Zafar Ali, 583250 70Th St, Flushing, NY 11370

2013023, Sep 5, 2013

Mar 3, 2013

13/783368

Zafar Ali - Hicksville NY, US
Clarence Filsfils - Brussels, BE
Ornan Alexander Gerstel - Herzelia, IL
Jean-Philippe Vasseur - Saint Martin d'Uriage, FR
Walid Wakim - Aurora IL, US
Matthew Hartley - Ottawa, CA
George Leonard Swallow - Boston MA, US

H04L 29/06

709203

In one embodiment, information is exchanged between independent control planes of different layers in a multilayer network, such as, but not limited to, between a packet switching client-layer network and an optical server-layer network. This exchanged information includes signaling regarding a server-layer communications service, having server-layer characteristics, within the server-layer network for use in communicatively coupling at least two devices of the client-layer network. In one embodiment, the client-layer network specifies at least one of these server-layer characteristics that the server-layer communications service provided by the server-layer network must have. In one embodiment, the server-layer network signal to the client-layer network at least one of these server-layer characteristics of the existing server-layer communications service. In one embodiment, this signaling between the client-layer network and the server-layer network includes sending extended Resource Reservation Protocol (RSVP) messages.

2014000, Jan 2, 2014

Jun 27, 2012

13/534543

Rakesh Gandhi - Ontario, CA
Zafar Ali - Hicksville NY, US

CISCO TECHNOLOGY, INC. - San Jose CA

H04L 29/14
H04L 12/28

370225, 370256

A path protection method that includes: establishing a point to multi-point (P2MP) tree spanning from a head node to a plurality of tail nodes, the P2MP tree providing a label switched path (LSP) from the head node to a particular tail node; identifying a first and a second pluralities of source-to-leaf (S2L) sub-LSPs for the LSP included within the P2MP tree, each corresponding pair of S2L sub-LSP in the first and second pluralities are path diverse; setting a first flag in a RSVP path message to designate the second plurality of S2L sub-LSPs as protecting respective S2L sub-LSPs in the first plurality at a baseline level of protection; setting a second flag to designate a subset of S2L sub-LSPs in the second plurality as protecting respective S2L sub-LSPs in the first plurality at an elevated level of protection; and transmitting the RSVP path message.

2014006, Mar 6, 2014

Aug 31, 2012

13/600834

Michel Taillon - Stittsville, CA
Tarek Saad - Nepean, CA
Rakesh Gandhi - Stillsville, CA
Zafar Ali - Hicksville NY, US

H04L 12/56
H04L 29/14

370225, 370392

In one embodiment, network devices are configured to route traffic and signaling onto co-routed bypass tunnels. Co-routed bypass tunnels protect against node or link failures in a label switched paths. The co-routed bypass tunnels provide bidirectional protection. In one example, a node acting as the point of local repair (PLR) receives a resource reservation state message at a first node and extracts a tunnel sender address from the reservation state message. The PLR is configured to identify a bypass tunnel to a second node in the reverse direction of the label switched path and signal resource reservation messages over the bypass tunnel in the reverse direction. In another example, a PLR receives a resource reservation message with bypass tunnel identification and the PLR is configured to identify a bypass tunnel to a second node in the reverse direction.

2022041, Dec 29, 2022

Jul 8, 2022

17/811570

- San Jose CA, US
Zafar Ali - Hicksville NY, US
Syed Kamran Raza - Kanata, CA
Ahmed Refaat Bashandy - Milpitas CA, US
Nagendra Kumar Nainar - Morrisville NC, US
Carlos M. Pignataro - Cary NC, US
Jaganbabu Rajamanickam - Stittsville, CA
Rakesh Gandhi - Stittsville, CA
Bhupendra Yadav - Kanata, CA
Faisal Iqbal - Ottawa, CA

H04L 45/00
H04L 43/106
H04L 45/02
H04L 41/0246

In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

2022028, Sep 8, 2022

Nov 3, 2021

17/453353

- San Jose CA, US
Clarence FILSFILS - Brussels, BE
Zafar ALI - Hicksville NY, US
Patrice BRISSETTE - Gatineau, CA

Cisco Technology, Inc., a California corporation - San Jose CA

H04L 12/741
H04L 12/733

In one embodiment, Segment Routing Internet Protocol Version 6 (SRv) micro segments (“uSIDs”) are included in destination addresses, and possibly in other Segment Identifiers (“SIDs”), of packets transported through a network, and invoking corresponding network behavior, including, but not limited to, realization of corresponding network slices. In one embodiment, network nodes are configured to perform differential network slice realization functionality based on values slice-representative value(s) provided by global and/or local uSIDs of packets. This configuration may be defined by a controller in the network and/or routing protocol advertisements. Responsive to a received packet, a network node identifies and performs the corresponding network slice realization functionality based on slice-representative value(s) provided by one or more global and/or local uSIDs of the destination address of the received packet. Various encodings within an IPv Destination Address of the encapsulating packet are disclosed.

2023002, Jan 19, 2023

May 10, 2022

17/741241

- San Jose CA, US
Zafar Ali - Hicksville NY, US
Francois Clad - Strasbourg, FR
Bertrand Herbert Guy Duvivier - Wepion, BE
Mikhail Koldychev - Ottawa, CA
Rakesh Gandhi - Stittsville, CA
Sagar Soni - Ottawa, CA

H04L 45/42
H04L 45/00
H04L 45/74
H04L 45/28

Disclosed are systems, apparatuses, methods, and computer-readable media to implement circuit-style network with co-routed bidirectional network paths. A method includes receiving a request for a circuit policy between a source node and a destination node, the circuit policy defining a co-routed bidirectional policy between the source node and the destination node; requesting a path compute service to identify a path between the source node and the destination node that satisfies the circuit policy through a first network; receiving a path identifying a first set of network nodes that satisfy the circuit policy; configuring each node in the first set of network nodes within the first network with the circuit policy; and establishing a connection using the path that satisfies the circuit policy between the source node and the destination node.

2021037, Dec 2, 2021

Aug 17, 2021

17/404817

- San Jose CA, US
Francois Clad - Strasbourg, FR
Zafar Ali - Hicksville NY, US
Peter Psenak - Bratislava, SK

H04L 12/721
H04L 29/06
H04L 12/715

Techniques and mechanisms for compressing the size of SIDs to be smaller than a complete IPv6 address (or “micro SIDs”), and scaling micro SIDs across a multi-domain environment using micro SID-domain-blocks. Segment routing over IPv6 (SRv6) uses 128-bit IPv6 addresses as SIDs for segment routing. According to this disclosure, multiple SRv6 SIDs may be expressed in a compact format such that a 128-bit IPv6 address, such as the destination address field of the IPv6 header, may store multiple micro SIDs. Further, SID-domain-blocks may be assigned to each domain in a multi-domain network such that micro SIDs may be expressed in the context of a given domain, rather than being shared in the global multi-domain network. In this way, lists of domain-specific SIDs may be fully expressed in the IPv6 destination address of the packet to scale micro SID into large, multi-domain networks.

2021009, Mar 25, 2021

Sep 23, 2019

16/579578

- San Jose CA, US
Francois CLAD - Strasbourg, FR
Muthurajah SIVABALAN - Kanata, CA
Zafar ALI - Hicksville NY, US

H04L 12/715
H04L 29/12
H04L 12/713
H04L 12/721
H04L 12/707

Aspects described herein include a method for use with a software-defined network controller, as well as an associated computer program product and system. The method comprises assigning a segment identifier to an endpoint node within a destination domain of a plurality of domains. Adjacent domains of the plurality of domains are connected via a respective set of two or more domain border routers. The method further comprises assigning a respective segment identifier to each domain. Each domain border router advertises the segment identifiers of the respective two adjacent domains. The method further comprises, responsive to a request from a headend node within a source domain of the plurality of domains, computing a path from the headend node to the endpoint node. The path includes (i) the segment identifiers of any domains between the headend node and the endpoint node, and (ii) the segment identifier of the endpoint node.