公开(公告)号：US11695592B2

公开(公告)日：2023-07-04

申请号：US17103588

申请日：2020-11-24

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Samir Thoria ,  Ali Sajassi

IPC: H04L12/28 ,  H04L12/54 ,  H04L12/66 ,  H04L12/46 ,  H04L12/70

CPC classification number: H04L12/56 ,  H04L12/4641 ,  H04L12/66 ,  H04L2012/5641 ,  H04L2012/5642 ,  H04L2012/5648

Abstract: In one embodiment, a method includes receiving a broadcast, unknown-unicast, or multicast (BUM) frame from a connected device, where the BUM frame is associated with a broadcast domain, determining a segment within the broadcast domain associated with the device, adding to the BUM frame a segment identifier that uniquely identifies the segment within the broadcast domain, and causing the BUM frame to be delivered to one or more recipient network apparatuses in a network associated with the broadcast domain, where the segment identifier added to the BUM frame is configured to be used by the one or more recipient network apparatuses to selectively forward the BUM frame to connected devices that are associated with segment identifier.

公开(公告)号：US20230188457A1

公开(公告)日：2023-06-15

申请号：US18166775

申请日：2023-02-09

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ijsbrand Wijnands ,  Anuj Budhiraja ,  Ali Sajassi ,  Stephane Litkowski ,  Satya Ranjan Mohanty

IPC: H04L45/16 ,  H04L45/586 ,  H04L12/18 ,  H04L12/46 ,  H04L45/02

CPC classification number: H04L45/16 ,  H04L45/586 ,  H04L12/1886 ,  H04L12/4641 ,  H04L12/185 ,  H04L45/02

Abstract: A method comprises, at a first router configured to perform Bit Index Explicit Replication (BIER) for forwarding of multicast packets in a network, storing configuration information that indicates that the first router belongs to multiple subdomains of a BIER domain, and is able to forward the multicast packets for a virtual private network on the multiple subdomains. The method further comprises, during an auto-discovery procedure, generating an auto-discovery message to include an auto-discovery route and route attributes that indicate the multiple subdomains, and sending the auto-discovery message to a second router of the virtual private network the network.

公开(公告)号：US11627071B2

公开(公告)日：2023-04-11

申请号：US17361510

申请日：2021-06-29

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ijsbrand Wijnands ,  Anuj Budhiraja ,  Ali Sajassi ,  Stephane Litkowski ,  Satya Ranjan Mohanty

IPC: H04L45/00 ,  H04L45/16 ,  H04L45/586 ,  H04L12/18 ,  H04L12/46 ,  H04L45/02

Abstract: A method comprises, at a first router configured to perform Bit Index Explicit Replication (BIER) for forwarding of multicast packets in a network, storing configuration information that indicates that the first router belongs to multiple subdomains of a BIER domain, and is able to forward the multicast packets for a virtual private network on the multiple subdomains. The method further comprises, during an auto-discovery procedure, generating an auto-discovery message to include an auto-discovery route and route attributes that indicate the multiple subdomains, and sending the auto-discovery message to a second router of the virtual private network the network.

公开(公告)号：US20220417141A1

公开(公告)日：2022-12-29

申请号：US17805616

申请日：2022-06-06

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Ali Sajassi ,  Lukas Krattiger

IPC: H04L45/50 ,  H04L45/64 ,  H04L12/46 ,  H04L12/66 ,  H04L45/00

Abstract: A system and method are disclosed for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. A system is configured to receive a route advertisement, examine the label fields of the route advertisement, and determine whether Layer 2 or Layer 3 information is conveyed. The system is further configured to build a route advertisement to advertise to a second device based on whether Layer 2 or Layer 3 information is conveyed in the first route advertisement.

公开(公告)号：US20220286752A1

公开(公告)日：2022-09-08

申请号：US17751112

申请日：2022-05-23

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Samir Thoria ,  Tapraj Singh ,  Mankamana Prasad Mishra

IPC: H04N21/6405 ,  H04L12/46 ,  H04N21/24 ,  H04N21/222 ,  H04L65/611

Abstract: A method is performed by a first provider edge (PE) of a redundancy group including provider edges configured with an Ethernet virtual private network (EVPN) segment identifier (EVI) and an Ethernet segment identifier (ESI) and that are multi-homed to a customer edge (CE). The method includes, upon receiving from the CE a join request including a group address for a multicast stream, electing a designated forwarder (DF) for the multicast stream. The electing includes: computing for each PE a respective affinity for the DF as a function of a respective address of the PE, the EVI, and the group address; and determining which PE has a largest affinity. The method further includes, if the first PE has the largest affinity or does not have the largest affinity, configuring the first PE as the designated forwarder or not configuring the first PE as the designated forwarder for the multicast stream, respectively.

公开(公告)号：US11431608B2

公开(公告)日：2022-08-30

申请号：US17039142

申请日：2020-09-30

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Ali Sajassi ,  Mei Zhang ,  Luc Andre Burdet

IPC: H04L12/18 ,  H04L12/46 ,  H04L12/66 ,  H04L41/04 ,  H04L41/0654 ,  H04L41/0677 ,  H04L41/12 ,  H04L45/00 ,  H04L45/02 ,  H04L45/16 ,  H04L45/18 ,  H04L45/28 ,  H04L45/50 ,  H04L45/745 ,  H04L47/10 ,  H04L47/125 ,  H04L47/25 ,  H04L47/70 ,  H04L47/80 ,  H04L49/201 ,  H04L49/354 ,  H04L49/65 ,  H04L69/00 ,  H04L69/18 ,  H04L69/32 ,  H04L69/322 ,  H04L69/324 ,  H04L69/40 ,  H04L69/30

Abstract: In one embodiment, a method according to the present disclosure includes receiving a topology change advertisement at a remote core edge node and performing a network address information removal operation. The topology change advertisement is received from a core edge node that is in communication with an access network. The topology change advertisement indicates that a topology change has occurred in the access network. The network address information removal operation removes network address information stored by the remote core edge node. The network address information is used by the remote core edge node in participating in communications with the core edge node.

公开(公告)号：US20210392069A1

公开(公告)日：2021-12-16

申请号：US17343697

申请日：2021-06-09

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Neeraj Malhotra ,  Lukas Krattiger ,  Ali Sajassi ,  Rajesh Sharma ,  Kesavan Thiruvenkatasamy ,  Aparna Pattekar

IPC: H04L12/715 ,  H04L12/46

Abstract: This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.

公开(公告)号：US11159337B1

公开(公告)日：2021-10-26

申请号：US16858978

申请日：2020-04-27

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Krishnaswamy Muddenahally Ananthamurthy ,  Jayashree Subramanian

IPC: H04L12/18 ,  H04L12/46 ,  H04L29/06 ,  H04L12/741 ,  H04L12/913 ,  H04L12/761

Abstract: A networking environment includes a first node and a second node configured as Ethernet Virtual Private Networking (EVPN) peers on an EVPN subnet that is coupled to a Layer 3 VPN over a core network. The first node receives a first multicast join request from a third node in the core network, the first multicast join request including a source address and multicast group address of a source of a multicast stream. The first node determines that the source address and the multicast group address for the source are behind the EVPN subnet at the second node. The first node sends to the second node, a control plane join request message that includes a receiver identifier that identifies the third node as a receiver of the multicast stream, the receiver identifier enabling the second node to forward the multicast stream directly into the core network to the third node.

公开(公告)号：US20210226890A1

公开(公告)日：2021-07-22

申请号：US17182221

申请日：2021-02-22

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Ali Sajassi ,  Lukas Krattiger

IPC: H04L12/723 ,  H04L12/715 ,  H04L12/46 ,  H04L12/66 ,  H04L12/721

Abstract: A system and method are disclosed for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. A system is configured to receive a route advertisement, examine the label fields of the route advertisement, and determine whether Layer 2 or Layer 3 information is conveyed. The system is further configured to build a route advertisement to advertise to a second device based on whether Layer 2 or Layer 3 information is conveyed in the first route advertisement.

公开(公告)号：US20210168073A1

公开(公告)日：2021-06-03

申请号：US17172496

申请日：2021-02-10

Applicant: Cisco Technology, Inc.

Inventor： Dhananjaya Rao ,  Ali Sajassi

IPC: H04L12/715 ,  H04L12/721 ,  H04L29/12 ,  H04L12/66 ,  H04L12/46 ,  H04L12/709

Abstract: Apparatuses and methods are provided in which a CE protocol communication session is established, at a first provider edge network device (PE), for customer equipment device (CE) multi-homed to the first PE and one or more second PEs. The first PE is an owner of the CE protocol communication session. The first PE signals to the one or more second PEs an ownership message indicating that the first PE is the owner of the CE protocol communication session. The ownership message includes parameters that enable one or more second PEs to install in their respective forwarding tables a redirect policy to instruct the respective PE to forward packets of this session to the first PE via an overlay segment. The first PE receives the packets of the session via the overlay segment based on the ownership message.