- Written by Sulyab Thottungal Valapu
- Posted on October 29, 2020
- Updated on October 17, 2024
- 8353 Views
This document describes the OSPFv2 and OSPFv3 feature that allows enabling or disabling the inclusion of LSAs having “Down” (DN) bit set in SPF calculations. The DN Bit is a loop prevention mechanism implemented when OSPF is used as CE - PE IGP protocol.