Evgeny Jeff Tantsura

20130322231, Dec 5, 2013

Jun 1, 2012

13/486472

András Császár - Budapest, HU
Evgeny Tantsura - San Jose CA, US
Gábor Sándor Enyedi - Bekescsaba, HU

Telefonaktiebolaget L M Ericsson (publ) - Stockholm

H04L 12/26

370217

A failure detection mechanism provides enhancements to PIM-SM based fast re-route techniques. A network node upon detecting a loss of connection determines whether it can re-route multicast data traffic. If the network node does not have a failure-free secondary path, it can originate a notification packet and send it to the downstream parts of a multicast tree. The notification packet can trigger one or more downstream nodes to switch-over to redundant secondary paths to re-route the multicast data traffic.

20130322232, Dec 5, 2013

Jun 1, 2012

13/486651

András Császár - Budapest, HU
Evgeny Tantsura - Palo Alto CA, US
Gábor Sándor Enyedi - Bakescsaba, HU

Telefonaktiebolaget L M Ericsson (publ) - Stockholm

H04L 12/26

370217

An upstream activation mechanism provides enhancements to PIM-SM based fast re-route in a multicast communication network, where secondary paths provides redundancy to a multicast tree and are on standby to reduce bandwidth usage when there is no failure in the network. Upon receiving an indication of a loss of connection to the primary path of the multicast tree network, a network node that has a failure-free secondary path to a common source node of the multicast tree sends an activation packet upstream toward the common source node via the failure-free secondary path. The activation packet causes one or more upstream nodes to unblock their respective outgoing interfaces to thereby activate transmission of the multicast data traffic on the failure-free secondary path.

20190097928, Mar 28, 2019

May 31, 2016

16/089125

- Stockholm, SE
Kiran SASIDHARAN PILLAI - Fremont CA, US
Evgeny TANTSURA - Palo Alto CA, US

H04L 12/721
H04L 12/715
H04L 12/751
H04L 12/723
H04L 12/46

A method is implemented by a first Provider Edge (PE) network device in a network to configure a pseudo-wire (PW) between the first PE network device and a second PE network device in the network using Intermediate System to Intermediate System (IS-IS). The method includes receiving a first LSP update flooded in the network by the second PE network device via IS-IS, where the first LSP update advertises the PW. The method further includes configuring a local forwarding information base with a local PW label associated with the PW such that the first PE network device forwards traffic encapsulated with the local PW label to an Attachment Circuit associated with the PW and flooding a second LSP update in the network via IS-IS that includes an indication that the first PE network device is ready to receive traffic from the second PE network device over the PW.

20190089627, Mar 21, 2019

Apr 29, 2016

16/084960

- Stockholm, SE
Evgeny TANTSURA - Palo Alto CA, US

Telefonaktiebolaget LM Ericsson (publ) - Stockholm

H04L 12/703
H04L 12/709
H04L 12/723
H04L 12/707
H04L 12/761
H04L 12/26
H04L 12/749

Methods and apparatuses for enabling sub-seconds link failure detection in a multi-chassis link aggregation group (MC-LAG) system are described. A first network device of a packet network transmits a Multiprotocol Label Switching (MPLS) encapsulated packet over a first link that is part of the MC-LAG, where the MC-LAG couples the first network device with a second network device and a third network device and the second and third network devices are part of an inter-chassis redundancy (ICR) system. The MPLS encapsulated packet includes a generic associated channel header (ACH) and a payload, and where the payload includes a bidirectional forwarding detection (BFD) control packet.

20190081855, Mar 14, 2019

Dec 22, 2017

15/853147

- Plano TX, US
Yingzhen Qu - San Jose CA, US
Evgeny Tantsura - Palo Alto CA, US

H04L 12/24
G06F 17/30

A computer-implemented method of discrepancy detection by a configuration server is provided that comprises: receiving, by one or more processors of the configuration server, a request to compare a first management datastore with a second management datastore; comparing, by the one or more processors of the configuration server, the first management datastore with the second management datastore to identify differences; and in response to the request, sending over a network, by the one or more processors of the configuration server, the differences.

20190058653, Feb 21, 2019

Apr 29, 2016

16/084963

- Stockholm, SE
Evgeny TANTSURA - Palo Alto CA, US

H04L 12/703
H04L 12/709
H04L 12/24
H04L 12/749

Methods and apparatuses for enabling sub-seconds link failure detection in a multi-chassis link aggregation group (MC-LAG) system are described. A first network device of a packet network transmits an IP packet over a first link that is part of the MC-LAG, where the MC-LAG couples the first network device with a second network device and a third network device and the second and third network devices are part of an Inter-Chassis Redundancy (ICR) system. The IP packet includes a payload including a Bidirectional Forwarding Detection (BFD) control packet, where the destination address of the IP packet is one of a multicast IP address and a broadcast IP address.

20190058657, Feb 21, 2019

Apr 1, 2016

16/077837

- Stockholm, SE
Evgeny TANTSURA - Palo Alto CA, US
Amarnath AMMIREDDY - San Jose CA, US

H04L 12/723
H04L 12/721
H04L 12/717

A router operates in both a Segment Routing (SR) network portion and a Multiprotocol Label Switching (MPLS) network portion of a network that utilizes Open Shortest Path First (OSPF). The router receives an OSPF advertisement message originated by a mapping server that includes a sub-Type-length-value (sub-TLV) element that identifies a preferred type of path across the MPLS network portion for an identifiable set of traffic that is to be received by the router from the SR network portion. The router identifies, based at least in part upon the sub-TLV element, one path of a plurality of available paths across the MPLS network portion for the identifiable set of traffic, and configures its forwarding plane to utilize the identified one path accordingly for the identifiable set of traffic. The OSPF advertisement message can be an OSPF LSA, and can carry an Extended Prefix Range TLV including the sub-TLV element.

20180295054, Oct 11, 2018

Apr 6, 2017

15/481271

- Plano TX, US
Evgeny Tantsura - Palo Alto CA, US

H04L 12/723
H04L 12/721
H04L 12/775
H04L 29/12
H04L 12/741

A provider edge (PE) router and methods for establishing a pseudowire using open shortest path first (OSPF) link state advertisement (LSA) messages. The pseudowire links the PE router with a remote PE router through a packet switched network (PSN), and emulates other communications protocols to provide customer edge (CE) equipment connected to the PE routers the appearance of a dedicated private circuit.