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Appendix B IP Addresses and Subnetting
AMG1302/AMG1202-TSeries User’s Guide
271
Subnet Planning
The following table is a summary for subnet planning on a network with a 24-bit network number.
The following table is a summary for subnet planning on a network with a 16-bit network number.
Configuring IP Addresses
Where you obtain your network number depends on your particular situation. If the ISP or your
network administrator assigns you a block of registered IP addresses, follow their instructions in
selecting the IP addresses and the subnet mask.
If the ISP did not explicitly give you an IP network number, then most likely you have a single user
account and the ISP will assign you a dynamic IP address when the connection is established. If this
is the case, it is recommended that you select a network number from 192.168.0.0 to
192.168.255.0. The Internet Assigned Number Authority (IANA) reserved this block of addresses
specifically for private use; please do not use any other number unless you are told otherwise. You
must also enable Network Address Translation (NAT) on the AMG1302/AMG1202-TSeries.
Table 103
24-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
1
255.255.255.128 (/25)
2
126
2
255.255.255.192 (/26)
4
62
3
255.255.255.224 (/27)
8
30
4
255.255.255.240 (/28)
16
14
5
255.255.255.248 (/29)
32
6
6
255.255.255.252 (/30)
64
2
7
255.255.255.254 (/31)
128
1
Table 104
16-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
1
255.255.128.0 (/17)
2
32766
2
255.255.192.0 (/18)
4
16382
3
255.255.224.0 (/19)
8
8190
4
255.255.240.0 (/20)
16
4094
5
255.255.248.0 (/21)
32
2046
6
255.255.252.0 (/22)
64
1022
7
255.255.254.0 (/23)
128
510
8
255.255.255.0 (/24)
256
254
9
255.255.255.128 (/25)
512
126
10
255.255.255.192 (/26)
1024
62
11
255.255.255.224 (/27)
2048
30
12
255.255.255.240 (/28)
4096
14
13
255.255.255.248 (/29)
8192
6
14
255.255.255.252 (/30)
16384
2
15
255.255.255.254 (/31)
32768
1
Page 272 / 320
Appendix B IP Addresses and Subnetting
AMG1302/AMG1202-TSeries User’s Guide
272
Once you have decided on the network number, pick an IP address for your AMG1302/AMG1202-
TSeries that is easy to remember (for instance, 192.168.1.1) but make sure that no other device on
your network is using that IP address.
The subnet mask specifies the network number portion of an IP address. Your AMG1302/AMG1202-
TSeries will compute the subnet mask automatically based on the IP address that you entered. You
don't need to change the subnet mask computed by the AMG1302/AMG1202-TSeries unless you
are instructed to do otherwise.
Private IP Addresses
Every machine on the Internet must have a unique address. If your networks are isolated from the
Internet (running only between two branch offices, for example) you can assign any IP addresses to
the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has
reserved the following three blocks of IP addresses specifically for private networks:
• 10.0.0.0
— 10.255.255.255
• 172.16.0.0
— 172.31.255.255
•
192.168.0.0 — 192.168.255.255
You can obtain your IP address from the IANA, from an ISP, or it can be assigned from a private
network. If you belong to a small organization and your Internet access is through an ISP, the ISP
can provide you with the Internet addresses for your local networks. On the other hand, if you are
part of a much larger organization, you should consult your network administrator for the
appropriate IP addresses.
Regardless of your particular situation, do not create an arbitrary IP address; always follow the
guidelines above. For more information on address assignment, please refer to RFC 1597,
Address
Allocation for Private Internets
and RFC 1466,
Guidelines for Management of IP Address Space.
Page 273 / 320
AMG1302/AMG1202-TSeries User’s Guide
273
A
PPENDIX
C
Pop-up Windows, JavaScripts and Java
Permissions
In order to use the web configurator you need to allow:
•
Web browser pop-up windows from your device.
•
JavaScripts (enabled by default).
•
Java permissions (enabled by default).
Note: Internet Explorer 6 screens are used here. Screens for other Internet Explorer
versions may vary.
Internet Explorer Pop-up Blockers
You may have to disable pop-up blocking to log into your device.
Either disable pop-up blocking (enabled by default in Windows XP SP (Service Pack) 2) or allow
pop-up blocking and create an exception for your device’s IP address.
Disable Pop-up Blockers
1
In Internet Explorer, select
Tools
,
Pop-up Blocker
and then select
Turn Off Pop-up Blocker
.
Figure 162
Pop-up Blocker
You can also check if pop-up blocking is disabled in the
Pop-up Blocker
section in the
Privacy
tab.
1
In Internet Explorer, select
Tools
,
Internet Options
,
Privacy
.
2
Clear the
Block pop-ups
check box in the
Pop-up Blocker
section of the screen. This disables any
web pop-up blockers you may have enabled.
Page 274 / 320
Appendix C Pop-up Windows, JavaScripts and Java Permissions
AMG1302/AMG1202-TSeries User’s Guide
274
Figure 163
Internet Options: Privacy
3
Click
Apply
to save this setting.
Enable Pop-up Blockers with Exceptions
Alternatively, if you only want to allow pop-up windows from your device, see the following steps.
1
In Internet Explorer, select
Tools
,
Internet Options
and then the
Privacy
tab.
2
Select
Settings…
to open the
Pop-up Blocker Settings
screen.
Page 275 / 320
Appendix C Pop-up Windows, JavaScripts and Java Permissions
AMG1302/AMG1202-TSeries User’s Guide
275
Figure 164
Internet Options: Privacy
3
Type the IP address of your device (the web page that you do not want to have blocked) with the
prefix “http://”. For example, http://192.168.167.1.
4
Click
Add
to move the IP address to the list of
Allowed sites
.
Figure 165
Pop-up Blocker Settings

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