41
B-2: TCP/IP Settings Problems
Fig. 52. Communication stages for a client to reach its correspondent host
For a wireless client computer to communicate with a correspondent host on the Internet by the host’s
domain name (e.g.
http://www.wi-fi.com
), it first sends a DNS request to a DNS server on the Internet.
The DNS request travels first to the AP, then the HD24613 relays this request to the default gateway
of the client computer. Finally, this request is forwarded by the gateway to the DNS server on the In-
ternet. The DNS reply issued by the DNS server is transmitted back to the client computer following a
reverse path. When the client computer receives the DNS reply, it knows the IP address of the cor-
respondent host and sends further packets to this IP address.
As illustrated in Fig. 52, the communication path could be broken at some of the stages. The
OS-provided network diagnostic tool,
ping.exe
, can be employed to find out TCP/IP-related commu-
nication problems.
NOTE:
If
two or more
NICs are installed and operating on a client computer, TCP/IP may not work
properly due to incorrect entries in the routing table. Use the OS-provided command-line network
tool,
route.exe
, to add or delete entries from the routing table. Or, use Windows
-
provided
Device
Manager
to disable unnecessary NICs.
Solve the following problems in order:
z
The HD24613 does not respond to ping from the client computer.
Are two or more NICs installed on the client computer?
Use the OS-provided command-line network tool,
route.exe
, to modify the contents
of the routing table.
Use Windows-provided
Device Manager
to disable unnecessary NICs.
Is the underlying link (Ethernet or IEEE 802.11g) established?
Make sure the Ethernet link is OK.
Make sure the wireless settings of the wireless client computer and of the HD24613
