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公开(公告)号：EP3396897A1
公开(公告)日：2018-10-31
申请号：EP18164348.7
申请日：2018-03-27
IPC分类号： H04L12/18 , H04L12/761 , H04L12/723 , H04L12/803 , H04L12/911
CPC分类号： H04L12/18 , H04L12/185 , H04L12/1863 , H04L45/16 , H04L45/50 , H04L47/125 , H04L47/825
摘要： In general, techniques are described for load-balancing responsibility for forwarding of multicast traffic into an active-active Ethernet segment between two or more multi-homed provider edge (PE) routers in an Ethernet Virtual Private Network (EVPN). In one example, a PE router may receive an Internet Group Management Protocol (IGMP) join report for a multicast group. The PE router may send join synch routes used to synchronize the join report for the multicast group across the Ethernet segment. The PE router may deterministically determine whether the PE router is configured to be an elected multicast forwarder for one of a plurality of multicast groups. If the PE router is elected a multicast forwarder, the PE router may configure a forwarding state of the PE router to ignore a designated forwarder calculation and to forward the multicast traffic into the Ethernet segment regardless of whether the PE router is a designated forwarder.
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公开(公告)号：EP4037255A1
公开(公告)日：2022-08-03
申请号：EP21170216.2
申请日：2021-04-23
IPC分类号： H04L12/18
摘要： An example egress network device includes at least one computer processor and a memory. The memory includes instructions that cause the at least one computer processor to receive messages from each of a plurality of ingress network devices. Each message specifies a multicast source as an anycast address that belongs to two or more sources, a multicast group, and a customer site identifier that uniquely identifies a customer network device via which the anycast address is reachable. The instructions cause the at least one computer processor to select, based on the customer site identifiers, one of the plurality of ingress network devices to which to send a multicast join message of a plurality of multicast join messages for the multicast source and multicast group. The instructions cause the at least one computer processor to send the multicast join message to the selected one of the plurality of ingress network devices.
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公开(公告)号：EP3866391A1
公开(公告)日：2021-08-18
申请号：EP20173469.6
申请日：2020-05-07
IPC分类号： H04L12/18 , H04L12/761
摘要： The potential problem of sending (or resending) PIM join/prune messages (referred to as "PIM join(s)") too infrequently may be solved by: (a) sending a PIM join, including a unique message identifier value, to an upstream PIM peer; (b) responsive to sending the PIM join, (1) starting a quick refresh timer, and (2) starting a standard refresh timer, which is longer than the quick refresh timer; (c) responsive to a determination that the quick refresh timer expired, (1) resending the PIM join to the upstream PIM peer, and (2) restarting the quick refresh timer; (d) responsive to a determination that the standard refresh timer expired, (1) resending the PIM join message to the upstream PIM peer, and (2) restarting the standard refresh timer; (e) receiving a PIM join response from the upstream PIM peer, wherein the PIM join response includes a unique message identifier value; (f) responsive to receiving the PIM join response and determining that the unique message identifier value in the PIM join response matches the unique message identifier value in the PIM join/prune message, stopping the quick refresh timer. The potential problem of sending (or resending) PIM joins too frequently may be solved by having the PIM join response further include a long refresh timer value, and responsive to receiving the PIM join response from the upstream peer, further (1) stopping the standard refresh timer, and (2) starting a long fresh timer using the long refresh timer value, and responsive to determining that the long refresh timer expired, (1) resending the PIM join/prune message to the upstream PIM peer, and (2) restarting the long refresh timer.
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公开(公告)号：EP3641241A1
公开(公告)日：2020-04-22
申请号：EP19181699.0
申请日：2019-06-21
发明人： NAGARAJAN, Vikram , ARORA, Kapil , KEBLER, Robert W. , ELIZABETH, Princy T. , KANDULA, Ramesh , JOARDER, Soumyodeep
IPC分类号： H04L12/701
摘要： Techniques are described for facilitating node protection for Broadcast, unknown Unicast, and Multicast (BUM) traffic for a multi-homed node failure. For example, each VTEP (e.g., PE device) may advertise a protected VTEP address that indicates an IP address of a remote PE device that is to be protected in the event of a node failure. In the event a multi-homed PE device fails, the ingress PE device sends a BUM packet including the protected VTEP address for the failed node. When an egress PE device receives the BUM packet, the egress PE device determines whether the BUM packet includes the protected VTEP address and whether the egress PE device is operating as a backup designated forwarder (DF). If the BUM packet includes the protected VTEP address and the egress PE device is a backup DF, the egress PE device forwards the BUM traffic to the ESI.
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公开(公告)号：EP3958517A1
公开(公告)日：2022-02-23
申请号：EP20206193.3
申请日：2020-11-06
IPC分类号： H04L12/46
摘要： In some examples, a method includes receiving, by an egress network device for a network, messages from each of a plurality of ingress network devices for the network, wherein each of the messages specifies a multicast source, a multicast group, and an upstream multicast hop weight value for multicast traffic for the multicast source and the multicast group; selecting, by the egress network device and based on the upstream multicast hop weight values specified by the received messages, one of the plurality of ingress network devices to which to send a multicast join message of a plurality of multicast join messages for the multicast source and multicast group; and sending, by the egress network device, the multicast join message to the selected one of the plurality of ingress network devices.
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公开(公告)号：EP3435595B1
公开(公告)日：2020-10-07
申请号：EP18180678.7
申请日：2018-06-29
IPC分类号： H04L12/18 , H04L12/701
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7.发明公开
公开(公告)号：EP3588868A3
公开(公告)日：2020-02-26
申请号：EP19165991.1
申请日：2019-03-28
摘要： A device may store first information regarding a first pseudowire connection with a first device, wherein the first pseudowire connection provides access to an Ethernet virtual private network (EVPN) to communicate with a host device. The device may store second information regarding a second pseudowire connection with a second device, wherein the second pseudowire connection provides access to the EVPN to communicate with the host device. The device may receive a message that includes a configuration identifier and identify the configuration identifier. The device may change a first characteristic of the first pseudowire connection based on the configuration identifier. The device may change a second characteristic of the second pseudowire connection based on the configuration identifier. The device may receive data from the host device based on changing the first characteristic of the first pseudowire connection and changing the second characteristic of the second pseudowire connection.
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公开(公告)号：EP3422632A1
公开(公告)日：2019-01-02
申请号：EP18174996.1
申请日：2018-05-30
IPC分类号： H04L12/18 , H04L12/761 , H04L12/709
摘要： Techniques are described for grouping related flows using a flow attribute value indicated by a modified protocol independent multicast (PIM) join request. According to techniques of this disclosure, a network device is configured to receive, from a downstream network device, two or more first PIM join requests indicating two or more multicast groups. In response to determining that each first PIM join request of the two or more first PIM join requests indicates a common first flow attribute value, the network device is configured to select a common path. The network device is further configured to send two or more second PIM join requests indicating the two or more multicast groups to an upstream network device along the selected common path and toward the source. Each second PIM join request of the two or more second PIM join requests includes a common second flow attribute value.
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10.发明公开COMMUNICATING IGMP LEAVE REQUESTS BETWEEN LOAD-BALANCED, MULTI-HOMED PROVIDER-EDGE ROUTERS IN AN ETHERNET VIRTUAL PRIVATE NETWORK 审中-公开在以太网虚拟专用网络中传递负载均衡，多个提供者边缘路由器之间的IGMP请求
公开(公告)号：EP3276895A1
公开(公告)日：2018-01-31
申请号：EP17183882.4
申请日：2017-07-28
IPC分类号： H04L12/761
摘要： In general, the disclosure describes techniques for communicating multicast group leave requests between two or more load-balanced, multi-homed PE routers included in an Ethernet Virtual Private Network (EVPN). The techniques of the disclosure enable the two or more PE routers to synchronize IGMP state and routing information amongst one another to ensure that the one of the multi-homed PE routers elected as the designated forwarder (DF) ceases forwarding the multicast group traffic to the CE router, even if it is not the PE router that receives the IGMP leave request.
摘要翻译： 通常，本公开描述了用于在包括在以太网虚拟专用网络（EVPN）中的两个或更多个负载平衡的多宿主PE路由器之间传递多播群组离开请求的技术。 本公开的技术使两个或更多个PE路由器能够使IGMP状态和路由信息彼此同步，以确保选择为指定转发器（DF）的多宿主PE路由器之一停止将多播组业务转发到 CE路由器，即使它不是收到IGMP离开请求的PE路由器。
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