公开(公告)号：US20180367456A1

公开(公告)日：2018-12-20

申请号：US15628452

申请日：2017-06-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Ijsbrand Wijnands ,  Neale D.R. Ranns ,  John H.W. Bettink ,  Alessandro Fulli

IPC: H04L12/741 ,  H04L12/707 ,  H04L12/761

Abstract: A method is provided in one example embodiment and may include receiving a packet at a node, wherein the node comprises one or more first data structures comprising Bit Index Explicit Replication (BIER) BitMask information for one or more neighboring forwarders and a second data structure comprising multicast forwarding information; identifying a BIER BitString contained in the packet, wherein the BIER BitString is identified within an Internet Protocol (IP) header or a label included with the packet; determining multicast forwarding information for the packet based on the BIER BitString; and forwarding the packet toward a plurality of destination nodes based on the multicast forwarding information.

公开(公告)号：US20150078378A1

公开(公告)日：2015-03-19

申请号：US14488790

申请日：2014-09-17

Applicant: Cisco Technology, Inc.

Inventor： Ijsbrand Wijnands ,  Gregory J. Shepherd ,  Christian Martin ,  Neale D.R. Ranns ,  Jesper Skriver

IPC: H04L12/18 ,  H04L12/741 ,  H04L12/723 ,  H04L12/761

CPC classification number: H04L12/18 ,  H04L12/1886 ,  H04L45/16 ,  H04L45/18 ,  H04L45/50 ,  H04L45/74

Abstract: Various systems and methods for performing bit indexed explicit replication (BIER) using multiprotocol label switching (MPLS). For example, one method involves receiving a packet that includes a MPLS label. The packet also includes a multicast forwarding entry. The method also involves determining, based on the value of the MPLS label, whether to use the multicast forwarding entry to forward the packet. The method further includes forwarding the packet.

Abstract translation: 使用多协议标签交换（MPLS）执行位索引显式复制（BIER）的各种系统和方法。 例如，一种方法涉及接收包括MPLS标签的分组。 该报文还包括组播转发表项。 该方法还包括根据MPLS标签的值确定是否使用组播转发表项转发报文。 该方法还包括转发分组。

公开(公告)号：US20170230277A1

公开(公告)日：2017-08-10

申请号：US15015463

申请日：2016-02-04

Applicant: Cisco Technology, Inc.

Inventor： Neale D.R. Ranns ,  Ijsbrand Wijnands ,  Gregory J. Shepherd

IPC: H04L12/705 ,  H04L12/18

CPC classification number: H04L45/18 ,  H04L12/1877 ,  H04L45/16

Abstract: Various systems and methods for preventing loops. For example, one method involves receiving a multicast data packet at a node. The node is coupled to a local area network (LAN). An internet protocol (IP) prefix is assigned to the LAN. The method involves determining whether a source address included in the packet is covered by the IP prefix. Depending on the direction of travel of the multicast data packet and whether or not the source address is covered by the IP prefix, the node determines whether a loop exists.

公开(公告)号：US20170126587A1

公开(公告)日：2017-05-04

申请号：US14932016

申请日：2015-11-04

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Neale D.R. Ranns ,  Ijsbrand Wijnands ,  Gregory J. Shepherd

IPC: H04L12/911 ,  H04L12/703

CPC classification number: H04L47/825 ,  H04L45/28

Abstract: Various systems and methods for performing fast fail-over. For example, one method involves receiving a packet at a node. The packet is received at the node in response to a designated forwarder (DF) detecting loss of communication between the DF and a receiver node. The method also involves determining that the first packet was received via a tunnel. The method also involves forwarding the first packet and initiating a DF election. Forwarding the first packet and initiating the DF election are performed in response to determining that the first packet was received via the tunnel.