Network question

[Sundiver]

Okay, here's the situation:

I just setup a new network on a 10/100 5 port switch. Whole network works fine, all comps can access the internet and be seen from the internet.

However, no computer on the network can ping or reach any other computer on the network in any fashion. It's as if they didn't exits to one another.

Any ideas?

PS: They're all using static IP's

[AKDogg]

File/printing sharing not turned on each drive for each computer?

I had same problem till I turned on file sharing.

[Skuzzy]

Static IP's in the same subnet?

[Sundiver]

Originally posted by Skuzzy
Static IP's in the same subnet?

Skuzzy, they're all in the 64.81.116.x range with a 255.255.255.0 netmask.

[SLO]

Originally posted by MwDogg
File/printing sharing not turned on each drive for each computer?

I had same problem till I turned on file sharing.

sounds like this is your answer

[Sundiver]

Originally posted by SLO
sounds like this is your answer

Nah, File and Printer sharing is on both windows comp. The third box is a linux box so that's not even relevant.

Like I said all three boxes can see and be seen by the outside world fine. I can't even ping a box using their static, (real world) Ip's but other's can ping them fine.

I thought it might be the switch but if pinging them using their static ip's the ping would have to travel at least as far as the gateway to do so, which should make it coming in from the outside?

[Schutt]

Did you get the static ip adresses from your provider?

To me it sounds like the adresses are used double.... are you sure you ping your computer from the internet and not some other comp?

BTW i had a similar problem with a cheap switch... maybe try a diffrent hub or switch from a friend.

I take it you have a gateway in that subnetz and that gateway is pingable from all your clients?

[Skuzzy]

I take it you are getting those IP addresses from your ISP, which means your ISP is responsible for the routing.  If this is not the case, then the following will not hold true.

However, is your switch managed or unmanaged?  If managed, you should be able to setup the LAN IP subnet so the switch knows it does not need to forward packets destined for the LAN.
If your switch is unmanaged, then you are stuck.  Your ISP can configure to not deal with packets destined for the local subnet you have.
Which brings up another question.  Are you sure your ISP is giving you a full Class C?  If the subnets do not match what the ISP is routing, then this could cause packets originating from the LAN not to be sent back to the LAN.

[StarOfAfrica2]

Are  you  using a Linksys router by any chance, and if so did you use the setup software that came with it to configure your computers for the network?

[Sundiver]

Originally posted by StarOfAfrica2
Are  you  using a Linksys router by any chance, and if so did you use the setup software that came with it to configure your computers for the network?

No, like I said it's a 10/100 switch.

It probably is the switch, I'll replace it tomorrow and see if that solves the problem. I'm running full class C addy's.

[Skuzzy]

Sundiver, did your ISP grant you a full Class C?  I find that very, very unusual.

[g00b]

Just a wierd anecdote.

Speakeasy gives random ip's within a class C, no contiguous blocks, and has you setup a 255.255.255.0 subnet. Works great unless you happen to want to access one of the other address' in your subnet but it's not on you lan. Not that it's ever been an issue.


Just in case I wasn't clear, here's an example.

They assign you 6 IP's (I'm just using these IP's as an example).

192.168.1.7
192.168.1.28
192.168.1.49
192.168.1.184
192.168.1.187
192.168.1.204

and a 255.255.255.0 subnet.

Wierd but I guess it works for the most part.

g00b

[Skuzzy]

192.168's are phoney IP addresses not routable over the Internet.  Just as 10.x.x.x addresses are.

That arrangement makes sense, but Sund's IP addresses are real addresses.  Big difference.  ISP's do not hand those real IP addresses out like candy.  If there is an ISP doing that, they are simply ignorant.

[g00b]

Skuzzy, speakeasy assigns real routable IP's I just used the 192's for an example.

g00b

[Sundiver]

Skuzzy,  for sake of clarification what IS a full class C address?

Just as an example, one of the three is:

64.81.116.200

I have two others beneath that range. No they don't give them away you have to buy them.

PS: My subnet is 255.255.255.0