[PLUG] Routers again <sigh>

[Larry Brigman]

On 4/12/07, John Jason Jordan <johnxj at comcast.net> wrote:
> To recap old history, my Linksys router died. I replaced it with a
> D-Link from Free Geek. The Linksys had five ports on the back, one
> labeled Modem, and the others numbered 1-4. The new D-Link is the same,
> except that the one marked Modem on the Linksys is marked WAN on the
> D-Link. The cable modem is in the WAN port on the new D-Link. There is
> also a cable going from 1 on the router to a separate 8-port switch.
> Cables from the switch go to my three computers and two laser
> printers. This is also how my Linksys was cabled, and everything always
> worked.
>
> Now, with the new D-Link all three computers can go to the internet
> without a problem. But none of the computers can talk to either laser
> printer.
>
> The laser printers are 192.168.1.4 and 192.168.1.24. When I turn each
> one on the corresponding light on the front of the switch lights up. So
> the wiring is still connected.
>
> If I try to print to either one the print job just sits in the queue in
> CUPS. Ditto for trying to print a test page. If I ping the printers
> from the Edgy laptop I get:
>
> jjj at Devil5:~$ ping 192.168.1.4
> PING 192.168.1.4 (192.168.1.4) 56(84) bytes of data.
> >From 192.168.1.3 icmp_seq=2 Destination Host Unreachable
>
> >From the Fedora 7 test2 desktop I get
>
> [jjj at localhost -]$ ping 192.168.1.4
> PING 192.168.1.4 (192.168.1.4) 56(84) bytes of data.
>         and then the ping command just hangs
>
> While testing I have Firestarter on the laptop and the firewall and
> SELinux on the Fedora desktop all disabled.
>
> My first question is, what does this line mean?
>
> >From 192.168.1.3 icmp_seq=2 Destination Host Unreachable
>
> And consider that 192.168.1.3 is the Windows 2000 desktop. It is turned
> off, as it usually is. However, with the cable connecting its ethernet
> card to the switch plugged in, the light on the switch is on. How can
> that be if the computer is turned off? And I can ping the Windows
> deslktop  from the Ubuntu laptop and get a response, even if the
> Windows desktop is turned off, but from the Fedora 7 desktop the ping
> just hangs.
>
> Summary: The D-Link is wired exactly the same as the old Linksys was
> wired. With the Linksys any computer could print to either printer
> whether it was the only computer turned on or if all the computers were
> running. Now nothing can talk to the printers. The only thing that is
> different in the mix is the D-Link router. Therefore, that is where the
> problem must lie. But what could it be?
>

The computer with the nic connection on when the computer is off has remote
power on enabled in the BIOS to allow remote admin update.  This is a
feature that
most motherboards have now.

Were the printers configured for DHCP?  The new router might have
re-assigned them.
Have you checked the router page for known hosts/MACs?
Can you ping the other computers?
Have you tried
ping -b 192.168.1.0 from one of your Linux boxes?