Hi all,

I'm trying to set a simple architecture around a hub (isolated network with no switch or router). 3 stations are there: 2 Windows and 1 Linux, in the same subnet. The Linux station and 1 Windows station have their single network adapter set to VLAN 3. The other Windows station is there only to sniff traffic using Ethereal in promescuous mode.
When Windows pings Linux, I can see tagged arp requests and resoponses but the Windows station concludes timeout as it were not receiving those packets. When Linux pings Windows, I see outgoing tagged arp packets but nothing back from Windows station.
Then, I used the arp -s command in order to provide them the IP of each MAC.
Result: the same behavior except that, this, time, it is ICMP that is exchanged.

Could someone explain me what is happening over here?


Thanks a lot.

czohair

I'm not sure but it could have something to do w/ asynchronous versus synchronous modes.

You can't do vlans with a hub.

It takes a managed switch with vlan support to do vlans.

Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

don2006 and wanderer: thanks for your responses.

wanderer: with Ethereal, I could see ping replies going from one station to another. I guess a switch has nothing else to do but to route packets to a destination, I mean it will not write/remove tags. So, the effect is the same, whether I have a hub managing a single subnet or a switch knowing where exactly to route packets.

czohair

What wanderer was pointing out to you (correctly I might add) is that you cannot VLAN with a hub or basic switch. Ergo, you're not VLAN'ing on your network.

As far as pinging back and forth goes, you don't require a VLAN for that, just a hub,switch or router and two PC's connected to one of the aforementioned devices.

Side note: switches don't "route" packets, routers do. In all honesty, I think you need to do more research/reading on routers, switches, VLAN's and networking in general as you seemed confused about basic concepts. You need to thoroughly understand the basics before trying VLAN'ing or any other more in-depth networking.

Couldn't of said it better myself CurtR

Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.