Frequently Asked Questions

LAN questions (switch)

1. I cannot get into my Vigor's web configurator and the Dial-up Networking tries to dial continuously. What should I do?
2. I can neither map shared disks nor see other computers in my network neighbourhood, although I can successfully ping them, what should I do ?
3. Can I add wireless LAN to a DrayTek router ?
4. How can I find my router's uplink port ?
5. From Vigor router's LAN subnet, why does "Trace Route" not function in a Linux system although it works normally from a Win2k box?
6. How could I get the telnet command for routers?
7. How do I capture PC's LAN packets for support engineer's analysis ?

If your question is not answered here, check our Discussion Forum, and if still no answer then email us.

My computer cannot connect to my router's menu page (at http://192.168.1.1).

No menu comes up, this is, of course, after I have set up the network to use the DHCP automatic config for the router Ip etc. 

Q. I can neither map shared disks nor see other computers in my network neighbourhood, although I can successfully ping them, what should I do?

First of all, please be sure to share a folder in the other PCs because some Ms-Windows boxes cannot be seen in the network neighbourhood unless their folders/printers are shared.

If your target PC is in the same LAN, i.e. they are connected to the LAN ports of the same Vigor box.

1. Please use 'Find Computer' to search for the target PC instead of browsing for it in the network neighbourhood
2. If personal firewall is installed (e.g. Zone Alarm), please enable the NetBIOS passthrough option.

IF your target PC is in the remote LAN via ISDN or VPN, you're suggested to follow any of three solutions.

1. In the 'Network Neighbourhood, search another PC using its IP address instead of it NetBIOS name.
2. Modify the content of lmhosts:
   • Search the 'lmhosts.sam' file in your PC.
   • Rename 'lmhosts.sam' as 'lmhosts' (no file extension).
   • Follow the example in the lmhosts file to add a line like "192.168.5.38 DrayTek" where the actual values depends on your network environment.
3. Setup WINS servers at both sides.
4. Next if personal firewall is installed (e.g. Zone Alarm), please enable the NetBIOS passthrough option. Then please use "Find Computer" to search for the target PC instead of browsing for it in the network neighbourhood

Q. How can I find my router's uplink port

"Some computer shop sellers told me in order to upgrade, I have to find uplink in LAN ports of my modem. "

Quick answer is that all the LAN ports on all Draytek Vigor models auto-detect the LAN connection ... so any of the P1-P4 ports can act as uplink. Similarly you don't need to worry about using "straight-through" or "crossover" cables ... The DrayTeks auto-detect this as well.

For background...

LAN ports use separate wires for sending and receiving data, in the same way that your telephone has separate wires going to your earpiece (speaker) and from the mouthpiece (microphone). These wires need to be crossed over, so that your voice going into the microphone of your phone comes out of the speaker of the person you are calling.

This crossing over is normally done at the telephone exchange; or the switch (or hub) part of your router (the P1-P4 ports). This works great where you're connecting computers directly to a switch using standard 'straight-through' cables. If you're connecting two PCs or two switches together, it gets more difficult.

LAN switch devices generally provide an 'uplink' port, which is a regular port without the wires crossed over ... so you plug a straight=through cable into the uplink port of one router, and into any of the oter ports of the other router (so that there is only ove cross-over. The uplink port is sometimes referred to as "MDI" and the cross-over port as "MDI-X".

When connecting two PCs there is no cross-over, and the cheapest and easiest solution is to purchase a 'cross-over' cable.

As mentioned above, all LAN ports of all DrayTek Vigor routers will auto-sense; allowing you to use straight-through or crossover cables to connect to any device.

Q. From Vigor router's LAN subnet, why does "Trace Route" not function in a Linux system although it works normally from a Win2k box?

In the Linux system, the Trace Route function unitises UDP packets that are blocked by Vigor routers for security concerns. Therefore, please kindly use the following command.

root#traceroute - I 168.95.1.1 (or other public IPs.) in the Linux systems.

Q. How could I get the telnet command for routers?

Please download this file.