公开(公告)号：US20160065455A1

公开(公告)日：2016-03-03

申请号：US14472469

申请日：2014-08-29

Applicant: Cisco Technology, Inc.

Inventor： Alan Xiao-rong Wang ,  Dapeng Liu ,  Yu Zhang ,  Gaofeng Tao

IPC: H04L12/721 ,  H04L12/733 ,  H04L12/715 ,  H04L29/08 ,  H04L12/851 ,  H04L12/859

CPC classification number: H04L45/38 ,  H04L45/04 ,  H04L45/20 ,  H04L47/2441 ,  H04L47/2475

Abstract: Techniques whereby a LAN-side border router observes all packets of an application flow from both directions so that the application recognition performed on the LAN-side border router functions properly. A border router may implement flags in a flow cache to indicate whether the border router is the LAN-side border router and/or a WAN-side border router for an application flow. As packets are received at a border router at either the LAN interface or WAN interface, the flags associated with packet's application flows are examined to determine if the border router is the LAN-side border router for the application flow. If so, then application recognition and routing control may be performed. If not, the packet may be redirected to another border router that may be the LAN-side border router or the WAN-side border router for the application flow to insure that border router observes the packet.

Abstract translation: LAN侧边界路由器从两个方向观察应用流的所有分组的技术，使得在LAN侧边界路由器上执行的应用识别功能正常工作。 边界路由器可以在流缓存中实现标志，以指示边界路由器是否是用于应用流的LAN侧边界路由器和/或WAN侧边界路由器。 当分组在LAN接口或WAN接口处的边界路由器处被接收时，检查与分组的应用流相关联的标志，以确定边界路由器是否是应用流的LAN侧边界路由器。 如果是这样，则可以执行应用识别和路由控制。 如果不是，则该分组可以被重定向到可能是用于该应用流的LAN侧边界路由器或WAN侧边界路由器的另一边界路由器，以确保边界路由器观察该分组。

公开(公告)号：US10257083B2

公开(公告)日：2019-04-09

申请号：US14472469

申请日：2014-08-29

Applicant: Cisco Technology, Inc.

Inventor： Alan Xiao-rong Wang ,  Dapeng Liu ,  Yu Zhang ,  Gaofeng Tao

IPC: H04L12/701 ,  H04L12/721 ,  H04L12/851 ,  H04L12/859 ,  H04L12/715 ,  H04L12/733

Abstract: Techniques whereby a LAN-side border router observes all packets of an application flow from both directions so that the application recognition performed on the LAN-side border router functions properly. A border router may implement flags in a flow cache to indicate whether the border router is the LAN-side border router and/or a WAN-side border router for an application flow. As packets are received at a border router at either the LAN interface or WAN interface, the flags associated with packet's application flows are examined to determine if the border router is the LAN-side border router for the application flow. If so, then application recognition and routing control may be performed. If not, the packet may be redirected to another border router that may be the LAN-side border router or the WAN-side border router for the application flow to insure that border router observes the packet.

公开(公告)号：US09755971B2

公开(公告)日：2017-09-05

申请号：US15042222

申请日：2016-02-12

Applicant: Cisco Technology, Inc.

Inventor： Xiaorong Wang ,  Dapeng Liu ,  Hunan Cao ,  Hongbo Xia

IPC: H04L12/741 ,  H04L12/803 ,  H04L12/721 ,  H04L12/715 ,  H04L12/46 ,  H04L12/723 ,  H04L12/813

CPC classification number: H04L45/745 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/38 ,  H04L45/50 ,  H04L45/74 ,  H04L47/125 ,  H04L47/20

Abstract: In response to receiving one or more packets from an interface, an anchoring border router classifies the traffic flow and either transmits the packets based upon the routing control table as usual, or determines that the packets of the traffic flow are to be forwarded to a forwarding border router. Upon determining that the packets are to be forwarded, the packets are encapsulated with a routing encapsulation key corresponding to a routing path and are forwarded from the anchoring border router to the forwarding border router via a routing encapsulation tunnel. When a forwarding border router receives the redirected packets over the routing encapsulation tunnel, the forwarding border router removes the routing encapsulation key from the packets of the traffic flow and transmits the packets via a routing path corresponding to the routing encapsulation key.

公开(公告)号：US20160164782A1

公开(公告)日：2016-06-09

申请号：US15042222

申请日：2016-02-12

Applicant: Cisco Technology, Inc.

Inventor： Xiaorong Wang ,  Dapeng Liu ,  Hunan Cao ,  Hongbo Xia

IPC: H04L12/741 ,  H04L12/721 ,  H04L12/723 ,  H04L12/46 ,  H04L12/813 ,  H04L12/715 ,  H04L12/803

CPC classification number: H04L45/745 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/38 ,  H04L45/50 ,  H04L45/74 ,  H04L47/125 ,  H04L47/20

Abstract: In response to receiving one or more packets from an interface, an anchoring border router classifies the traffic flow and either transmits the packets based upon the routing control table as usual, or determines that the packets of the traffic flow are to be forwarded to a forwarding border router. Upon determining that the packets are to be forwarded, the packets are encapsulated with a routing encapsulation key corresponding to a routing path and are forwarded from the anchoring border router to the forwarding border router via a routing encapsulation tunnel. When a forwarding border router receives the redirected packets over the routing encapsulation tunnel, the forwarding border router removes the routing encapsulation key from the packets of the traffic flow and transmits the packets via a routing path corresponding to the routing encapsulation key.

公开(公告)号：US20150071111A1

公开(公告)日：2015-03-12

申请号：US14022503

申请日：2013-09-10

Applicant: Cisco Technology, Inc.

Inventor： Gaofeng Tao ,  Alan Xiao-rong Wang ,  Yu Zhang ,  Dapeng Liu

IPC: H04L12/751 ,  H04L12/24

CPC classification number: H04L45/02 ,  H04L41/0816 ,  H04W36/18 ,  H04W36/385 ,  H04W76/12

Abstract: A software defined network controller detects when a host has moved between network elements in a network. The controller generates a list of network elements to which the host has roamed, the list being sorted by time when the host is attached to a network element so that a most recent network element to which the host is attached is the root network element and at a head of the list. The controller updates the root network element in the list first for traffic flow associated with the host. The controller sends commands to the network elements to program a tunnel from each previous point of attachment network element in the list to the most recent root network element in the list in reverse order of the roaming path so as to route traffic for the host via a tunnel.

Abstract translation: 软件定义的网络控制器检测主机何时在网络中的网元之间移动。 控制器生成主机已经漫游的网元的列表，该列表按主机被附加到网络元件的时间进行排序，使得主机附加的最新网络元素是根网元，并且在 名单的头。 控制器首先更新列表中的根网元，以便与主机相关联的流量。 控制器向网络元件发送命令以将隧道从列表中的每个先前连接网络元素编程到列表中的最新根网元件，其顺序与漫游路径相反，以便经由 隧道。

公开(公告)号：US20150043348A1

公开(公告)日：2015-02-12

申请号：US13964244

申请日：2013-08-12

Applicant: Cisco Technology, Inc.

Inventor： Xiaorong Wang ,  Dapeng Liu ,  Hunan Cao ,  Hongbo Xia

IPC: H04L12/741 ,  H04L12/28 ,  H04L12/803

CPC classification number: H04L45/745 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/38 ,  H04L45/50 ,  H04L45/74 ,  H04L47/125 ,  H04L47/20

Abstract: In response to receiving one or more packets from an interface, an anchoring border router classifies the traffic flow and either transmits the packets based upon the routing control table as usual, or determines that the packets of the traffic flow are to be forwarded to a forwarding border router. Upon determining that the packets are to be forwarded, the packets are encapsulated with a routing encapsulation key corresponding to a routing path and are forwarded from the anchoring border router to the forwarding border router via a routing encapsulation tunnel. When a forwarding border router receives the redirected packets over the routing encapsulation tunnel, the forwarding border router removes the routing encapsulation key from the packets of the traffic flow and transmits the packets via a routing path corresponding to the routing encapsulation key.

Abstract translation: 响应于从接口接收到一个或多个分组，锚定边界路由器对业务流进行分类，并根据路由控制表照常发送分组，或者确定业务流的分组将被转发到转发 边界路由器。 在确定要转发数据包时，将使用对应于路由路由的路由封装密钥封装数据包，并通过路由封装隧道从锚定边界路由器转发到转发边界路由器。 当转发边界路由器通过路由封装隧道接收到重定向报文时，转发边界路由器从业务流分组中删除路由封装密钥，并通过与路由封装密钥相对应的路由路径发送报文。

公开(公告)号：US09331941B2

公开(公告)日：2016-05-03

申请号：US13964244

申请日：2013-08-12

Applicant: Cisco Technology, Inc.

Inventor： Xiaorong Wang ,  Dapeng Liu ,  Hunan Cao ,  Hongbo Xia

IPC: H04L12/741 ,  H04L12/803 ,  H04L12/721 ,  H04L12/715

CPC classification number: H04L45/745 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/38 ,  H04L45/50 ,  H04L45/74 ,  H04L47/125 ,  H04L47/20

Abstract: In response to receiving one or more packets from an interface, an anchoring border router classifies the traffic flow and either transmits the packets based upon the routing control table as usual, or determines that the packets of the traffic flow are to be forwarded to a forwarding border router. Upon determining that the packets are to be forwarded, the packets are encapsulated with a routing encapsulation key corresponding to a routing path and are forwarded from the anchoring border router to the forwarding border router via a routing encapsulation tunnel. When a forwarding border router receives the redirected packets over the routing encapsulation tunnel, the forwarding border router removes the routing encapsulation key from the packets of the traffic flow and transmits the packets via a routing path corresponding to the routing encapsulation key.

Abstract translation: 响应于从接口接收到一个或多个分组，锚定边界路由器对业务流进行分类，并根据路由控制表照常发送分组，或者确定业务流的分组将被转发到转发 边界路由器。 在确定要转发数据包时，将使用对应于路由路由的路由封装密钥封装数据包，并通过路由封装隧道从锚定边界路由器转发到转发边界路由器。 当转发边界路由器通过路由封装隧道接收到重定向报文时，转发边界路由器从业务流分组中删除路由封装密钥，并通过与路由封装密钥相对应的路由路径发送报文。

公开(公告)号：US09137140B2

公开(公告)日：2015-09-15

申请号：US14022503

申请日：2013-09-10

Applicant: Cisco Technology, Inc.

Inventor： Gaofeng Tao ,  Alan Xiao-rong Wang ,  Yu Zhang ,  Dapeng Liu

IPC: H04L12/751 ,  H04L12/24 ,  H04W36/38 ,  H04W76/02

CPC classification number: H04L45/02 ,  H04L41/0816 ,  H04W36/18 ,  H04W36/385 ,  H04W76/12

Abstract: A software defined network controller detects when a host has moved between network elements in a network. The controller generates a list of network elements to which the host has roamed, the list being sorted by time when the host is attached to a network element so that a most recent network element to which the host is attached is the root network element and at a head of the list. The controller updates the root network element in the list first for traffic flow associated with the host. The controller sends commands to the network elements to program a tunnel from each previous point of attachment network element in the list to the most recent root network element in the list in reverse order of the roaming path so as to route traffic for the host via a tunnel.

Abstract translation: 软件定义的网络控制器检测主机何时在网络中的网元之间移动。 控制器生成主机已经漫游的网元的列表，该列表按主机被附加到网络元件的时间进行排序，使得主机附加的最新网络元素是根网元，并且在 名单的头。 控制器首先更新列表中的根网元，以便与主机相关联的流量。 控制器向网络元件发送命令以将隧道从列表中的每个先前连接网络元素编程到列表中的最新根网元件，其顺序与漫游路径相反，以便经由 隧道。

公开(公告)号：US20190268263A1

公开(公告)日：2019-08-29

申请号：US16291417

申请日：2019-03-04

Applicant: Cisco Technology, Inc.

Inventor： Alan Xiao-rong Wang ,  Dapeng Liu ,  Yu Zhang ,  Gaofeng Tao

IPC: H04L12/721 ,  H04L12/733 ,  H04L12/851 ,  H04L12/859 ,  H04L12/715

Abstract: Techniques whereby a LAN-side border router observes all packets of an application flow from both directions so that the application recognition performed on the LAN-side border router functions properly. A border router may implement flags in a flow cache to indicate whether the border router is the LAN-side border router and/or a WAN-side border router for an application flow. As packets are received at a border router at either the LAN interface or WAN interface, the flags associated with packet's application flows are examined to determine if the border router is the LAN-side border router for the application flow. If so, then application recognition and routing control may be performed. If not, the packet may be redirected to another border router that may be the LAN-side border router or the WAN-side border router for the application flow to insure that border router observes the packet.

公开(公告)号：US20150341254A1

公开(公告)日：2015-11-26

申请号：US14820730

申请日：2015-08-07

Applicant: Cisco Technology, Inc.

Inventor： Gaofeng Tao ,  Alan Xiao-rong Wang ,  Yu Zhang ,  Dapeng Liu

IPC: H04L12/751 ,  H04W76/02 ,  H04W36/18

CPC classification number: H04L45/02 ,  H04L41/0816 ,  H04W36/18 ,  H04W36/385 ,  H04W76/12

Abstract: A software defined network controller detects when a host has moved between network elements in a network. The controller generates a list of network elements to which the host has roamed, the list being sorted by time when the host is attached to a network element so that a most recent network element to which the host is attached is the root network element and at a head of the list. The controller updates the root network element in the list first for traffic flow associated with the host. The controller sends commands to the network elements to program a tunnel from each previous point of attachment network element in the list to the most recent root network element in the list in reverse order of the roaming path so as to route traffic for the host via a tunnel.