WO2011144042A2 - 路由信息的下发方法和边界设备 - Google Patents

路由信息的下发方法和边界设备 Download PDF

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Publication number
WO2011144042A2
WO2011144042A2 PCT/CN2011/074336 CN2011074336W WO2011144042A2 WO 2011144042 A2 WO2011144042 A2 WO 2011144042A2 CN 2011074336 W CN2011074336 W CN 2011074336W WO 2011144042 A2 WO2011144042 A2 WO 2011144042A2
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Prior art keywords
border device
border
learned
access control
area network
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PCT/CN2011/074336
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English (en)
French (fr)
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WO2011144042A3 (zh
Inventor
徐小虎
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华为技术有限公司
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Priority to PCT/CN2011/074336 priority Critical patent/WO2011144042A2/zh
Priority to CN201180000580.9A priority patent/CN102204186B/zh
Publication of WO2011144042A2 publication Critical patent/WO2011144042A2/zh
Publication of WO2011144042A3 publication Critical patent/WO2011144042A3/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4641Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/66Layer 2 routing, e.g. in Ethernet based MAN's

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a routing information sending method and a border device. Background technique
  • TRILL Transparent Interconnection of Lots of Links
  • ISIS intermediate system to intermediate system
  • IETF Internet Engineering Task Force
  • the TRILL device that is, the routing bridge (hereinafter referred to as RB) can be used to spread the media access control (Media Access Control; MAC address) of the host through the ISIS link state routing protocol.
  • Media Access Control Media Access Control
  • MAC address Media Access Control
  • Sexual information to avoid flooding a large number of unknown unicast packets within the TRILL network, thereby reducing the negative impact of data flooding on network performance.
  • the tunnel encapsulation technology is used in the TRILL scheme. Therefore, the TRILL core device only needs to install routes to other RBs. Therefore, the capacity of the routing and forwarding table of the TRILL core device is reduced, and there is no scalability problem of the routing forwarding table.
  • the TRILL border device that is, the edge RB
  • the TRILL border device still needs to install the MAC routing information of the hosts in the virtual local area network (VLAN) connected to the TRILL border device.
  • VLAN virtual local area network
  • the number of hosts usually reaches tens of thousands or even hundreds of thousands to millions.
  • TRILL border devices often face the scalability of routing and forwarding tables. The challenge.
  • the embodiment of the invention provides a routing information sending method and a border device, so as to improve the scalability of the routing forwarding table of the border device and save the routing forwarding table resource.
  • An embodiment of the present invention provides a method for sending routing information, including:
  • the border device determines a medium access control address of the at least one local host device that has learned the connection of the border device in the virtual local area network configured by itself;
  • the border device sends the media access control routing information corresponding to the virtual local area network learned from the remote border device saved in the intermediate system to the intermediate system link state database to the border device. Routing forwarding table.
  • the invention also provides a border device, comprising:
  • a determining module configured to determine whether a media access control address of the at least one local host device connected to the border device has been learned in the virtual local area network configured by the border device;
  • a sending module configured to: after the determining module determines that the media access control address of the at least one local host device connected to the border device has been learned in the virtual local area network configured by the border device, the intermediate system of the border device The medium access control routing information corresponding to the virtual local area network learned from the remote border device saved in the intermediate system link state database is sent to the routing forwarding table of the border device.
  • the edge device after the border device determines that the media access control address of the at least one local host device connected to the border device has been learned in the virtual local area network configured by the border device, the edge device will perform the ISIS link state of the border device.
  • the media access control routing information corresponding to the virtual local area network learned from the remote border device saved in the database is sent to the routing forwarding table of the border device. Therefore, the requirement for the routing device forwarding table capacity of the border device can be reduced, and the scalability of the routing forwarding table of the border device can be improved, thereby saving the routing and forwarding table.
  • FIG. 1 is a flowchart of an embodiment of a method for sending routing information according to the present invention
  • FIG. 2 is a schematic diagram of an embodiment of an application scenario of the present invention.
  • FIG. 3 is a flowchart of another embodiment of a method for sending routing information according to the present invention.
  • FIG. 4 is a schematic structural view of an embodiment of a boundary device according to the present invention.
  • FIG. 5 is a schematic structural view of another embodiment of a boundary device according to the present invention. detailed description
  • FIG. 1 is a flowchart of an embodiment of a method for sending routing information according to the present invention. As shown in FIG. 1 , the method for sending routing information may include:
  • Step 101 The border device determines the MAC address of at least one local host device that has been learned by the border device in the virtual local area network (VLAN).
  • VLAN virtual local area network
  • Step 102 The border device sends the MAC routing information corresponding to the VLAN learned by the remote border device stored in the ISIS link state database of the border device to the routing forwarding table of the border device.
  • the ISIS link state database is a topology information base, and the routing information in the route forwarding table is calculated according to the topology information in the ISIS link state database.
  • the border device after the border device determines that the MAC address of the at least one local host device connected to the border device has been learned in the VLAN configured by the border device, the border device saves the ISIS link state database of the border device.
  • the MAC routing information corresponding to the foregoing VLAN learned from the remote border device is sent to the routing forwarding table of the border device. Therefore, the requirement of the routing device forwarding table capacity of the border device can be reduced, and the scalability of the routing forwarding table of the border device can be improved, thereby saving the routing forwarding table resource.
  • the TRILL network includes a core device 3, a core device 4, and a core device 5, and a border device 1 and a border device 2.
  • the at least one local host device connected to the border device 1 includes a host A, a host B, and a host C, and the border device 2 is connected.
  • At least one local host device includes host D, host E, and host F; the VLAN configured by border device 1 and border device 2 in FIG. 2 is VLAN 10.
  • the border device 2 is the remote border device of the border device 1, and after the VLAN 10 configured by the border device 1 learns the MAC address of at least one of the host A, the host B, and the host C, The border device 1 sends the MAC routing information corresponding to the VLAN 10 learned from the border device 2 saved in the ISIS link state database of the border device 1 to the routing forwarding table of the border device 1. In addition, after the VLAN 10 configured by the border device 1 learns the MAC address of at least one of the host A, the host B, and the host C, the border device 1 automatically learns the MAC routing information corresponding to the VLAN 10 locally learned by the border device 1 A routing forwarding table sent to the border device 1.
  • the routing forwarding table of the border device 1 can be as shown in Table 1.
  • MAC A, MAC B, and MAC C are the MAC addresses of Host A, Host B, and Host C, respectively, and MAC D, MAC E, and MAC F are Host D, Host E, and Host, respectively.
  • Table 1 MAC A, MAC B, and MAC C are the MAC addresses of Host A, Host B, and Host C, respectively, and MAC D, MAC E, and MAC F are Host D, Host E, and Host, respectively.
  • the MAC routing information corresponding to VLAN 10 learned locally is the information in the second row of Table 1.
  • the MAC routing information corresponding to VLAN 10 learned from the border device 2 is the information in the third row of Table 1.
  • FIG. 2 is only an example of the application scenario of the present invention, and does not constitute a limitation of the present invention.
  • FIG. 3 is a flowchart of another embodiment of a method for sending routing information according to the present invention. As shown in FIG. 3, the method for sending routing information may include:
  • the border device monitors the learning status of the MAC address of the local host device connected to the border device by the configured VLAN.
  • the border device determines, in the VLAN configured by itself, whether the MAC address of the at least one local host device connected to the border device is learned.
  • the border device sends the MAC routing information corresponding to the VLAN that is learned by the remote border device saved in the ISIS link state database of the border device to the routing forwarding table of the border device.
  • the boundary device 1 configured from the remote border device (boundary device 2) saved in the ISIS link state database of the border device 1
  • the MAC routing information corresponding to VLAN 10 is the information in the third row of Table 1.
  • the border device does not send the MAC routing information corresponding to the foregoing VLAN that is learned by the remote border device saved in the ISIS link state database of the border device to the routing forwarding table of the border device.
  • the remote device does not save the ISIS link state database of the border device from the remote end.
  • the MAC address information corresponding to the foregoing VLAN that is learned by the border device is sent to the routing forwarding table of the border device, and the border device may also learn from the remote border device that is already existing in the routing forwarding table.
  • the MAC routing information corresponding to the VLAN is deleted.
  • the border device after the VLAN configured by the border device learns the MAC address of the at least one local host device connected to the border device, the border device automatically learns the MAC routing information corresponding to the VLAN locally learned by the border device.
  • the TRILL border device Take the TRILL border device as an example. If the TRILL border device (for example, the border device 1 in Figure 2) is configured with no MAC address of at least one local host device connected to the TRILL border device, that is, VLAN 10 is also If no local host device connected to the TRILL border device is found, the TRILL border device does not need to save the remote border device stored in the ISIS link state database of the TRILL border device (for example: the border device in Figure 2) 2) The learned MAC routing information corresponding to the VLAN 10 is sent to the routing forwarding table of the TRILL border device; otherwise, if the TRILL border device is configured in the VLAN 10, at least one local host device connected to the TRILL border device already exists.
  • the TRILL border device for example, the border device 1 in Figure 2
  • the TRILL border device does not need to save the remote border device stored in the ISIS link state database of the TRILL border device (for example: the border device in Figure 2)
  • the learned MAC routing information corresponding to the VLAN 10 is sent to the routing forward
  • the MAC address that is, the VLAN 10 has discovered at least one local host device connected to the TRILL border device, and the TRILL border device needs to learn from the remote border device saved in the ISIS link state database of the TRILL border device.
  • the MAC routing information corresponding to VLAN 10 is sent to the TRILL border device. Routing forwarding table.
  • the MAC routing information corresponding to the VLAN 10 learned from the remote border device saved in the ISIS link state database of the TRILL border device is sent by the remote TRILL border device to the TRILL border device.
  • the foregoing embodiment can reduce the requirement for the routing device forwarding table capacity of the border device, improve the scalability of the routing forwarding table of the border device, and further save the routing forwarding table resource.
  • the method for sending routing information can be applied not only to the TRILL protocol but also to Overlay Transport Virtualization (hereinafter referred to as OTV) or Shortest Path Bridge (Shortest Path Bridge; Hereinafter referred to as: SPB), etc.
  • Layer 2 (L2) network technology scheme that uses ISIS to spread host MAC reachability information.
  • FIG. 4 is a schematic structural diagram of an embodiment of a border device according to the present invention.
  • the border device in this embodiment may implement the process of the embodiment shown in FIG. 1 of the present invention.
  • the border device may include:
  • a determining module 41 configured to determine, in a VLAN configured by the border device, whether a MAC address of the at least one local host device connected to the border device has been learned;
  • the sending module 42 is configured to save the border device in the ISIS link state database after the determining module 41 determines that the MAC address of the at least one local host device connected to the border device has been learned in the VLAN configured by the border device.
  • the MAC routing information corresponding to the foregoing VLAN learned from the remote border device is sent to the routing forwarding table of the border device.
  • the sending module 42 After the determining module 41 determines that the MAC address of the at least one local host device connected to the border device has been learned in the VLAN configured by itself, the sending module 42 The MAC routing information corresponding to the foregoing VLAN learned from the remote border device saved in the ISIS link state database of the border device is sent to the routing forwarding table of the border device. Therefore, the requirement for the routing device forwarding table capacity of the border device can be reduced, and the scalability of the routing forwarding table of the border device can be improved, thereby saving the routing forwarding table resource.
  • FIG. 5 is a schematic structural diagram of another embodiment of the boundary device according to the present invention.
  • the boundary device in this embodiment can implement the flow of the embodiment shown in FIG. 1 and FIG. 3 of the present invention.
  • the sending module 42 does not learn the ISIS chain of the border device after the determining module 41 determines that the MAC address of any local host device connected to the border device is not learned in the VLAN configured by the border device.
  • the MAC routing information corresponding to the foregoing VLAN learned from the remote border device saved in the path state database is sent to the routing forwarding table of the border device.
  • the border device may further include: a deleting module 43, after the determining module 41 determines that the MAC address of any local host device connected to the border device is not learned in the VLAN configured by the border device, The MAC routing information corresponding to the VLAN learned from the remote border device that has existed in the routing forwarding table of the border device is deleted.
  • the border device may further include: a monitoring module 44, configured to monitor, in a VLAN configured by the border device, a learning situation of a MAC address of a local host device connected to the border device, where the determining module 41 is configured according to The learning situation determines whether the MAC address of at least one local host device connected to the border device has been learned in the VLAN configured by the border device.
  • a monitoring module 44 configured to monitor, in a VLAN configured by the border device, a learning situation of a MAC address of a local host device connected to the border device, where the determining module 41 is configured according to The learning situation determines whether the MAC address of at least one local host device connected to the border device has been learned in the VLAN configured by the border device.
  • the edge device does not use the ISIS link of the border device.
  • the MAC routing information corresponding to the foregoing VLAN learned from the remote border device saved in the state database is sent to the routing forwarding table of the border device.
  • the foregoing boundary device can reduce the requirement for the routing device forwarding table capacity of the border device, improve the scalability of the routing forwarding table of the border device, and further save the routing forwarding table resource.
  • a person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

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Abstract

本发明提供一种路由信息的下发方法和边界设备,该路由信息的下发方法包括:边界设备确定自身配置的VLAN内已学习到该边界设备连接的至少一个本地主机设备的MAC地址(101);边界设备将该边界设备的ISIS链路状态数据库中保存的从远端边界设备学习到的与上述VLAN对应的MAC路由信息下发到上述边界设备的路由转发表。本发明实施例可以降低对边界设备路由转发表容量的需求,提高边界设备的路由转发表的可扩展性,进而可以节省路由转发表资源。

Description

路由信息的下发方法和边界设备
技术领域
本发明实施例涉及通信技术领域, 尤其涉及一种路由信息的下发方法和 边界设备。 背景技术
多链路透明互联 ( Transparent Interconnection of Lots of Links; 以下简 称: TRILL ) 是一种使用中间系统至中间系统 ( Intermediate System to Intermediate System; 以下简称: ISIS )链路状态路由协议提供二层桥网络 功能的因特网工程任务组 ( Internet Engineering Task Force; 以下简称: IETF ) 标准协议。
现有 TRILL方案中, TRILL设备, 也就是路由桥 ( Routing Bridge; 以下简称: RB ) 可以通过 ISIS链路状态路由协议来扩散主机的媒介访问 控制 ( Media Access Control; 以下简称: MAC )地址可达性信息, 避免在 TRILL网络范围内广播洪泛大量的未知单播数据包,从而可以减小数据洪 泛对网络性能的负面影响。 TRILL方案中使用了隧道封装技术, 从而使得 TRILL核心设备只需要安装到达其他 RB的路由即可,因此 TRILL核心设 备的路由转发表容量需求被降低, 不存在路由转发表可扩展性问题。 但是 TRILL边界设备, 即边界路由桥( edge RB )仍然需要安装与该 TRILL边 界设备连接的所有虚拟局域网 (Virtual Local Area Network; 以下简称: VLAN ) 内的主机的 MAC路由信息。 在大型数据中心中, 主机数量通常 都达到上万台甚至几十万台到几百万台,在应用 TRILL技术构建大二层数 据中心网络时, TRILL 边界设备往往面临路由转发表可扩展性方面的挑 战。
但是现有技术中, TRILL边界设备的路由转发表的可扩展性较差, 并 存在路由转发表资源浪费的问题。 发明内容
本发明实施例提供一种路由信息的下发方法和边界设备, 以提高边界设 备的路由转发表的可扩展性, 节省路由转发表资源。
本发明实施例提供一种路由信息的下发方法, 包括:
边界设备确定自身配置的虚拟局域网内已学习到所述边界设备连接 的至少一个本地主机设备的媒介访问控制地址;
所述边界设备将所述边界设备的中间系统至中间系统链路状态数据 库中保存的从远端边界设备学习到的与所述虚拟局域网对应的媒介访问 控制路由信息下发到所述边界设备的路由转发表。
本发明还提供一种边界设备, 包括:
确定模块, 用于确定所述边界设备配置的虚拟局域网内是否已学习到 所述边界设备连接的至少一个本地主机设备的媒介访问控制地址;
下发模块, 用于在所述确定模块确定所述边界设备配置的虚拟局域网 内已学习到所述边界设备连接的至少一个本地主机设备的媒介访问控制 地址之后, 将所述边界设备的中间系统至中间系统链路状态数据库中保存 的从远端边界设备学习到的与所述虚拟局域网对应的媒介访问控制路由 信息下发到所述边界设备的路由转发表。
通过本发明实施例, 在边界设备确定自身配置的虚拟局域网内已学习 到该边界设备连接的至少一个本地主机设备的媒介访问控制地址之后, 该 边界设备才会将该边界设备的 ISIS 链路状态数据库中保存的从远端边界 设备学习到的与上述虚拟局域网对应的媒介访问控制路由信息下发到该 边界设备的路由转发表。 从而可以降低对边界设备路由转发表容量的需 求, 提高边界设备的路由转发表的可扩展性, 进而可以节省路由转发表资 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在 不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明路由信息的下发方法一个实施例的流程图;
图 2为本发明应用场景一个实施例的示意图;
图 3为本发明路由信息的下发方法另一个实施例的流程图;
图 4为本发明边界设备一个实施例的结构示意图;
图 5为本发明边界设备另一个实施例的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于 本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动的前提下所 获得的所有其他实施例, 都属于本发明保护的范围。
图 1为本发明路由信息的下发方法一个实施例的流程图, 如图 1所示, 该路由信息的下发方法可以包括:
步骤 101 , 边界设备确定自身配置的虚拟局域网 (Virtual Local Area Network; 以下简称: VLAN ) 内已学习到该边界设备连接的至少一个本地 主机设备的 MAC地址。
步骤 102, 边界设备将该边界设备的 ISIS链路状态数据库中保存的从 远端边界设备学习到的与上述 VLAN对应的 MAC路由信息下发到上述边 界设备的路由转发表。 其中, ISIS链路状态数据库是拓朴信息库, 路由转发表中的路由信息 是根据 ISIS链路状态数据库中的拓朴信息计算出来的。
上述实施例中,在边界设备确定自身配置的 VLAN内已学习到该边界 设备连接的至少一个本地主机设备的 MAC地址之后, 该边界设备才会将 该边界设备的 ISIS 链路状态数据库中保存的从远端边界设备学习到的与 上述 VLAN对应的 MAC路由信息下发到该边界设备的路由转发表。 从而 可以降低对边界设备路由转发表容量的需求, 提高边界设备的路由转发表 的可扩展性, 进而可以节省路由转发表资源。
图 2为本发明应用场景一个实施例的示意图, 本发明图 1所示实施例 提供的路由信息的下发方法可以应用在图 2所示场景中,以 TRILL网络为 例, 如图 2所示, TRILL网络中包括核心设备 3、 核心设备 4和核心设备 5 , 以及边界设备 1和边界设备 2; 边界设备 1连接的至少一个本地主机设 备包括主机 A、 主机 B和主机 C, 边界设备 2连接的至少一个本地主机设 备包括主机 D、 主机 E和主机 F; 图 2中的边界设备 1和边界设备 2配置 的 VLAN为 VLAN 10。
本实施例中, 对于边界设备 1来说, 边界设备 2为边界设备 1的远端 边界设备, 在边界设备 1配置的 VLAN 10学习到主机 A、 主机 B和主机 C中至少一个的 MAC地址之后, 边界设备 1才会将该边界设备 1的 ISIS 链路状态数据库中保存的从边界设备 2学习到的与 VLAN 10对应的 MAC 路由信息下发到边界设备 1 的路由转发表。 另外, 在边界设备 1 配置的 VLAN 10学习到主机 A、 主机 B和主机 C中至少一个的 MAC地址之后 , 边界设备 1 自动将该边界设备 1本地学习到的与 VLAN 10对应的 MAC路 由信息下发到边界设备 1的路由转发表。
本实施例中, 边界设备 1的路由转发表可以如表 1所示。
表 1中, MAC A、 MAC B和 MAC C分别为主机 A、 主机 B和主机 C 的 MAC地址, MAC D、 MAC E和 MAC F分别为主机 D、 主机 E和主机 表 1
Figure imgf000007_0001
F的 MAC地址。 其中, 本地学习到的与 VLAN 10对应的 MAC路由信息 为表 1第 2行中的信息, 从边界设备 2学习到的与 VLAN 10对应的 MAC 路由信息为表 1第 3行中的信息。
当然, 图 2所示的应用场景仅为本发明应用场景的一个示例, 并不构 成对本发明的限定。
图 3为本发明路由信息的下发方法另一个实施例的流程图, 如图 3所 示, 该路由信息的下发方法可以包括:
301 , 边界设备监测自身配置的 VLAN对该边界设备连接的本地主机 设备的 MAC地址的学习情况。
302, 边界设备确定自身配置的 VLAN内是否学习到该边界设备连接 的至少一个本地主机设备的 MAC地址。
如果已学习到, 则执行 303; 如果边界设备确定自身配置的 VLAN内 未学习到该边界设备连接的任何一个本地主机设备的 MAC地址, 则执行 304。
303 , 边界设备将该边界设备的 ISIS链路状态数据库中保存的从远端 边界设备学习到的与上述 VLAN对应的 MAC路由信息下发到上述边界设 备的路由转发表。
参见图 2和表 1 , 以边界设备 1为例, 边界设备 1的 ISIS链路状态数 据库中保存的从远端边界设备(边界设备 2 ) 学习到的与边界设备 1配置 的 VLAN 10对应的 MAC路由信息为表 1第 3行中的信息。
304, 边界设备不将该边界设备的 ISIS链路状态数据库中保存的从远 端边界设备学习到的与上述 VLAN对应的 MAC路由信息下发到上述边界 设备的路由转发表。
本实施例中, 在边界设备确定自身配置的 VLAN内未学习到该边界设备 连接的任何一个本地主机设备的 MAC地址之后, 除不将该边界设备的 ISIS 链路状态数据库中保存的从远端边界设备学习到的与上述 VLAN 对应的 MAC路由信息下发到上述边界设备的路由转发表之夕卜,该边界设备还可以将 路由转发表中已经存在的从远端边界设备学习到的与该 VLAN对应的 MAC 路由信息删除。
另外, 本实施例中, 在边界设备配置的 VLAN学习到该边界设备连接的 至少一个本地主机设备的 MAC地址之后, 该边界设备自动将该边界设备本 地学习到的与上述 VLAN对应的 MAC路由信息下发到该边界设备的路由转 发表。参见图 2和表 1 ,以边界设备 1为例,边界设备 1本地学习到的与 VLAN 10对应的 MAC路由信息为表 1第 2行中的信息。
以 TRILL边界设备为例, 如果 TRILL边界设备 (例如: 图 2中的边界设 备 1 )配置的 VLAN 10内没有该 TRILL边界设备连接的至少一个本地主机设 备的 MAC地址, 也就是说, VLAN 10还没有发现该 TRILL边界设备连接的 任何一个本地主机设备,那么该 TRILL边界设备就不需要将该 TRILL边界设 备的 ISIS链路状态数据库中保存的从远端边界设备 (例如: 图 2中的边界设 备 2 )学习到的与 VLAN 10对应的 MAC路由信息下发到该 TRILL边界设备 的路由转发表;反之,如果 TRILL边界设备配置的 VLAN 10内已有该 TRILL 边界设备连接的至少一个本地主机设备的 MAC地址, 也就是说, VLAN 10 已发现该 TRILL边界设备连接的至少一个本地主机设备,那么该 TRILL边界 设备就需要将该 TRILL边界设备的 ISIS链路状态数据库中保存的从远端边界 设备学习到的与 VLAN 10对应的 MAC路由信息下发到该 TRILL边界设备的 路由转发表。
其中,该 TRILL边界设备的 ISIS链路状态数据库中保存的从远端边界设 备学习到的与 VLAN 10对应的 MAC路由信息是由远端 TRILL边界设备发送 给该 TRILL边界设备的。
上述实施例可以降低对边界设备路由转发表容量的需求, 提高边界设备 的路由转发表的可扩展性, 进而可以节省路由转发表资源。
需要说明的是, 本发明实施例提供的路由信息的下发方法不仅可以适用 于 TRILL协议, 也适用于叠加传送虚拟化( Overlay Transport Virtualization; 以下简称: OTV )或最短路径桥(Shortest Path Bridge; 以下简称: SPB )等 使用 ISIS来扩散主机 MAC可达性信息的层 2 ( L2 ) 网络技术方案。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述 的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介 质。
图 4为本发明边界设备一个实施例的结构示意图, 本实施例中的边界 设备可以实现本发明图 1所示实施例的流程, 如图 4所示, 该边界设备可 以包括:
确定模块 41 , 用于确定该边界设备配置的 VLAN 内是否已学习到该 边界设备连接的至少一个本地主机设备的 MAC地址;
下发模块 42, 用于在确定模块 41确定该边界设备配置的 VLAN内已 学习到该边界设备连接的至少一个本地主机设备的 MAC地址之后, 将该 边界设备的 ISIS 链路状态数据库中保存的从远端边界设备学习到的与上 述 VLAN对应的 MAC路由信息下发到该边界设备的路由转发表。
上述实施例中, 确定模块 41确定自身配置的 VLAN内已学习到该边 界设备连接的至少一个本地主机设备的 MAC地址之后,下发模块 42才会 将该边界设备的 ISIS 链路状态数据库中保存的从远端边界设备学习到的 与上述 VLAN对应的 MAC路由信息下发到该边界设备的路由转发表。 从 而可以降低对边界设备路由转发表容量的需求, 提高边界设备的路由转发 表的可扩展性, 进而可以节省路由转发表资源。
图 5为本发明边界设备另一个实施例的结构示意图, 本实施例中的边 界设备可以实现本发明图 1和图 3所示实施例的流程。
举例来说, 本实施例中, 下发模块 42在确定模块 41确定边界设备配 置的 VLAN 内未学习到上述边界设备连接的任何一个本地主机设备的 MAC地址之后, 不将该边界设备的 ISIS链路状态数据库中保存的从远端 边界设备学习到的与上述 VLAN对应的 MAC路由信息下发到该边界设备 的路由转发表。
举例来说, 进一步地, 该边界设备还可以包括, 删除模块 43 , 用于在 确定模块 41确定该边界设备配置的 VLAN内未学习到该边界设备连接的 任何一个本地主机设备的 MAC地址之后, 将该边界设备的路由转发表中 已经存在的从远端边界设备学习到的与 VLAN对应的 MAC路由信息删 除。
举例来说, 进一步地, 该边界设备还可以包括, 监测模块 44, 用于监测 该边界设备配置的 VLAN内对上述边界设备连接的本地主机设备的 MAC地 址的学习情况,以供确定模块 41根据该学习情况确定边界设备配置的 VLAN 内是否已学习到上述边界设备连接的至少一个本地主机设备的 MAC地址。
举例来说, 本实施例中在确定模块 41确定该边界设备配置的 VLAN内 未学习到该边界设备连接的任何一个本地主机设备的 MAC地址之后, 该边 界设备不将该边界设备的 ISIS链路状态数据库中保存的从远端边界设备学习 到的与上述 VLAN对应的 MAC路由信息下发到该边界设备的路由转发表。
上述边界设备可以降低对边界设备路由转发表容量的需求, 提高边界 设备的路由转发表的可扩展性, 进而可以节省路由转发表资源。 本领域技术人员可以理解附图只是一个优选实施例的示意图, 附图中 的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描述 进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实施例的一 个或多个装置中。 上述实施例的模块可以合并为一个模块, 也可以进一步拆 分成多个子模块。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修 改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种路由信息的下发方法, 其特征在于, 包括:
边界设备确定自身配置的虚拟局域网内已学习到所述边界设备连接 的至少一个本地主机设备的媒介访问控制地址;
所述边界设备将所述边界设备的中间系统至中间系统链路状态数据 库中保存的从远端边界设备学习到的与所述虚拟局域网对应的媒介访问 控制路由信息下发到所述边界设备的路由转发表。
2、 根据权利要求 1所述的方法, 其特征在于, 还包括:
如果所述边界设备确定自身配置的虚拟局域网内未学习到所述边界 设备连接的任何一个本地主机设备的媒介访问控制地址, 则不将所述边界 设备的中间系统至中间系统链路状态数据库中保存的从远端边界设备学 习到的与所述虚拟局域网对应的媒介访问控制路由信息下发到所述边界 设备的路由转发表。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 还包括: 如果所述边界设备确定自身配置的虚拟局域网内未学习到所述边界 设备连接的任何一个本地主机设备的媒介访问控制地址, 则所述边界设备 将所述边界设备的路由转发表中已经存在的从远端边界设备学习到的与 所述虚拟局域网对应的媒介访问控制路由信息删除。
4、 根据权利要求 1或 2所述的方法, 其特征在于, 所述边界设备确 定自身配置的虚拟局域网内已学习到所述边界设备连接的至少一个本地 主机设备的媒介访问控制地址之前, 还包括:
所述边界设备监测自身配置的虚拟局域网对所述边界设备连接的本 地主机设备的媒介访问控制地址的学习情况, 以供所述边界设备根据所述 学习情况确定自身配置的虚拟局域网内已学习到所述边界设备连接的至 少一个本地主机设备的媒介访问控制地址。
5、 一种边界设备, 其特征在于, 包括:
确定模块, 用于确定所述边界设备配置的虚拟局域网内是否已学习到 所述边界设备连接的至少一个本地主机设备的媒介访问控制地址;
下发模块, 用于在所述确定模块确定所述边界设备配置的虚拟局域网 内已学习到所述边界设备连接的至少一个本地主机设备的媒介访问控制 地址之后, 将所述边界设备的中间系统至中间系统链路状态数据库中保存 的从远端边界设备学习到的与所述虚拟局域网对应的媒介访问控制路由 信息下发到所述边界设备的路由转发表。
6、 根据权利要求 5所述的边界设备, 其特征在于,
所述下发模块在所述确定模块确定所述边界设备配置的虚拟局域网 内未学习到所述边界设备连接的任何一个本地主机设备的媒介访问控制 地址之后, 不将所述边界设备的中间系统至中间系统链路状态数据库中保 存的从远端边界设备学习到的与所述虚拟局域网对应的媒介访问控制路 由信息下发到所述边界设备的路由转发表。
7、 根据权利要求 5或 6所述的边界设备, 其特征在于, 还包括: 删除模块, 用于在所述确定模块确定所述边界设备配置的虚拟局域网 内未学习到所述边界设备连接的任何一个本地主机设备的媒介访问控制 地址之后, 将所述边界设备的路由转发表中已经存在的从远端边界设备学 习到的与所述虚拟局域网对应的媒介访问控制路由信息删除。
8、 根据权利要求 5或 6所述的边界设备, 其特征在于, 还包括: 监测模块, 用于监测所述边界设备配置的虚拟局域网对所述边界设备 连接的本地主机设备的媒介访问控制地址的学习情况, 以供所述确定模块 根据所述学习情况确定所述边界设备配置的虚拟局域网内是否已学习到 所述边界设备连接的至少一个本地主机设备的媒介访问控制地址。
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