5-10
Stinger® MS+ Getting Started Guide
Configuring the Control Module and System Timing
Providing a basic system IP configuration
even after nonvolatile memory has been cleared with the NVRAM command. For
more information about retaining a configuration after clearing NVRAM, see the
Stinger Administration Guide
.
Note
A Stinger unit
does not
require
IP routing to operate as a DSLAM. IP routing is
not used by the DSLAM activities. The system does not provide IP routing for DSLAM
user data.
IP address syntax
The Stinger unit uses dotted decimal notation (not hexadecimal) for IP addresses.
Netmask information is appended to the IP address after a forward slash (/).
Netmasks
If no netmask is specified, the unit uses a default mask based on the class of the IP
address that is supplied. Table 5-1 shows address classes and the number of network
bits in the default mask for each class.
For example, a class C address, such as 198.5.248.40, has 24 network bits, leaving 8
bits for the host portion of the address. If no subnet mask is specified for a class C
address, the Stinger unit uses the default mask of 24 bits, as shown in Figure 5-5.
Figure 5-5. Default netmask for class C IP address
By default, this address is displayed as 198.5.248.40/24.
Subnets
Subnets are permitted under the same syntax. A subnet address specifies a number of
network bits that does not adhere to the Class A, B, or C network limits. For example,
the following address specifies a 29-bit subnet:
ip-address = 198.5.248.40/29
In this address, 29 bits of the address are used to specify the network. The 3
remaining bits are used to specify eight addresses on the subnet. With 3 bits used to
specify hosts on a 29-bit subnet, eight different bit combinations are possible. Of
those eight possible host addresses, two are reserved:
Table 5-1. IP address classes and number of network bits
Class
Address range
Default network
bits
Class A
0.0.0.0 through 127.255.255.255
8
Class B
128.0.0.0 through
191.255.255.255
16
Class C
192.0.0.0 through
223.255.255.255
24
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
Default 24 bits
