公开(公告)号：US20130315255A1

公开(公告)日：2013-11-28

申请号：US13958746

申请日：2013-08-05

Applicant: Cisco Technology, Inc.

Inventor： John Joseph Mullooly ,  Ali Sajassi ,  Pradosh Kumar Mohapatra ,  Samer M. Salam

IPC: H04L12/933

CPC classification number: H04L49/15 ,  H04L45/04 ,  H04L45/58

Abstract: In an embodiment, a method of signaling status at a routing device is provided. In this method, the routing device establishes an inter-chassis control plane channel session with a remote routing device. Here, the routing device and the remote routing device are linked to a multi-homed routing device. The routing device then synchronizes with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device. The state of the link is thereafter advertised by way of Border Gateway Protocol (BGP). Additionally, a method of discovering inter-chassis communication peers via BGP between the first and remote routing devices is provided.

Abstract translation: 在一个实施例中，提供了一种在路由设备处发信号通知状态的方法。 在该方法中，路由设备与远程路由设备建立机柜间控制平面信道会话。 这里，路由设备和远程路由设备链接到多宿主路由设备。 然后，路由设备通过机架间控制平面信道会话与远程路由设备同步，以识别从路由设备到多归属路由设备的链路的状态。 之后通过边界网关协议（BGP）通告链路的状态。 另外，提供了一种通过第一和远程路由设备之间的BGP发现机架间通信对等体的方法。

公开(公告)号：US20250031133A1

公开(公告)日：2025-01-23

申请号：US18223255

申请日：2023-07-18

Applicant: Cisco Technology, Inc.

Inventor： Srinath Gundavelli ,  Pradeep Kumar Kathail ,  Eric Voit ,  David A. Maluf ,  Ali Sajassi

IPC: H04W48/12 ,  H04W12/02 ,  H04W12/08

Abstract: Techniques for establishing connections between user devices and access points to connect to networks. Access points may indicate privacy-support capabilities, enabling a user device to discover privacy-capable access networks, and use this capability for network selection. Furthermore, the techniques enable the user device to request to enable and/or disable privacy support on an on-demand basis. The techniques described herein include the use of an access point that indicates the network's privacy capability to an endpoint device (e.g., source device, user device, etc.) over one or more link-layer messages, IP address configuration mechanisms, and over authentication protocols.

公开(公告)号：US20240430227A1

公开(公告)日：2024-12-26

申请号：US18826319

申请日：2024-09-06

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Samir Thoria ,  Lukas Krattiger ,  Manoj Kumar Pandey

IPC: H04L61/5053 ,  H04L9/40 ,  H04L61/5014 ,  H04L101/622

Abstract: Systems and techniques are provided for synchronizing DHCP snoop information. In some examples, a method can include, performing, by a first PE device from a plurality of PE devices, DHCP snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the plurality of PE devices is part of an ethernet segment for multihoming the DHCP client. In some aspects, the method includes determining, based on snooping the first plurality of DHCP messages, an association between an IP address corresponding to the DHCP client and a MAC address corresponding to the DHCP client. In some examples, the method includes sending, by the first PE device to at least one other PE device from the plurality of PE devices, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client.

公开(公告)号：US20240356838A1

公开(公告)日：2024-10-24

申请号：US18490127

申请日：2023-10-19

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Ramchander R Nadipally ,  Neeraj Malhotra

IPC: H04L45/00 ,  H04L45/02 ,  H04L45/76

CPC classification number: H04L45/32 ,  H04L45/02 ,  H04L45/76

Abstract: In one aspect, a method includes receiving, at a first PE in a network of EVPNs, one or more of information on status of one or more nodes connected to the first PE, the one or more nodes being one of a leaf node or a root node; and a respective advertisement message from one or more second PEs. The method further includes performing one or more of generating, based on the information, a route advertisement message indicative of the status of the one or more nodes connected to the first PE, wherein the route advertisement message is shared with one or more second PEs; and based on the respective advertisement message received from each of the one or more second PEs, dynamically adjust configurations at the first PE, to perform ingress filtering or egress filtering of Broadcast, Unknown Unicast, and Multicast (BUM) traffic received at the first PE

公开(公告)号：US20240314066A1

公开(公告)日：2024-09-19

申请号：US18183730

申请日：2023-03-14

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Nitin Kumar

IPC: H04L45/00 ,  H04L12/18 ,  H04L45/42

CPC classification number: H04L45/38 ,  H04L12/185 ,  H04L45/42

Abstract: A system and associated methods provide a scalable solution for managing multiple multicast flows within a multicast group of a multicast network. The system groups redundant sources of the multicast group according to their associated multicast flows, assigns flow identifiers to each redundant source indicative of their associated multicast flows, and facilitates Single Forwarder election to select a Single Forwarder that belongs to the appropriate multicast flow. The system provides control plane extensions that enable signaling of which redundant source belongs to which multicast flow.

公开(公告)号：US11979256B2

公开(公告)日：2024-05-07

申请号：US17813959

申请日：2022-07-21

Applicant: Cisco Technology, Inc.

Inventor： Neeraj Malhotra ,  Balaji Pitta Venkatachalapathy ,  Krishnaswamy Muddenahally Ananthamurthy ,  Ali Sajassi ,  Dhananjaya Kasargod Rao

IPC: H04L12/46 ,  H04L45/00 ,  H04L45/02 ,  H04L45/50 ,  H04L45/741 ,  H04L101/622

CPC classification number: H04L12/4641 ,  H04L45/02 ,  H04L45/50 ,  H04L45/66 ,  H04L45/741 ,  H04L2101/622

Abstract: In one embodiment, a method includes receiving, by a route reflector, a subscription request from a first provider edge node in a network and generating a subscription policy for the first provider edge node. The method also includes receiving a first Ethernet Virtual Private Network (EVPN) Type 2 Route from a second provider edge node, assigning a sequence number to the first EVPN Type 2 Route, and communicating the first EVPN Type 2 Route with the sequence number to the first provider edge node. The method further includes receiving a second EVPN Type 2 Route from a third provider edge node, generating an updated sequence number in response to receiving the second EVPN Type 2 Route from the third provider edge node, and communicating the second EVPN Type 2 Route with the updated sequence number to the first provider edge node and the second provider node.

公开(公告)号：US20240137305A1

公开(公告)日：2024-04-25

申请号：US18401208

申请日：2023-12-29

Applicant: Cisco Technology, Inc.

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

IPC: H04L45/02 ,  H04L12/46

CPC classification number: H04L45/04 ,  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：US11917262B2

公开(公告)日：2024-02-27

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: G06F15/16 ,  H04L12/46 ,  H04L65/611 ,  H04N21/222 ,  H04N21/24 ,  H04N21/6405 ,  H04W8/00

CPC classification number: H04N21/6405 ,  H04L12/4641 ,  H04L65/611 ,  H04N21/222 ,  H04N21/2402 ,  H04N21/2405 ,  H04W8/005

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：US11824797B1

公开(公告)日：2023-11-21

申请号：US17510982

申请日：2021-10-26

Applicant: Cisco Technology, Inc.

Inventor： Mankamana P. Mishra ,  Ali Sajassi ,  Arvind Venkateswaran ,  Jayashree Subramanian ,  Patrice Brissette ,  Satya Ranjan Mohanty

IPC: H04L49/201 ,  H04L49/354 ,  H04L61/103 ,  H04L45/24 ,  H04L45/00

CPC classification number: H04L49/201 ,  H04L45/20 ,  H04L45/24 ,  H04L49/354 ,  H04L61/103

Abstract: At a provider edge (PE) router of PE routers of an Ethernet virtual private network (EVPN) configured to implement a border gateway protocol (BGP): receiving, from a multicast receiver, a multicast join for multicast traffic originated from a multicast source; identifying a next hop PE router for the multicast source; generating an EVPN route to the PE router, the EVPN route including an EVPN instance-route target that identifies the EVPN, and a specifically targeted route target that identifies the next hop PE router and that is configured to override the EVPN instance-route target to cause only the next hop PE router, and not any other of the PE routers, to import the EVPN route, when the EVPN route is advertised across the EVPN to the PE routers; and advertising the EVPN route across the EVPN to the PE routers.

公开(公告)号：US20230370297A1

公开(公告)日：2023-11-16

申请号：US18357771

申请日：2023-07-24

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Mishra ,  Swadesh Agrawal ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Samir Thoria

IPC: H04L12/18 ,  H04L45/50

CPC classification number: H04L12/1859 ,  H04L45/50 ,  H04L12/1895 ,  H04L12/185 ,  H04L2001/0093

Abstract: A computer network efficiently provides a multicast network flow to a multicast recipient across a multihomed network element. The multihomed network element includes network devices that receive multicast data from a source of a multicast network flow. Each particular network device that received the multicast data publishes a notification indicating that the multicast network flow is available from the particular network device. The computer network receives a subscription to the multicast network flow from a multicast recipient, and determines whether to bridge the multicast data across the multihomed network element based on a multicast configuration of the computer network. The multihomed network element provides the multicast data to the multicast recipient from at least one of the particular network devices that received the multicast data from the source of the multicast network flow.