DekTec DTE-3114 IP to 4x QAM - Manual (Page 12)

DTE-3114 – Networked Quad QAM Modulator
USER MANUAL
12
How to reach a DTE-3114 with IP address 169.254.x.x?
This problem may occur in a network with statically assigned IP addresses, without DHCP server. The
DTE-3114 has assigned itself a link-local address 169.254.x.x. However, the browser PC has a
static IP address that will most likely reside on a different subnet.
A web browser running under Windows Vista, Windows 7 or Linux will still be able to access the
DTE-3114, because these operating systems recognize link-local addresses as a special case.
However, a web browser running on Windows XP will not be able to gain access to the device,
because the subnet of the web browser is different from the DTE’s subnet.
To access the DTE-3114 from Windows XP it is required that the link-local subnet is present in the
routing table. This can be verified by using the command: route print. In the routing table only one
link-local route (169.254.x.x) may be present through the network card which is connected to the
DTE-3114.
Example 1:
Assume that a PC running XP hosts 2 network cards with fixed IP addresses 192.168.100.28 and
192.168.200.3 and no DHCP server is available. The DTE-3114 is located on the network segment
connected to the network card with IP address 192.168.200.3 and has assigned itself link-local IP
address 169.254.225.123. The "route print" command may give the following result:
C:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 14 f4 00 00 2b ...... DekTec DTA-160 Gigabit Ethernet Port
0x3 ...00 1c c0 38 60 33 ...... Intel(R) 82566DC-2 Gigabit Network Connection
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.100.100 192.168.100.28 20
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.100.0 255.255.255.0 192.168.100.28 192.168.100.28 20
192.168.100.28 255.255.255.255 127.0.0.1 127.0.0.1 20
192.168.100.255 255.255.255.255 192.168.100.28 192.168.100.28 20
192.168.200.0 255.255.255.0 192.168.200.3 192.168.200.3 10
192.168.200.3 255.255.255.255 127.0.0.1 127.0.0.1 10
192.168.200.255 255.255.255.255 192.168.200.3 192.168.200.3 10
224.0.0.0 240.0.0.0 192.168.100.28 192.168.100.28 20
224.0.0.0 240.0.0.0 192.168.200.3 192.168.200.3 10
255.255.255.255 255.255.255.255 192.168.100.28 192.168.100.28 1
255.255.255.255 255.255.255.255 192.168.200.3 192.168.200.3 1
Default Gateway: 192.168.100.100
===========================================================================
Persistent Routes:
None
In this routing table no link-local route is present. To add the route use the following command:
route ADD 169.254.0.0 MASK 255.255.0.0 192.168.200.3
This will result in the following routing table: