T464 Installation and Setup
20090709 v1r0 JED Microprocessors Pty. Ltd. - Page 5 of 27
DHCP
Examples of some typical network installations employing DHCP are:
•
A business intranet that has a gateway modem configured to provide
internet access and DHCP service.
•
A default Windows peer to peer private network at a school that has a
single PC connected to the internet which has also been configured to
provide
“internet connection sharing”
(Windows ICS). This PC is
effectively a DHCP server and gateway.
•
A university WAN that uses DHCP and MAC locked IP allocation
across multiple subnets.
MAC locked DHCP
A network administration department may maintain a database of IP allocated
to MAC addresses. The DHCP service running on such a network will only
allocate an IP to a registered MAC. This network would typically comprise
multiple subnets. The T464 default network settings will allow the DHCP
server to configure the IP, subnet and gateway parameters automatically.
Manually allocated IP
This involves using a serial terminal to provide the T464 with:
•
The allocated IP
•
Subnet Mask
•
Gateway IP (if the administration terminal is on a different subnet).
Note:
Some IP addresses (such as the Loopback Addresses range) may be
allocated, but cannot be used. By convention, the numerically lowest and
highest addresses of a subnet are not allocated, as they refer to the subnet’s
network ID and Broadcast address.
Ports
All communication between a T464 and the administration terminal uses TCP
port 10001. Some network security software may block access to this port and
it may be necessary to alter port usage permissions.
Installations where the T464 and the administration terminal are on the same
subnet may make use of auto discovery. Auto discovery relies on issuing a
broadcast command via UDP on port 30718 and capturing the IP of each
T464 that responds.
Port TCP 80 is reserved for http and may be employed in future software
versions.
Subnets
Typically, larger domains are partitioned into subnets. These networks usually
employ DHCP to configure attached devices. Should it be necessary to
manually configure a T464 on a network where the administration terminal
resides on a different subnet, a gateway IP must be provided.