In one embodiment, a primary tunnel is established from a head-end node to a destination along a path including one or more protected network elements for which a fast reroute path is available to pass traffic around the one or more network elements in the event of their failure. A first path quality measures path quality prior to failure of the one or more protected network elements. A second path quality measures path quality subsequent to failure of the one or more protected network elements, while the fast reroute path is being used to pass traffic of the primary tunnel. A determination is made whether to reestablish the primary tunnel over a new path that does not include the one or more failed protected network elements, or to continue to utilize the path with the fast reroute path, in response to a difference between the first path quality and the second path quality.

Exemplary methods at a content centric networking (CCN) gateway located at an autonomous system (AS), wherein the CCN gateway is communicatively coupled to a CCN domain name system (DNS) server, include receiving, on a first face, a first interest message comprising of a first content name identifying a first content being requested by the first interest message. The methods include in response to determining the first content is not located at the AS, determining a first remote AS name that identifies a first remote AS where the first content is located, generating a first 2-level (2L) content name comprising of the first remote AS name and the first content name, forwarding the first interest message comprising of the first 2L content name, and in response to receiving a first content object (CO) message comprising of the first 2L content name and the first content, forwarding the first content.

The present disclosure describes techniques for hardware acceleration for routing programs. In some aspects communications between a routing determination program and a packet router are monitored in a router, both the routing determination program and the packet router being part of a software layer of the router. The communications include the routing determination program providing configuration data to the packet router. Based on the monitored communications, a packet processor is changed to reflect the configuration data, the packet processor being part of a hardware layer of the router. The packet processor performs packet routing operations of receiving packets, determining the next routers in the paths to the target destinations of the packets, and sending the packets to the next routers independent of the software layer.

An apparatus comprising at least one receiver configured to receive a traffic flow, receive information comprising a set of functions and an order of the set from a controller, and a processor coupled to the at least one receiver and configured to assign the traffic flow to one or more resources, determine a processing schedule for the traffic flow, and process the traffic flow by the set of functions, following the order of the set, using the one or more resources, and according to the processing schedule.

Techniques are described for enhancements to Protocol Independent Multicast (PIM) to enable a last hop router (LHR) to perform source discovery and directly build or join a source tree. According to the techniques of this disclosure, the LHR builds a communication channel with a rendezvous point (RP) router and requests source information for at least one multicast group for which the LHR has interested receivers. The RP responds to the request by looking into a register database maintained by the RP and sending source information indicating at least one source that is actively providing traffic for the at least one multicast group. Based on the response, the LHR initiates a (S,G) PIM Join message toward the at least one source for the at least one multicast group to directly build or join at least one source tree.

Techniques are presented herein for distributing address information of host devices in a network. At a first router device, a packet is received from a first host device that is destined for a second host device. The first host device is dually-connected to the first router and a second router device. The second router device is part of a virtual port channel pair with the first router device. A message is sent to the second router device, the message indicating that the first host device is connected to the second router device. The packet is encapsulated with an overlay header and is sent to a third router device that is connected to the second host device. The encapsulated packet contains a Layer 2 address associated with the first host device and a Layer 3 address associated with the first host device.

Disclosed are a method, device, and computer storage medium for implementing IP address advertisement. An advertisement for controlling LSA11 and an advertisement control switch for flooding are added into a router. The router performs, according to a state indicated by the advertisement control switch, IP address advertisement or flooding for LSA11 encapsulated with an IP address.

The embodiments described herein provide mechanism that allows an embedded router software image and an application to run in the user application memory space of a general purpose computer. A connection is established with an operating system device configured to route packets between the application and the software router and route, by the software router, network traffic to and from the application by way of the connection. The application may be connected to other applications in the user application memory space or connected to applications that are external to the general purpose computer.

A system provisions global logical entities that facilitate the operation of logical networks that span two or more datacenters. These global logical entities include global logical switches that provide L2 switching as well as global routers that provide L3 routing among network nodes in multiple datacenters. The global logical entities operate along side local logical entities that are for operating logical networks that are local within a datacenter.

Methods and apparatus for processing data packets in a computer network are described. One general method includes receiving a data packet; examining the data packet to classify the data packet including classifying the data packet as a L2 or L3 packet and including determining at least one zone associated with the packet; processing the packet in accordance with one or more policies associated with the zone; determining forwarding information associated with the data packet; and if one or more policies permit, forwarding the data packet toward an intended destination using the forwarding information.