[PLUG] Bizarre network problem

[Fedor Pikus]

On 9/5/07, Bill Barry <bill at billbarry.org> wrote:
> On 9/5/07, Fedor Pikus <fpikus at gmail.com> wrote:
> >
> > I ran into a very strange network problem. I was setting up a wireless
> > bridge (I don't think the "wireless" part is important), so there is
> > what I have:
> >
> > Wireless bridge - 192.168.1.37
> > Bridge is connected to a switch, into the switch I plug these:
> > PC - 192.168.1.16
> > Tivo - 192.168.1.25
> > Laptop - 192.168.1.241
> >
> > >From the laptop, I can ping PC, Tivo, and the bridge, so everything on
> > the wired part is connected.
> > >From the PC, I can ping laptop and Tivo but not bridge. The difference
> > seems to be in arp requests. When I ping bridge from laptop, tcpdump
> > shows this:
> >
> > arp who-has 192.168.1.37 tell 192.168.1.241
> > arp reply 192.168.1.37 is-at 00:18:02:74:94:35
> >
> > When I ping bridge from PC, tcpdump shows repeated who-has line but
> > the reply never comes.
> >
> > They are all connected into the same switch (wired), they are all on
> > the same net, they use the same network and mask
> > 192.168.0.0/255.255.0.0, why one works and one doesn't?
> >
> >
> Maybe there is something wrong with the switch between the bridge and the pc
> so the bridge is not getting the arp who-has. Try moving things around on
> the switch.

I already replaced the switch, makes no difference.

-- 
Fedor G Pikus (fpikus at gmail.com)
http://www.pikus.net
http://wild-light.com