Routing issue with a PowerConnect 6248

Hi there board,

 

We have recently purchased a Dell 6248 switch to replace an aged 3Com 4900 layer 3 switch.

This switch is intented to route traffic between the diffent sub-nets we have.

I have manages to solve routing issues up to a point that traffic is routed between te different sub-nets/VLANs we have. Only problem remaining is that a workstation in one of the sub-nets can no longer reach a switch which has an IP in the default vlan.

 

This is not a problem for the the 6248 itself since it can be reached trough one of the IPs assigned to its VLANs, but it does make other switches who have IPs in the same subnet as the 6248 invisible.

 

Here is what I have done and tested:

 

I assigned the switch an IP: 10.0.0.5 /16 (no gateway)

I created some VLANs: 2 and 4 for testing purposes

I assigned IPs to the VLANs: 10.2.0.1/16 for VLAN 2 and 10.4.0.1/16 for VLAN 4

I placed an uplink port to another swich in general mode and added the VLANs 1, 2 and 4 tagged

I enabled global routing.

 

On the switch itself I can now ping all IPs: 10.0.0.5, 10.2.0.1 and 10.4.0.1

I can even ping the other switch on its IP 10.0.9.41 (same subnet as the 6248)

 

After I place a port in access mode, vlan 2, and connect a workstation to it with IP 10.2.0.6 I can even ping that address from the switch

 

From the workstation I can ping 10.2.0.1. I can even ping outside its sub-net to 10.4.0.1. But I cannot ping 10.0.0.5 (the 6248) nor can I ping 10.0.9.41 (the connected switch)

 

Pinging 10.0.0.5 results in time outs

Pinging 10.0.9.41 result in a reply from 10.2.0.1 that that network cannot be reached.

I fail to understand te reason for this.

 

Since the 6248 itself should function as a gateway (at least for this test) I did not give it a default gateway. For testing purposed I did give it a gw: 10.0.0.5. But without result

 

Summing the routes gives me 2 locally connected networks for VLANs 2 and 4. There is no route for VLAN 1

 

My local Dell guru could not resolf this issue.... his knowledge does not go beyond layer 2 capabilities... and I am currently waiting to be contacted by a third party contracter to enlighten me.

 

Hope you guys can help me resolve this issue... it has been bugging me for some time now.

 

If you need detail.... session transcipts or such... do not hesitate to as... only problem is that I cannot reach my laptop connected to that switch atm ;)

 

regards

 

Peter