Racal Instruments 1256E Manual page 70

Computer Interfaces 4-6
5. It is possible to see when the 1256 successfully negotiates an
address with a DHCP server. Normally after applying power to
a 1256 the octet fields for the IP address, gateway address,
and netmask have values of zero.
assigns and address to the 1256, these fields will be non-zero.
To view the first octet of the IP address, press the third key,
selecting line 3. Rotate the knob until the display reads:
-----SETTINGS-----
Type: TCP/IP
> Option: IP_Oct_1 <
Status: 172
In the example above, the first octet would be "172".
Continuing to scroll through the various octets under the Option
category on the third line would give the complete IP address,
gateway address, and the subnet mask. For example if the
remaining IP_Oct_2, IP_Oct_3, and IP_Oct_4 fields displayed
values of "16", "30", "35" respectively, the DHCP-assigned IP
address would be "172.16.30.35". It is important to note that
while in DHCP mode, the values for the various octets can be
viewed but not changed.
Using Static Addressing
In Manual Mode, the user decides what static IP address, gateway,
and sub-net mask to use, and enters them manually. The first step
is to put the 1256 into Manual Set mode, to allow setting of the
TCP/IP parameters.
Before attempting to use static or manual addressing on a 1256,
several important things must be kept in mind:
•
Do not randomly assign an address to the 1256. Duplicate or
incorrect addresses on a central network can cause
unpredictable problems and failures that are difficult to identify
and trace. They also tend to be intermittent which further
compound troubleshooting efforts. If the 1256 will be used on
a central network, contact the network administrator for an
assignment or a block assignment of addresses.
•
Make sure that the assigned subnet mask for a 1256 system is
consistent with the class of network. For example a class C
network (i.e. "192.168.X.X") would typically have a subnet
mask of "255.255.255.0". A class B network (i.e. "172.16.X.X")
would typically have a subnet mask of "255.255.0.0".
1256E User Manual
After a DCHP server
Racal Instruments © 2002