NSX VTEP Reports
NSX Controller VXLAN directory services. There are basically 3 types of tables under VTEP
1) MAC Table
2) ARP Table
3) VTEP Table
- The MAC table includes the VNI, the MAC address and VTEP ID that reported it.
- If a unknown unicast frame is reviewed by a VTEP. The VTEP sends a MAC table request to NSX Controller for a destination MAC address.
- If NSX controller has the MAC address in the MAC table, it replies to the VTEP with information on where to forward the frame.
- If NSX controller does not have MAC address in the MAC table then the VTEP floods the frame to other VTEP's.
- The ARP table used to suppress the broadcast traffic.
- IP report generate the ARP Table. The VTEP's send a copy to each MAC address and IP mapping that they have. This report is called the IP reports.
- NSX controller creates a ARP table with the information in the IP request.
- The ARP table includes the MAC to IP addrEss mapping and VTEP IP that reported it.
- The VTEP intercepts all APR request from VM.
- If the VTEP does not have the MAC address in its local ARP table, then VTEP queries the NSX controller instance from the information.
- If the NSX controller instance does not have MAC address in the ARP, then ESXi host (VTEP) broadcast the frame to all virtual machine in the same VNI that are running in the VTEP and to all other VTEP in same VNI.
- The function of VTEP table is to track all its VTEP's IP's, and VTEP MAC address via VNI.
- The ESXi host updates its local VTEP and its send report to NSX Controller with this information.
- NSX controller then pushes out the VTEP table to all hosts for the related VNI via the UWA.
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