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4. Click on button to backup the system configuration.
10.7.3  Restore System Configuration
Follow the steps below to backup system configuration:
1.  Open  the  System  Configuration  Restore  page  by  clicking  the  Management ->Configuration ->Restore
 menu. 
Figure 10.12 Restore System Configuration Page
2. Enter the path and name of the system configuration file that you want to restore in the “Configuration File” text box. Alternatively, 
you may click on the "Browse..." button to search for the system 
configuration  file  on  your  hard  drive.  A  window  similar  to  the 
one  shown  in  Figure  10.13  will  pop  up  for  you  to  select  the 
configuration file to restore. 
						

							
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Figure 10.13 Selecting System Configuration from the File Manager
3.  Click  on Apply  button  to  restore  the  system  configuration.  A 
dialog  window,  such  as  the  one  below,  will  pop  up  to  ask  for 
confirmation for restoring the system configuration. Click the 
OK 
button  to  proceed;  otherwise,  click  the 
Cance l  button  to  cancel 
the  action.  Note  that  the  RX3042H  will  reboot  to  make  the  new 
system configuration in effect.
Figure 10.14 System Configuration Restoration Confirmation
4.  A  system  reboot  count  down  timer  will  display,  as  shown  in  Figure 10.15. Youʼll be reconnected back to RX3042H when the 
counter returns to zero. You may need to manually connect back 
to  the  RX3042H  if  you  are  not  connected  back  to  RX3042H 
automatically. 
						

							
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Figure 10.15 System Reboot Counter Timer
10.8  Firmware Upgrade
ASUSTeK may from time to time provide you with an update to the 
firmware running on the RX3042H. All system software is contained 
in a single file, called an image. Configuration Manager provides an 
easy way to upload the new firmware image. To upgrade the image, 
follow this procedure:
1. Open the Firmware Upgrade page, as shown in Figure 10.16, by 
clicking the System ->Firmware Upgrade menu.
Figure 10.16 Firmware Upgrade Page
2. In the Select Firmware text box, enter the path and name of the  firmware  image  file. Alternatively,  you  may  click  on  Browse...
 
button to open a file manager, similar to Figure 10.17, to search 
for the firmware image on your computer. 
						

							
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Figure 10.17 Selecting Firmware from the File Manager
3.  Click  on Apply  button  to  update  the  firmware. A  dialog  window, 
such as the one below, will pop up to ask for confirmation of the 
firmware  upgrade.  Click  the  OK  button  to  proceed;  otherwise, 
click the Cancel button to cancel the action.
Figure 10.18 Firmware Upgrade Confirmation
4 .   F i r m w a r e   u p g r a d e   s t a t u s   a n d   p r o g r e s s   w i l l   b e   s h o w n   a s 
illustrated in Figure 10.19
Figure 10.19 Firmware Upgrade Progress 
						

							
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5. A  count  down  timer  will  display,  as  shown  in  Figure  10.20,  after 
the  firmware  upgrade  is  completed.  Youʼll  be  reconnected 
back  to  RX3042H  when  the  counter  returns  to  zero.  You  may 
need  to  manually  connect  back  to  the  RX3042H  if  you  are  not 
connected back to RX3042H automatically.
Figure  10.20  System  Reboot  Count  Down  Timer  for  Firmware 
Upgrade 
6. When you are reconnected to the RX3042H, click Status  menu 
to check if the new firmware is properly upgraded. Note that you 
probably  need  to  clear  the  cache  of  your  web  browser  to  see 
the new System Information page. Following is the procedure to 
clear the browser cache for Microsoft Internet Explorer:
a) Click on  Tools menu
b) Click on Internet Options... menu
c) Click on Delete Files... button to clear the browser cache.
10.9  Restart System
1.  Open  the  Restart  System  page,  as  shown  in  Figure  10.21,  by 
clicking the Management ->Restart System menu.
2. Click on the Apply button to restart the system. 
						

							
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Figure 10.21 Restart System Page
10.9  Logout Configuration Manager
To  logout  of  Configuration  Manager,  open  the  Logout  page  by 
clicking  the  Logout  menu  and  click  on  the Apply  button.  If  you 
are  using  IE  as  your  browser,  a  window  similar  to  the  one  shown 
in  Figure  10.22  will  prompt  for  confirmation  before  closing  your 
browser.
Figure 10.22 Configuration Manager Logout Page
Figure 10.23 Confirmation for Closing Browser (IE) 
						

							
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RX3042H User's Manual  IP Address, Network Masks, and Subnets
11  IP Addresses, Network Masks, and Subnets
11.1  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 11.
IP addresses, the Internetʼs version of telephone numbers, are used 
to  identify  individual  nodes  (computers  or  devices)  on  the  Internet. 
Every  IP  address  contains  four  numbers,  each  from  0  to  255  and 
separated  by  dots  (periods),  e.g.  20.56.0.211.  These  numbers  are 
called, from left to right, field1, field2, field3, and field4.
This style of writing IP addresses as decimal numbers separated by 
dots  is  called  dotted  decimal  notation.  The  IP  address  20.56.0.211 
is read “twenty dot fifty-six dot zero dot two-eleven.”
11.1.1  Structure of an IP address
IP addresses have a hierarchical design similar to that of telephone 
numbers.  For  example,  a  7-digit  telephone  number  starts  with  a 
3-digit prefix that identifies a group of thousands of telephone lines, 
and ends with four digits that identify one specific line in that group. 
Similarly, IP addresses contain two kinds of information.
•  Network ID
Identifies a particular network within the Internet or Intranet
•  Host IDIdentifies a particular computer or device on the network
The  first  part  of  every  IP  address  contains  the  network  ID,  and  the 
rest  of  the  address  contains  the  host  ID. The  length  of  the  network 
ID  depends  on  the  networkʼs  class  (see  following  section).  Table 
11.1 shows the structure of an IP address.  
						

							
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Table 11.1. IP Address Structure
Field 1Field 2Field 3Field 4
Network IDHost ID
Network IDHost ID
Network IDHost ID
Class A
Class B
Class C
Here are some examples of valid IP addresses:
Class A: 10.30.6.125 (network = 10, host = 30.6.125)
Class B: 129.88.16.49 (network = 129.88, host = 16.49)
Class C: 192.60.201.11 (network = 192.60.201, host = 11)
11.2  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  Internetʼs  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 
size,  these  networks  are  used  for  WANs  and  by  organizations  at 
the infrastructure level of the Internet, such as your ISP.
Class B networks are smaller but still quite large, each able to hold 
over  65,000  hosts.  There  can  be  up  to  16,384  class  B  networks 
in  existence.  A  class  B  network  might  be  appropriate  for  a  large 
organization such as a business or government agency.
Class  C  networks  are  the  smallest,  only  able  to  hold  254  hosts  at 
most,  but  the  total  possible  number  of  class  C  networks  exceeds  2 
million (2,097,152 to be exact). LANs connected to the Internet are 
usually class C networks.
Some important notes regarding IP addresses:
The class can be determined easily from field1:  field1 = 1-126:  Class A
  field1 = 128-191:  Class B
  field1 = 192-223:  Class C
(field1 values not shown are reserved for special uses) 
						

							
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•   A  host  ID  can  have  any  value  except  all  fields  set  to  0  or  all fields set to 255, as those values are reserved for special uses.
11.3  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  subnetʼs  network  ID  is 
created by “borrowing” one or more bits from the host ID portion of 
the address. The subnet mask identifies these host ID bits.
For  example,  consider  a  class  C  network  192.168.1.  To  split  this 
into two subnets, you would use the subnet mask:
255.255.255.128
Itʼs easier to see whatʼs happening if we write this in binary: 
11111111. 11111111. 11111111.10000000
As  with  any  class  C  address,  all  of  the  bits  in  field1  through  field  3 
are part of the network ID, but note how the mask specifies that the 
first  bit  in  field  4  is  also  included.  Since  this  extra  bit  has  only  two 
values  (0  and  1),  this  means  there  are  two  subnets.  Each  subnet 
uses the remaining 7 bits in field4 for its host IDs, which range from 
0 to 127 (instead of the usual 0 to 255 for a class C address).
Similarly, to split a class C network into four subnets, the mask is:
255.255.255.192    or    11111111. 11111111. 11111111.11000000
The two extra bits in field4 can have four values (00, 01, 10, 11), so 
there  are  four  subnets.  Each  subnet  uses  the  remaining  six  bits  in 
field4 for its host IDs, ranging from 0 to 63.
Sometimes  a  subnet  mask  does  not  specify  any  additional network ID bits, and thus no subnets. Such  a mask is called a default subnet mask. These masks 
are: 
						

							
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Class A:  255.0.0.0
Class B:  255.255.0.0
Class C:  255.255.255.0
These  are  called  default  because  they  are  used  when  a  network  is 
initially configured, at which time it has no subnets.