3Com OfficeConnect User Manual - Network
B-4
A
PPENDIX
B: IP
AND
IPX A
DDRESSES
The bits of the subnet mask are set to 1 if the device
should treat the corresponding bit in the IP address as
part of the original network number or as part of the
subnet number. These bits in the mask are set to 0 if
the device should treat the bit as part of the device
number, as shown in
Figure B-1 Using a Subnet Mask to Obtain the Subnet Address
CAUTION: To ensure that you can always
communicate with the switch through the console
port, the IP subnet 192.168.101.x is permanently
assigned to the SLIP port in addition to the user
configurable SLIP address. Do not use this subnet for
your Ethernet (network).
Assigning IP Addresses to a Small, Contained
Network
If you have a small network (less than 255 devices)
that you do not plan to connect to the Internet then
here is a guide as to what you can use for the IP
addresses and subnet mask:
■
Use an IP address that is in the range
192.000.001.xxx to 223.255.254.xxx (Class C) to
define your network, and allocate device numbers
(the xxx part of the IP address), starting from 1.
■
Use a dummy subnet mask of 255.255.255.0 to
match the network portion of your IP addresses.
Remember that no two devices on a network may
have the same IP address.
IPX Addresses
If you are using the IPX protocol, the OfficeConnect
Switch 140M is allocated an IPX address
automatically by the local IPX router or NetWare File
Server. This happens approximately 60 seconds after
the hub is powered up for the first time. You should
never need to change the allocated address.