Methods and systems for service integrated domain name servers are described. A method for out of path border gateway protocol (BGP) validation includes receiving, at a network component, a prefix announcement. The network component denies acceptance of the prefix announcement. A BGP monitor at the network component sends the prefix announcement to an out of path validation controller. The out of path validation controller evaluates the prefix announcement against one or more validation tests, sends a validation notification based on the one or more validation tests, and programs the network component for a validated prefix announcement.

Systems and methods for selectively advertising routing information by a network appliance to a neighboring computing device are disclosed. In exemplary embodiments, customized export policies are created based on source type for each neighboring computing device to a network appliance. A source type for routing information is determined by the network appliance. The routing information is exported by the appliance to the neighboring computing device, such as a BGP router, based on the customized export policy associated with the source type.

Methods and systems are described for automatically detecting network routing peers and establishing route peering sessions. An illustrative method includes retrieving, at a network router, route peer configuration for the network router. The route peer configuration identifies one or more network interfaces for route peering but typically does not identify an address of peer routers. The method identifies, based on the route peer configuration, a network interface from a plurality of network interfaces of the network router for route peering and configures the network interface to participate in route peering. The method then detects a peer router on the network interface and initiates a peering session on the network interface with the peer router. Using the peering session, the method exchange route information with the peer router.

A routing system for distributing multicast routing information for a multicast service includes a plurality of routers including a multicast source router and a plurality of multicast receiver routers, the plurality of routers providing a multicast service, wherein the routers are configured to exchange multicast information associated with the multicast service including identification of multicast sources and the multicast receivers.

The disclosure disclosures a blockchain-based verifiable inter-domain routing validation method, which includes: constructing a blockchain-based verifiable inter-domain routing system consisting of a verifiable inter-domain routing and a routing behavior validation subsystem; constructing, by a sender router R1, a routing behavior validation terminal of an autonomous domain to which the R1 belongs, and the routing validation blockchain system, a routing evidence and a routing evidence validation proposal, validating and endorsing the proposal, determining whether the proposal satisfies an endorsement policy, generating a routing evidence transaction, conducting consensus ordering on the transaction and updating a routing validation blockchain; and constructing, by a receiver router T, a routing behavior validation terminal of an autonomous domain to which the T belongs, and the routing validation blockchain system, a routing request validation message and retrieving whether a routing evidence corresponding to the routing request exists.

Systems and methods provide for provisioning a dynamic intent-based firewall. A network controller can generate a master route table for network segments reachable from edge network devices managed by the controller. The controller can receive zone definition information mapping the network segments into zones and Zone-based Firewall (ZFW) policies to apply to traffic between a source and destination zone specified by each ZFW policy. The controller can evaluate a ZFW policy to determine first edge network devices that can reach first network segments mapped to the source zone specified by the ZFW policy, second edge network devices that can reach second network segments mapped to the destination zone specified by the ZFW policy, and routing information (from the route table) between the first network segments, the first and second edge network devices, and the second network segments. The controller can transmit the routing information to the edge network devices.

A traffic controller device for distributing or otherwise controlling the distribution of routing information may be included in a telecommunications network. The traffic controller may receive routing tables from a plurality of network devices, such as one or more provider edge devices of the network. The traffic controller, upon receiving the routing information from the provider edge devices, may generate a routing table associated with each device providing the routing information. The traffic controller may also provide updates to one or more of the networking devices associated with the controller. The traffic controller may alter or update, at the traffic controller, the routing table associated with the target provider edge device based on the network policy. The routing information in the routing table for that device and maintained by the traffic controller may be updated with a new route or new local preferred parameter value.

This disclosure describes techniques for improving speed of network convergence after node failure. In one example, a method includes storing, by SDN controller, an underlay routing table having routes for an underlay network of a data center and an overlay routing table having a set of routes for a virtual network of an overlay network for the data center, wherein the underlay network includes physical network switches, gateway routers, and a set of virtual routers executing on respective compute nodes of the data center; installing, within the underlay routing table, a route to a destination address assigned to a particular one of the virtual routers as an indicator of a reachability status to the particular virtual router in the underlay network. The SDN controller controls, based on presence or absence of the route within the underlay routing table, advertisement of the routes for the virtual network of the overlay network.

A routing system can provide a Dynamic-Hybrid Forwarding Information Base (DHFIB). A control component of the routing system can build a routing table that includes routing information (e.g., prefixes, addresses, etc.) for use by a first routing component. The routing table can be ordered or ranked based on traffic information from the first routing component. Then, the control component can create the DHFIB from the routing table, wherein the DHFIB is a portion of the routing table and related to the first routing component. As such, the portion of the routing table selected for the DHFIB can be the set of prefixes in the routing table that represent the most frequently routed or most important prefixes in the routing table. Finally, the control component can forward the DHFIB to the first routing component to allow the routing component to route communications.

In various embodiments, a method and apparatus are configured to receive information associated with a path from a first node to a second node; and generate a set of one or more segment identifiers at least one of which is in an address space having a span in a current region in which the first node resides, and is configured for use in identifying a next region, wherein the set of one or more segment identifiers encodes the path.