Nov 18 2008
OSPF Sham-Links
OSPF sham-links give the technical administrator an option to use either the back door link or the WAN link by presenting Type 1 LSAs over the WAN cloud. CEs then have Type 1 LSAs via 2 routes and as they are the same type of LSA you can manipulate the cost to either use the back door or the WAN link.
