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SP0009 - MPLS VPN PE-CE with OSPF (Part 1)

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The video demonstrates configuration of OSPF as PE-CE routing protocol in Cisco MPLS VPN. In addition to basic OSPF configuration, we will go through more advance scenarios of dualed-home site and sites with a backdoor link, and try to understand how a use of Sham Link can prevent a backdoor link from being preferred over MPLS, and how Down-Bit and how Domain Tag can prevent learnt routes from being re-advertised out of the site. We will also look at the Domain ID and the affect that it has on OSPF LSA type.
Part 1 of this video goes over basic OSPF configuration on PE and CE routers
  • OSPF Basic Configuration
  • OSPF metric in VPNv4 routes
  • Domain ID
  • Sham Link
  • Down-Bit and Domain Tag

About Author

Metha Cheiwanichakorn, CCIE#23585 (RS, Sec, SP), is a Cisco networking enthusiast with years of experience in the industry. He is currently working as a consulting engineer for a Cisco partner. As a founder of and an instructor at, Metha enjoys learning and challenges himself with new Cisco technologies.