Check ospf peer on CE, if the tag for the peer is 1. Checking on the PE, the tag for this ospf peer should be 1 too. If OSPF VPN multi-instance is deployed on a Multi-VPN-Instance CE (MCE), routes cannot be calculated based on Type3, Type5 or Type7 LSAs with the DN bit. Therefore, OSPF detects routing loops when calculating routes. ====================================================== If OSPF VPN multi-instance is deployed on a Multi-VPN-Instance CE (MCE), routes cannot be calculated based on Type3, Type5, or Type7 LSAs with the DN bit. Therefore, OSPF detects routing loops when calculating routes. In this case, the vpn-instance-capability simple command is used to disable OSPF routing loop detection and enable OSPF to calculate routes based on received LSAs without checking the DN bit and route-tag in the LSAs. The route-tag is restored to the default value 1. |