11
3.3 DHCP
DHCP, Dynamic Host Configuration Protocol enables individual computers or devices to
extract their IP configurations from a server (DHCP server). If the DHCP is enabled on
your iServer, as soon as the iServer is connected to the network, there is an exchange of
information between DHCP server and the iServer. During this process the IP address,
the Gateway address, and the Subnet Mask will be assigned to the iServer by the DHCP
server. Note that the DHCP server must be configured correctly to do such assignment.
If a fixed or static IP address is desired, the DHCP must be disabled. The iServer is
shipped with DHCP disabled (factory default). The DHCP can be enabled by setting the
DIP switch #3 to the
“ON”
position (refer to
Figure 3.2
).
To enable the DHCP, besides using DIP switch
#3, set the iServer’s IP address to
0.0.0.0
.
An iServer with IP address of 0.0.0.0 will request
an IP address, gateway address, and subnet
mask from the DHCP server over the Ethernet.
If the DHCP is enabled, the iServer will not fully
boot-up until the DHCP IP address is received.
While the iServer is requesting an IP address
from the DHCP server the iServer’s LCD display
will show the firmware version. It will display the
readings once the DHCP IP assignment is
complete.
3.4 DNS
DNS, Domain Name System enables individual computers and devices to be recognized
over a network based on a specific name instead of an IP address. For example, instead
of having to use
http://192.168.1.200
(IP address), you would use only
http://eis03ec
or
any eight character name stored as Host Name under the Access Control page in the
iServer Home Page. The default DNS name for an iServer is
"eis"
followed by the last
four digits of the MAC address of that particular iServer.
1. It is very important to communicate with the network administrator in order to
understand the DHCP and its existing configurations on the host server,
before enabling the DHCP on the iServer.
2. The iServers are shipped with a default static IP address of
192.168.1.200
and Subnet Mask of
255.255.255.0
.
3. On Windows servers where DHCP and DNS are separate functions it is very
important to configure the DHCP server to communicate with the DNS in
order for the iServer’s Host Name to correctly respond. If you cannot access
the iServer using its Host Name, please contact your network administrator to
make sure the DHCP and DNS servers are linked together.
3.5 IP Address
Every active device connected to the TCP/IP network must have a unique IP address.
This IP address is used to build a connection to the iServer. Every computer using
TCP/IP should have a unique 32-bit address. It is divided into two portions, the network
ID and the host ID. For instance, every computer on the same network uses the same
network ID. At the same time, all of them have a different host ID. For more details about
the IP address see
Appendix B
.
DIP switch
#3 shown
in
“ON”
position
1
4
3
2
OFF
ON
1
4
3
2
OFF
ON
Figure 3.2 DIP Switch on the
Bottom Side of iServer
