 
illuminate after 
product is turned on. Verify that you are using the AC adapter provided with the 
device and that it is securely...

Appendix  RX3141 User’s Manual 
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Problem Troubleshooting Suggestion 
PCs cannot display 
web pages on the 
Internet. Verify that the DNS server specified on the PCs is correct for 
your ISP, as discussed in the item above. You can use the ping 
utility, discussed in the following section, to test connectivity with 
your ISP’s DNS server. 
Configuration Manager Program 
You forgot/lost your 
Configuration 
Manager user ID or 
password. If you have not changed the password from the default, try using...

RX3141 User’s Manual Appendix  
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Figure 13.1. Using the ping Utility 
If the target computer cannot be located, you will receive the message “Request timed out.” 
Using the ping command, you can test whether the path to the RX3141 is working (using the preconfigured 
default LAN IP address 192.168.1.1) or another address you assigned. 
You can also test whether access to the Internet is working by typing an external address, such as that for 
www.yahoo.com
 (216.115.108.243). If you do not know the...

Appendix  RX3141 User’s Manual 
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Figure 13.2. Using the nslookup Utility 
There may be several addresses associated with an Internet name. This is common for web sites that receive 
heavy traffic; they use multiple, redundant servers to carry the same information. 
To exit from the nslookup utility, type 
exit and press  at the command prompt.