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Showing posts from October, 2019

CDO Mode in NSX Controller

CDO  ( Controller disconnect operation) Mode in NSX Controller.


CDO mode ensures that the data plane connectivity in the multisite environment. When primary site loses connectivity. Here you can enable CDO mode on secondary site to avoid any temporary connectivity issue related to data plane. 

When the primary site is down or not reachable, the CDO logical switch is used only for control plane. Purpose and therefore its a not visible under logical switches tab.


About VTEP Reports

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



MAC 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.



ARP Table:


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 reques…