Greetings all,
I've stumbled upon strange behavior of a DLR router on one installation (NSX v.6.3). Long story short, although it operates as router and routes packets between internal networks with no issues detected, it seems to be unable to complete ARP requests for himself.
What is working:
1. Routing between internal networks: VMs from one Logical Switch can ping VMs in other Logical Switch, with gateway interfaces for each network being on the affected DLR.
2. VMs can ping affected router's interface IPs.
3. EDGE router, that is a default gateway for the affected DLR,can ping DLR's IP on the interface in the Interconnect network (separate Logical Switch).
4. Separate interface on EDGE router, created for testing purposes only, connected to one of the intenal networks can ping VMs in corresponding Logical Switch.
What is not working:
1. DLR cannot ping its default gateway (EDGE router).
2. DLR cannot ping VMs mentioned above.
3. DLR cannot DHCP Relay.
4. DLR cannot participate is OSPF with EDGE router.
5. When I run 'show apr' on DLR control VM, the result is empty - there are no ARP entries.
Firewalls are disabled for now. So, it seems to me that the problem is that the DLR cannot complete ARP requests for his own OS - not the routing part (as it would affect communications between networks, which is not the case).
Can anybody help identify the problem here?