By building OSPF networks, you can enable OSPF to discover and calculate routes in an AS. OSPF is applicable to large-scale networks with hundreds of routers.
This section describes how to configure OSPF and modify attributes on the NBMA or point-to-multipoint (P2MP) network to flexibly construct the OSPF network.
OSPF neighbor relationship flapping suppression works by delaying OSPF neighbor relationship reestablishment or setting the link cost to the maximum value.
Configuring a non-backbone area as a stub area can reduce routing entries in the area in an AS does not transmit routes learned from other areas in the AS or AS external routes. This reduces bandwidth and storage resource consumption.
Configuring a non-backbone area on the border of an AS as an NSSA can reduce entries in the routing table and the amount of routing information to be transmitted. This section describes how to set the cost of the default route to an NSSA and adjust the selection of the default route.
By configuring local multicast topology (MT), you can create a routing table for multicast traffic when multicast and a Multiprotocol Label Switching (MPLS) traffic engineering (TE) tunnel are configured on a network.
This section describes how to configure an OSPF sham link so that traffic between sites of the same VPN in the same OSPF area is forwarded through the OSPF intra-area route over the BGP/MPLS IP VPN backbone network.
After BFD for OSPF is enabled, if a link fails, the router rapidly detects the failure, notifies the OSPF process or interface of the fault, and instructs OSPF to recalculate routes. This speeds up OSPF network convergence.
You can configure whitelist session-CAR for OSPF to isolate bandwidth resources by session for OSPF packets. This configuration prevents bandwidth preemption among OSPF sessions in the case of a traffic burst.