Ridiculous behaviour on Dell L3-Switch (N4048)

This drives me crazy at work at the moment, I have wasted waay to much time on it. My routing Table looks like this:

Route Codes: R - RIP Derived, O - OSPF Derived, C - 
Connected, K - Kernel, S - Static
   B - BGP Derived, E - Externally Derived, IA - OSPF Inter Area
   E1 - OSPF External Type 1, E2 - OSPF External Type 2
   N1 - OSPF NSSA External Type 1, N2 - OSPF NSSA External 
Type 2
   S U - Unnumbered Peer, L - Leaked Route, T - Truncated 
ECMP Route
* Indicates the best (lowest metric) route for the subnet.

No default gateway is configured.
C      * [0/0] directly connected,   Vl2
C      * [0/0] directly connected,   Vl4

however, if I run a traceroute from the switch to another device, I get the following:


Traceroute to ,30 hops max 0 byte packets:

1            *         *         *
2            *         *

Hop Count = 2 Last TTL = 2 Test attempt = 5 Test Success = 0

Does anyone have a clue on what is going on? Pinging the Gateway or even the Gateway to the other VLAN from a Computer connected to the switch works fine, but they can’t ping each other either…
They are connected to those Interfaces:

interface Gi1/0/2
switchport access vlan 4
interface Gi1/0/46
switchport access vlan 2