Floating Static Routes are preferred to OSPF Dynamic Routes

Products

• VMware NSX

Issue/Introduction

Symptoms:
A backup Floating Static Route is incorrectly entered into an Edges routing table when Route Redistribution is enabled even though an OSPF Route is available.

Cause

Static routes by default have an Administrative Distance of 1. NSX 6.2.x added the functionality to configure Administrative Distance for static routes.

A floating static route is a backup route which has an Administrative Distance greater than the Administrative Distance of the primary route.
These floating routes is only selected for the routing table when the primary route is unavailable. It is found that when route redistribution is enabled for static routes on an Edge, backup floating static routes are incorrectly preferred to OSPF dynamic routes. The floating routes enters the routing table.

Resolution

This issue is resolved in VMware NSX for vSphere 6.3.0, available at VMware Downloads.

To work around this issue if you do not want to upgrade, disable the route redistribution of Static into OSPF.

Note: This issue does not impact the data path.