Network Address Formats - 3Com 3C421600A Reference Manual

50 C 3: R
HAPTER OUTER
Network Address
Formats
C O
OMMAND VERVIEW
Configuration changes are impermanent: they occur immediately but
are lost on reboot unless you save them because the save all
command places configuration changes in FLASH memory. These
changes are lost by the SuperStack II Remote Access System (RAS)
1500, if power fails before saving them.
Some commands such as add ip network and reconfigure do
not take effect immediately.
Some delete commands require that you first disable the process or
function. For example, before using the commands to delete a
network user, interface, or network service, first disable the process or
function.
In most cases, wherever an IP address value is required, you can enter
a host name provided you have configured a Domain Name System
(DNS) server or put the name and address into the DNS Local Host
Table.
You can create a script file - a text file containing CLI commands - to
simplify repetitive tasks. Use Trivial File Transfer Protocol (TFTP) to
transfer the file to the FLASH file system, then use the do command to
run the script file.
Many commands require a network address, to define a link to a remote
host, workstation or network. Internet Protocol (IP) and Internet Packet
Exchange (IPX) network addresses shown in this document use the syntax
described in the following table. IP netmasks can be configured three
ways: using the CLI mask signifier (A,B,C or H), using the standard format
(nnn.nnn.nnn.nnn) or counting the one bits in a range from 8-30 (32 for
a host). For help setting bitmasks, see Appendix C, "Addressing
Schemes" for a bitmask table.
Address
Type Format
IP_ a.b.c.d
address
ip_net_ a.b.c.d/mask
address
ipx_net_ xxxxxxxx
address
Range
0.0.0.0 to 255.255.255.255 (decimal).
address 127.x.x.x is reserved for Loopback.
address 247.x.x.x or higher is not part of a valid IP
Network Class (A, B, C)
address 0.0.0.0 is invalid in most contexts.
255.255.255.255/A,B,C,H or nnn.nnn.nnn.nnn or
8-30 bits
hexadecimal