Wonky Ping (ping don't work)

[Chris Plasun]

So about 30 minutes ago, while writing a reply to a post at 
LinuxQuestions everything started working again, or at least 
I could ping to and from the board.

I just ran DHCP and the problem came back. I can access 
external addresses but not internal. This time I can access 
the DNS servers, but not the gateway (???). Can't ping the 
board from my winbox.

> First off, "SIOCDELRT", just looking at it what do you think it means?
> We generally try to make error strings like that make some sort of
> sense.

Yes. That's what I figured. Also, right above that DHCP line 
it says "deleting routers" =)

I thought perhaps it had to do something with not being able to 
reach the router/gateway, though that's where DHCP runs...


> So I answer the SIOCDELRT thing above.  Also I didn't try this but did
> you try to google it and see if anyone had any true insight on this?

Yes, and I didn't find anything relevant, so I left it for later, as it 
didn't seem to be a problem.

> Also you'll note that the DHCP Response from your DHCP server told us
> to add 64.59.144.18 and 19 as our dns servers.  So we did it.  Whether
> they are up or not is not our problem, it's the network admins
> problem.

They're up, and this time, with the problem back, I can still ping them, and anything else outside.

> >> > The problem is that I can't ping anything on the local network, either
> >> > at home or at work.
> >> >
> 
> Ok, so you gave me nothing to work with here.  All I know from what
> you have told me is that the MPC board has an ip address of
> 192.168.1.207.  I would assume the subnet mask is 255.255.255.0.
> 
> What is the ip address of your PC's??
> 
> >> > And I can't ping the board with my PC.
> >> >
> >> > I tried another board that hasn't been worked on before and same issue
> >> > again.
> >> >
> >> > Last week the board, PC and the virtual Suse machine were pinging each
> >> > other back and forth.
> >> >
> >> > I can however ping outside the network. I've tried www.asp.net,
> >> > yahoo.com, spiegel.de and google.com and those work fine.
> >> >
> >> > msn.com and microsoft.com fail, though the IP address is resolved.
> 
> Whoa there tiger.  So what this tells me is a not alot.  First off,
> how are you getting from your board to the outside internet?  Is there
> a NAT server somewhere?  Because the 192 address most certainly is NOT
> on the internet.
> 
> So why you can resolve IP addresses and not get pings back from some
> sites is very strange.
> 
> And this also tells me that ping IS indeed working and it's your local
> network that's busted.
> 
> Again, wireshark is your friend here.
> 
> >> >
> >> > I can't ping one of the DNS servers.
> >> >
> 
> Not a big deal.  This is why you usually get two DNS servers.  They go
> up and down all the time.  At least mine do.. but then again, our IT
> dept. here is not what I would call stellar.
> 
> >> > I've been read and asking various people but I can't figure out what's
> >> > wrong.
> >> >
> >> > How do I diagnose this?
> >> >
> 
> Wireshark, wireshark, wireshark.  Put it everywhere in your network
> and find out where the packets are going...
> 
> Hope this helps.  Let me know if you need more help and I'll do my
> best time if I have time.
> 
> -stv