Alcatel Lucent

Provenance Asset Group LLC

Pradeep G Jain

Kanwar D Singh

Srikrishnan Venkataraman

Jayant Kotalwar

Jaishal Shah

Santoshkumar Ramamurthy

Nehal Bhau

Wim Henderickx

Praveen Vasant Muley

Prashanth Ishwar

Girish Birajdar

Sivaramakrishna Kuditipudi

Nisha Desai

Jeremy Fine

Will Lockhart

Geetha Remadevi

Geetha Rema Devi

Palak D Mehta

Sandeep Bishnoi

A system, method and apparatus providing BFD support to unnumbered IP Interfaces in MPLS networks using a newly defined interface identifier (IF-ID) sub-object included within one or more BFD protocol messages to extend the use of BFD protocol to unnumbered IP interfaces.

System, method and apparatus providing bi-directional forwarding detection support to unnumbered IP interfaces

Systems, methods, architectures and/or apparatus for reflecting information between provider equipment (PE) nodes associated with a Virtual Private LAN Service (VPLS) via a network element adapted to operate as a Forwarding Equivalence Class (FEC) Reflector (FR) node.

System and method for reflecting FEC route information

A system and method for detecting a communication status includes generating, at an originating virtual tunnel end point (VTEP), a virtual extensible local area network (VXLAN) data packet in accordance with VXLAN protocols. A bidirectional forwarding detection (BFD) data packet is encapsulated in the VXLAN data packet to provide a VXLAN BFD data packet. The VXLAN BFD data packet is transmitted to a terminating VTEP to establish a BFD session over a VXLAN tunnel. A communication status of the VXLAN tunnel is determined for the BFD session based on a reply BFD data packet received from the terminating VTEP in accordance with a receiving time interval.

Bidirectional forwarding detection over a virtual extensible local area network

A system and method for detecting a communication status includes generating, at an originating virtual tunnel end point (VTEP), a network virtualization using generic routing encapsulation (NVGRE) data packet in accordance with NVGRE protocols. A bidirectional forwarding detection (BFD) data packet is encapsulated in the NVGRE data packet to provide an NVGRE BFD data packet. The NVGRE BFD data packet is transmitted to a terminating VTEP to establish a BFD session over an NVGRE tunnel. A communication status of the NVGRE tunnel is determined for the BFD session based on a reply BFD data packet received from the terminating VTEP in accordance with a receiving time interval.

Bidirectional forwarding detection over network virtualization using generic routing encapsulation

A system, method and apparatus adapting one or more routers or nodes in a network to operate in a first mode to exchange hello messages with neighboring nodes to indicate thereby active or live status, and to operate in a second mode to avoid the use of hello messages by opportunistically relying upon service or management protocols to convey active or live status.

System and method using RSVP hello suppression for graceful restart capable neighbors

A data packet comprising a header, the header having a format associated with a Network Virtualization Using Generic Routing Encapsulation (NVGRE) technology is generated at an originating tunnel end point device in a network. A predetermined bit in a reserved portion of the header is set to a predetermined value. In one embodiment, the reserved portion comprises a Reserved0 portion of the data packet. The data packet is then transmitted.

System and method for transmitting an alert using a network virtualization using generic routing encapsulation (NVGRE) tunneling mechanism

A multicast path trace capability is provided for tracing a multicast path from a root node to a leaf node where the trace originates at the leaf node. The leaf node sends a multicast trace request to the root node. The root node receives the multicast trace request and initiates a path trace request for collecting path information associated with the multicast path. The root node receives at least one path trace response, in response to the path trace request, which includes path information associated with the multicast path. The root node sends a multicast trace response, including the collected path information, to the leaf node. The leaf node receives the multicast trace response including the path information. The leaf node derives end-to-end path information for the multicast path using the path information received in the multicast trace response. The multicast path trace capability may be used for tracing an MPLS multicast path (e.g., a P2MP LSP) from a root node to a leaf node of the MPLS multicast tree. The multicast path trace capability may be used for tracing multicast paths in other types of multicast networks.

Method and apparatus for performing multicast traces in MPLS networks

A data packet comprising a header, the header having a format associated with a Virtual Extensible LAN (VXLAN) technology is generated at an originating tunnel end point device in a network. A predetermined bit in a reserved portion of the header is set to a predetermined value. The data packet is then transmitted.

System and method for transmitting an alert using a virtual extensible LAN (VXLAN) tunneling mechanism

Methods and apparatuses for determining an NVGRE data path failure are provided. In an embodiment, a first data packet comprising an echo request is generated at an originating tunnel end point device in a network. The echo request includes an NVGRE network identifier (VSID) associated with a selected NVGRE segment. A second data packet is generated comprising a header having a format associated with an NVGRE technology, the header comprising a network identifier portion including the NVGRE network identifier (VSID). The first data packet is encapsulated in the second data packet, and the second data packet is transmitted via the selected NVGRE segment.

System and method for detecting a network virtualization using generic routing encapsulation (NVGRE) segment data path failure

Methods and apparatuses for determining a VXLAN data path failure are provided. In an embodiment, a first data packet comprising an echo request is generated at an originating tunnel end point device in a network. The echo request includes a VXLAN network identifier (VNI) associated with a selected VXLAN segment. A second data packet is generated comprising a header having a format associated with a VXLAN technology, the header comprising a network identifier portion including the VXLAN network identifier (VNI). The first data packet is encapsulated in the second data packet, and the second data packet is transmitted via the selected VXLAN segment.

System and method for detecting a virtual extensible local area network (VXLAN) segment data path failure

A system, method and apparatus for causing network routers such as Area Border Routers (ABRs) to use a preferred tie-breaking mechanism to select one path in the event of an ERO expansion operation resulting in multiple equal cost paths.

System and method for inter-domain RSVP-TE LSP load balancing

A system, method and apparatus in which RSVP path messages are modified to indicate that a failed source-to-leaf (S2L) sub-LSP or path has switched (or is switching) to a bypass S2L sub-LSP or path via a local-protection mechanism. Thus, a leaf PE node may choose to switch traffic sourcing from a primary tunnel to a standby tunnel even if the primary tunnel appears to be functioning properly. In this manner, any actual or potential suboptimal performance of the primary tunnel due to selection of the local-protection mechanism may be avoided.

System and method for switching traffic from sub-optimal primary P2MP to standby P2MP

In one embodiment, a first network device is configured to receive from a second network device a site-type attribute of the second network device, and to control establishment of a tunnel between the first network device and the second network device based at least in part on the received site-type attribute. The site-type attribute may be received in the first network device as part of a Border Gateway Protocol (BGP) message transmitted by the second network device to the first network device, and may comprise a Multicast Virtual Private Network (MVPN) site-type attribute indicating whether the second network device is a sender site of the MVPN. Controlling establishment of the tunnel between the first network device and the second network device may comprise preventing setup of the tunnel if the received site-type attribute indicates that the second network device is a sender site of the MVPN.

Network device with tunnel establishment control based on site-type attribute received from other network device

A system, method and apparatus of failover indication of a Multicast Virtual Private Networking (MVPN) P-Tunnel at a leaf provider equipment (PE) router. Border Gateway Protocol (BGP) Bidirectional Forwarding Detection (BFD) attributes may be adapted to associate a BFD discriminator with a P-Tunnel terminated at the Leaf PE router such that BFD session status may be used to indicate a tunnel failure condition.

Growing community of inventors

Sunnyvale, CA, United States of America

Pradeep G Jain