I am glad to hear the routing has started to work. I agree, it does seem peculiar that would not be working one day and then working the next. Were any devices removed or added to the network between the two days? Or any small changes to config? To delete a current config you issue clear config [URL] The latest firmware is 9.3.0.0. Which provides some overall improvements and would be worth calling in and getting updated. iSupport Portal (Web): [URL] E-mail: Dell-Force10_Technical_Support[NAME].com Telephone (US and Canada): 866-965-5800 Telephone (International): +1-408-965-5800 Then monitor to see if the issue comes back up again.  
I am trying to configure a simple layer3 setup on stacked Force10 MXL switches. ManagementEthernet 0/0   90.21.0.175     YES Manual up                    upVlan 33                   10.1.33.1             YES Manual up                    upVlan 101                 10.1.32.1             YES Manual up                    upVlan 103                 192.168.103.1   YES Manual up                    up MXL-Stack#sho vlanQ: U - Untagged, T - Tagged    NUM    Status    Description                          Q Ports*   1      Active                                                        U Te 0/3-6,11-14,17-23,25-32                                                                               U Te 1/3-6,11-14,16-23,25-31    33     Active    eenet                                         U Te 1/15                                     <==10.1.33.10     101    Active    Production Network              T Te 0/1-2,7-8,15-16,24,44     <==10.1.33.x hosts                                                                               T Te 1/8,24,32                                            103    Active    External        Network            T Te 0/8,16,24                           <==192.168.103.x hosts                                                                               T Te 1/1-2,8,24,32                                                                               U Te 1/7MXL-Stack#sho ip route       Destination                      Gateway                      Dist/Metric Last Change       -----------                          -------                                ----------- -----------  C    10.1.32.0/24              Direct, Vl 101                        0/0        3d2h  C    10.1.33.0/24              Direct, Vl 33                          0/0    00:13:51  C    192.168.103.0/24     Direct, Vl 103                       0/0        3d1h From the MXL Switch StackPing                            Result        Message192.168.103.13        Fail10.1.32.21                 Success10.1.33.10                 SuccessFrom 192.168.103.13 - default gateway is 192.168.103.1Ping                               Result        Message192.168.103.1             Success192.168.103.11           Success10.1.32.1                      Success10.1.32.21                    Fail10.1.33.1                      Fail             - From 192.168.103.1 Destination Net UnreachableFrom 10.1.32.21 - default gateway is 10.1.32.1Ping                              Result        Message192.168.103.1            Success192.168.103.13          Fail10.1.33.1                     Success10.1.33.10                   SuccessFrom 10.1.33.10 - default gateway is 10.1.33.1Ping                          Result                            Message192.168.103.1        Success192.168.103.13      Fail10.1.32.1                 Success10.1.32.21               Success  I have my hosts on my different nets pointed to the stack for their default gateways, and I want my MXL stack to switch the packets at Layer 3 for connectivity among the subnets.  The part that stumps me is why is my vlan 103 not communicating at all?  I cannot even ping it from the MXL stack that has the vlan on it.  This ought to be the simplest thing in the world, but it is failing.  Anyone have an idea?
Force10 MXL - VLAN is not routing.