Telefonaktiebolaget Lm Ericsson (publ)

Przygienda, Antoni

Prasanna Chalapathy

Antoni Bronislaw Przygienda

Pramodh D'Souza

V S Jagannadham (Jack) Jonnalagadda

Sajjad Ahmed

Antoni Przygienda

VS Jagannadham Jonnalagadda

A method and apparatus for enabling dynamic reroute in a redundant system is provided. A network device is operative to determine whether a state of a link that couples the first network device with a third network device is active. In response to determining that the state of the link is active causing a payload of a packet to be forwarded towards the third network device through the second network interface of the first network device based on a second IP address; and responsive to determining that the state of the link is not active causing the second payload to be forwarded towards the third network device through a third network interface of the second network device based on the second IP address.

Dynamic re-route in a redundant system of a packet network

Methods and apparatuses for updating multiple multiprotocol label switching (MPLS) bidirectional forwarding detection (BFD) sessions are described. In response to determining that an MPLS BFD session is in an up state, an egress network device (ND) determines whether the MPLS BFD session is part of a plurality of MPLS BFD sessions; and responsive to determining that the MPLS BFD session is part of the plurality of MPLS BFD sessions, the egress ND transmits towards an ingress network device a BFD control packet including an ingress group identifier that uniquely identifies the plurality of MPLS BFD sessions at the ingress network device, and where the transmitting the BFD control packet causes an update of a set of two or more of MPLS BFD sessions from the plurality of MPLS BFD sessions identified based on the ingress group identifier.

Method and apparatus for updating multiple multiprotocol label switching (MPLS) bidirectional forwarding detection (BFD) sessions

A method is implemented by a network device functioning as a provider edge (PE) device to determine a designated forwarder (DF) for sending broadcast, unknown unicast or multicast (BUM) traffic to a customer edge (CE) device, which is connected to a plurality of PE devices in an Ethernet virtual private network (EVPN) instance on a given Ethernet segment. The method reduces a time for DF determination and loss of traffic for the CE device. The method determines whether a number of active links from the network device to the CE device is greater than an active link minimum. The method also determines that the network device is the DF in response to determining that the number of active links is greater than the active link minimum.

Designated forwarder (DF) election and re-election on provider edge (PE) failure in all-active redundancy topology

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San Jose, CA, United States of America

Prasanna Chalapathy