WO2013004140A1 - 避免端系统地址分发信息协议报文风暴的方法及路由网桥 - Google Patents

避免端系统地址分发信息协议报文风暴的方法及路由网桥 Download PDF

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Publication number
WO2013004140A1
WO2013004140A1 PCT/CN2012/077664 CN2012077664W WO2013004140A1 WO 2013004140 A1 WO2013004140 A1 WO 2013004140A1 CN 2012077664 W CN2012077664 W CN 2012077664W WO 2013004140 A1 WO2013004140 A1 WO 2013004140A1
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Prior art keywords
routing bridge
lsp
neighbor
newly added
esadi
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PCT/CN2012/077664
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English (en)
French (fr)
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胡方伟
翟洪军
成明江
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中兴通讯股份有限公司
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Priority to EP12807947.2A priority Critical patent/EP2728815B1/en
Publication of WO2013004140A1 publication Critical patent/WO2013004140A1/zh

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    • 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/32Flooding

Definitions

  • the present invention relates to network communication technologies, and in particular, to a method and a routing bridge for avoiding End Office Address Distribution Information (ESADI) protocol.
  • ESADI End Office Address Distribution Information
  • TRILL Transparent Interconnection over Lots of Links
  • IETF Internet Engineering Task Force
  • RBridge On a TRILL network, the device running the TRILL protocol is called RBridge.
  • the devices such as hosts and servers attached to the RBridge are called End Stations (ES).
  • ES End Stations
  • RBridge needs to provide services to the ES provider system. Therefore, RBridge needs to have a certain understanding of the MAC (Media Access Control) information of the ES in the network.
  • MAC Media Access Control
  • RBridge obtains MAC information mainly through the following methods:
  • the self-learning method is the easiest, the resource consumption is the smallest, but the timeliness is poor; the registration method can only learn the MAC information of the local end system, and the end system also needs to support the registration protocol; ESADI only runs on the RBridge and actively publishes the local MAC. Information, ESADI's RBridge enabled It can understand the changes of MAC information on other RBridges in a timely manner, and has the advantages of high credibility and low resource occupation. It is one of the main ways to learn MAC information between RBridges.
  • ESADI protocol packets are encapsulated as TRILL data packets, and ESADI routing bridges exchange information by sending ESADI protocols to form logical interconnections.
  • the ESADI protocol packet is sent along the distribution tree in the manner of TRILL multicast data packets.
  • the entire TRILL network of the virtual local area network (VLAN) of the ESADI is traversed. This type of packet transmission wastes a lot of bandwidth.
  • VLAN virtual local area network
  • the ESADI routing bridge sends a LSP (Link State Protocol Data Unit) packet to the network in a multicast manner, where the bridge carries the bridge.
  • LSP Link State Protocol Data Unit
  • the number of LSPs is so large that a multicast storm is formed.
  • the LSP packet is sent to the CPU (Central Processing Unit) of the routing bridge for processing.
  • the large number of LSP packets will increase the CPU load and even crash the CPU. , which has a huge impact on devices and networks. Summary of the invention
  • the purpose of the embodiments of the present invention is to provide a method for avoiding ESDIA protocol packet storms and a routing bridge to overcome the defects that a large number of LSPs reported in the prior art have a great impact on devices and networks.
  • the embodiment of the present invention provides a method for avoiding the storm of the end system address distribution information protocol packet, including:
  • LSP link state protocol data unit
  • routing bridge finds the newly added neighbor, determining the delay of sending the LSP according to the priority of the routing bridge;
  • the routing bridge After the routing bridge discovers the newly added neighbor, it sends the station after the delay period LSP message.
  • the high-priority routing bridge determines that the delay duration value is less than the delay duration value determined by the low-priority routing bridge.
  • the LSP message sent by the routing bridge to the neighbor carries the link state information generated by the device.
  • the routing bridge discovers newly added neighbors, including:
  • the routing bridge receives the LSP packet sent by the newly added neighbor.
  • the embodiment of the present invention further provides a routing bridge for avoiding an end protocol address distribution information protocol packet storm, including:
  • a discovery module that is set to discover newly joined neighbors
  • a sending module configured to send a link state protocol data sheet t (LSP) to the neighbor in a unicast manner.
  • LSP link state protocol data sheet
  • the sending module is configured to: determine, according to a priority of the routing bridge, a delay duration of sending the LSP, and send an LSP to the neighbor in a unicast manner after the delay duration Text.
  • the sending module is configured to determine a delay duration value for the high priority routing bridge that is less than a delay duration value determined for the low priority routing bridge.
  • the LSP message sent by the sending module to the neighbor carries the link state information generated by the routing bridge device.
  • the discovery module is set to
  • the newly added neighbor is discovered by receiving the LSP that is sent by the newly added neighbor.
  • the embodiment of the present invention prevents the generation of a multicast storm, avoids a large impact on the device, and improves the stability and robustness of the device and the network.
  • FIG. 1 is a flowchart of a method for avoiding a storm of an ESADI protocol packet according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a routing bridge according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a topology structure of an ESADI network in an application example of the present invention. Preferred embodiment of the invention
  • a method for avoiding the storm of the ESADI protocol packet includes:
  • Step 10 The RBridge in the ESADI network discovers the neighbor newly added to the network; that is, the RBridge receives the LSP packet sent by the RBridge device newly joining the network;
  • Step 11 The RBridge sends an LSP message to the neighbor in a unicast manner.
  • the RBridge sends the LSP message after a delay period, where the delay time for sending the LSP message to the neighbor is according to the present invention.
  • the priority of the routing bridge is determined.
  • the high-priority RBridge determines that the delay duration value is less than the delay duration value determined by the low-priority Rbridge, and the delay duration value can be zero.
  • the LSPs sent by the RBridges in the ESADI network only carry the locally generated link state information, and do not include the link state information received from the neighbor device. .
  • the addition of the above RBridge device to the ESADI network can be achieved by enabling the ESADI function via the RBridge device or by enabling the ESADI-enabled RBridge device to be booted.
  • the above method uses the unicast method and does not send the LSP "Multicast" in a multicast manner.
  • the number of LSPs in the network is greatly reduced, and the sending time of the LSPs is determined according to the priority value. This prevents multiple ESADI bridges from simultaneously transmitting LSPs, and solves the ESADI protocol packet. The problem of broadcasting the storm.
  • a routing bridge that avoids the storm of the end system address distribution information protocol packet includes:
  • the discovery module 20 is configured to discover newly added neighbors
  • the delay duration is sent to the neighbor in an unicast manner after the delay period elapses.
  • the delay duration value determined by the sending module 21 for the high priority routing bridge is less than the delay duration value determined for the low priority routing bridge.
  • the LSP message sent by the sending module 21 to the neighbor carries the link state information generated by the routing bridge device.
  • the discovery module 20 is configured to discover the newly added neighbor by receiving the LSP message sent by the newly added neighbor.
  • RB1, RB2, and RB3 are ESADI routing bridges, where RB2 is DRB (Designated Routing Bridge).
  • RB1, RB2, and RB3 span a network composed of multiple transmission RBs (Route Bridges).
  • ESADI protocol packets are transmitted in the network as TRILL data, and are encapsulated and solved only in RB 1, RB2, and RB3. Encapsulation, which forms a logical interconnection between them.
  • RB4 is the new RBridge that joins the current ESADI network.
  • RB4 When the RB4 enables the ESADI function, Or RB4 with ESADI function is started, RB4 sends LSP 0 segment (segment) to the network in multicast mode, and LSP 0 segment carries ESADI parameters of RB4, such as: priority information, holding time Wait.
  • the destination MAC address of the header of the ESADI LSP packet is the multicast address "All-RBridges multicast address". Therefore, the ESADI LSP packet traverses the ESADI along the direction of the distributed tree. All ESADI RBridges in the VLAN-x where the network is located, ie RB 1 ⁇ RB3 in the figure,
  • RB1 ⁇ RB3 will also respond to RB4 with the ESADI LAP message of the multicast address "All-RBridges multicast address".
  • the RBridge in the ESADI network where the VLAN-x is located receives the packet, and the LSP packet carries the information such as the MAC address of the end system to which the ESADI RBridge is attached.
  • the number of LSPs attached to the RBridge is very large. Therefore, the number of LSPs is very large. This may cause a large number of ESADI LSPs to occur in the network, causing multicast storms.
  • the RBI, the RB2, and the RB3 determine the time of the device to respond to the LSP according to the value of the priority. Because RB2 is the DRB and has the highest priority, RB2 first sends LSPs in unicast mode. The packet contains information such as the MAC address of all end systems to which RB2 is attached. As the LSP is sent to the unicast address, RB1 and RB3 will not receive the LSP. Only the newly added RB4 will receive the LSP. RB1 or RB3 will also send LSPs after a corresponding delay. This will not cause an instantaneous multicast packet storm and improve the stability of the device and network.
  • the embodiments of the present invention prevent the generation of multicast storms, avoid large impact on devices, and improve the stability and robustness of devices and networks.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

一种避免端系统地址分发信息协议报文风暴的方法和装置,该方法包括:当路由网桥发现新加入的邻居后,以单播的方式向所述邻居发送链路状态协议数据单元报文。该方法和装置防止了组播风暴的产生,避免对设备产生大的影响,提高了设备和网络的稳定性和鲁棒性。

Description

避免端系统地址分发信息协议报文风暴的方法及路由网桥
技术领域
本发明涉及网络通信技术,尤其涉及一种避免端系统地址分发信息(End Station Address Distribution Information, 简称 ESADI )协议 4艮文风暴的方法及 路由网桥。
背景技术
TRILL ( Transparent Interconnection over Lots of Links, 多链接透明互连) 是 IETF ( Internet Engineering Task Force , 互联网工程任务组)推荐的标准, 用于解决大型数据中心中 STP ( Spanning Tree protocol,生成树协议 )的不足。 在 L2网络中, STP通过阻塞冗余链路来避免环路, 但同时也造成了冗余链路 带宽的浪费(被阻塞)。 TRILL通过将 IS-IS( Intermediate System to Intermediate System, 中间系统到中间系统 )路由选择协议引入 L2网络, 解决了 L2的环 路问题, 同时保留了 L2多路径,或称为 ECMP ( Equivalent Cost Multiple Path , 等价多路径) 。
在 TRILL网络中, 运行 TRILL协议的设备称为 RBridge (路由网桥) , 挂接在 RBridge上的主机、服务器等设备称为端系统(End Station,简称 ES )。 在 TRILL网络的出入口处, RBridge需要对 ES提供端系统服务,因此 RBridge 需要对网络中 ES的 MAC ( Media Access Control, 介质访问控制 )信息有一 定的了解。
目前, RBridge获取 MAC信息主要通过如下方式:
1 ) 自学习方式: 通过 TRILL数据帧的封装 /解封装学习 MAC地址信息;
2 )启用 ESADI协议, 相互通告和学习 MAC信息;
3 )通过端系统注册的方式学习 MAC信息。
其中, 自学习方式最简便、 资源消耗最小, 但及时性差; 注册方式只能 学习到本地端系统的 MAC信息, 而且端系统也需要支持注册协议; ESADI 只运行在 RBridge上,通过主动发布本地 MAC信息,启用了 ESADI的 RBridge 就能及时地了解到其他 RBridge上的 MAC信息的变化,具有可信度高、 资源 占用少等优点, 是 RBridge之间学习 MAC信息的主要方式之一。
在目前的 TRILL协议中, ESADI协议报文作为 TRILL的数据报文进行封 装, ESADI路由网桥之间通过发送 ESADI协议 4艮文进行信息的交互, 形成逻 辑上的互联。 ESADI协议报文以 TRILL的组播数据报文的方式沿着分发树发 送, 遍历该 ESADI所在 VLAN ( Virtual Local Area Network, 虚拟局域网)的 整个 TRILL 网络, 这种报文发送方式浪费了大量的带宽, 尤其是在有新的 ESADI路由网桥加入网络时, 容易形成 ESADI协议报文风暴。 当有新的 ESADI路由网桥加入时,该 ESADI路由网桥会以组播的方式向网络发送 LSP ( Link State Protocol Data Unit, 链路状态协议数据单元 )报文, 其中携带有 该网桥所附着的端系统的 MAC地址信息; 其他 ESADI网桥在收到该网桥的 LSP报文后, 也会以组播的方式向网络发送 LSP报文。 当网络规模比较大, 且路由网桥附着的端系统比较多的时候, LSP报文的数量会非常大, 以至于 会形成组播风暴。而 LSP报文作为 ESADI协议报文,会上送路由网桥的 CPU ( Central Processing Unit, 中央处理器)进行处理, 大量的 LSP报文上送会在 瞬间加重 CPU的负担, 甚至会使 CPU崩溃, 对设备和网络造成极大的影响。 发明内容
本发明实施例的目的在于提供一种避免 ESADI协议报文风暴的方法及路 由网桥, 以克服现有技术中大量 LSP报文上报对设备和网络造成极大影响的 缺陷。
为解决上述问题, 本发明实施例提供了一种避免端系统地址分发信息协 议报文风暴的方法, 包括:
当路由网桥发现新加入的邻居后, 以单播的方式向所述邻居发送链路状 态协议数据单元(LSP )报文。
可选的, 该路由网桥发现新加入的邻居后, 根据本路由网桥的优先级确 定发送所述 LSP报文的延迟时长;
其中, 当路由网桥发现新加入的邻居后是在经过所述延迟时长后发送所 述 LSP报文。
可选的, 高优先级的路由网桥确定出的延迟时长值小于低优先级的路由 网桥确定出的延迟时长值。
可选的,
所述路由网桥向所述邻居发送的 LSP报文中携带有本设备产生的链路状 态信息。
可选的,
所述路由网桥发现新加入的邻居, 包括:
所述路由网桥收到所述新加入的邻居发来的 LSP报文。
相应地, 本发明实施例还提供了一种避免端系统地址分发信息协议报文 风暴的路由网桥, 包括:
发现模块, 其设置为发现新加入的邻居; 以及
发送模块, 其设置为以单播的方式向所述邻居发送链路状态协议数据单 t ( LSP )才艮文。
可选的, 所述发送模块是设置为: 根据本路由网桥的优先级确定发送所 述 LSP ^ l的延迟时长, 在经过所述延迟时长后以单播的方式向所述邻居发 送 LSP报文。
可选的,
所述发送模块是设置为为高优先级的路由网桥确定的延迟时长值小于为 低优先级路由网桥确定的延迟时长值。
可选的,
所述发送模块向所述邻居发送的 LSP报文中携带有本路由网桥设备产生 的链路状态信息。
可选的,
所述发现模块是设置为
通过接收所述新加入的邻居发来的 LSP ^艮文发现新加入的邻居。 与现有技术相比较, 本发明实施例防止了组播风暴的产生, 避免对设备 产生大的影响, 提高了设备和网络的稳定性和鲁棒性。 附图概述
图 1为本发明实施例中避免 ESADI协议报文风暴的方法流程图; 图 2为本发明实施例中的路由网桥的结构示意图;
图 3为本发明应用实例中 ESADI网络的拓朴结构示意图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
在本实施例中, 一种避免 ESADI协议报文风暴的方法, 如图 1所示, 包 括:
步骤 10、 ESADI网络中的 RBridge发现新加入本网络的邻居;即: RBridge 接收到新加入本网络的 RBridge设备发来的 LSP报文;
步骤 11、 上述 RBridge以单播的方式向该邻居发送 LSP报文; 较佳地, RBridge是在经过一延迟时长后发送该 LSP报文, 其中, 向邻居发送该 LSP 报文的延迟时长根据本路由网桥的优先级确定。 高优先级的 RBridge确定出 的延迟时长值小于低优先级的 Rbridge确定出的延迟时长值,且延迟时长值可 以为 0。
此外, 为了进一步减少网络中 LSP报文的数量, 上述 ESADI网络中的各 RBridge发送的 LSP报文中仅携带本地产生的链路状态信息, 而不包含从邻 居设备处接收到的链路状态信息。
上述 RBridge设备加入 ESADI网络可以通过该 RBridge设备使能 ESADI 功能来实现,也可以通过使能了 ESADI功能的 RBridge设备启动完成来实现。
上述方法釆用了单播的方式而不再以组播的方式发送 LSP "^文, 这样大 大减少了网络中 LSP报文的数目, 并且, 根据优先级值的大小来决定 LSP报 文的发送时间, 避免了多个 ESADI网桥同时发送 LSP报文的情况, 解决了 ESADI协议报文组播风暴的问题。
本实施例中, 一种避免端系统地址分发信息协议报文风暴的路由网桥, 如图 2所示, 包括:
发现模块 20 , 设置为发现新加入的邻居;
发送模块 21 , 以单播 1
( LSP )报文。
较佳地,发送模^
Figure imgf000007_0001
: i^ ^j v ;
延迟时长, 在经过所述延迟时长后以单播的方式向所述邻居发送 LSP "^艮文。
较佳地,
所述发送模块 21 为高优先级的路由网桥确定的延迟时长值小于为低优 先级路由网桥确定的延迟时长值。
较佳地,
所述发送模块 21向所述邻居发送的 LSP报文中携带有本路由网桥设备产 生的链路状态信息。
较佳地,
所述发现模块 20设置为通过接收所述新加入的邻居发来的 LSP报文来发 现新加入的邻居。
下面结合附图对避免 ESADI协议报文风暴的方法进行进一步说明。
如图 3所示, RB1、 RB2、 RB3为 ESADI路由网桥, 其中 RB2为 DRB (指定路由网桥) 。 RB1、 RB2和 RB3之间跨越由多个传输 RB (路由网桥) 组成的网络, ESADI协议报文在网络中以 TRILL数据的方式进行传输, 且只 在 RB 1、 RB2和 RB3中进行封装和解封装, 它们之间构成逻辑上的互联。
RB4为新加入当前 ESADI网络的 RBridge , 当该 RB4使能 ESADI功能, 或者具有 ESADI功能的 RB4启动后, RB4向网络中以组播的方式发送 LSP 0 segment (片段) , 在 LSP 0 segment中携带有 RB4的 ESADI参数, 如: 优先 级信息、 holding time (保持时间)等。 该 ESADI LSP报文的头部的目的 MAC 地址为组播地址 "All-RBridges multicast address" (所有路由网桥组播地址), 因此该 ESADI LSP报文会沿着分布式树的方向遍历该 ESADI 网络所在 VLAN-x的所有 ESADI RBridge , 即图中的 RB 1 ~RB3 ,
在现有的 TRILL标准和文档中, RB1~RB3也会以组播地址 "All-RBridges multicast address" 的 ESADI LAP报文回应 RB4。 这些组播报文发出后, 该 VLAN-x所在的 ESADI网络中的 RBridge都会收到该报文, 且上述 LSP报文 中携带了本 ESADI RBridge所附着的端系统的 MAC地址等信息。 在数据中 心网络中, 一般 RBridge所附着的端系统(即服务器)非常多, 所以 LSP报 文的数目会非常大, 有可能造成网络瞬间出现大量的 ESADI LSP报文, 进而 引起组播风暴。
使用本实施例提出的方法, RBI、 RB2及 RB3在收到了 RB4发来的 LSP 0 Segment报文后, 会分别根据自身优先级的值确定本设备响应 LSP报文的 时间。 由于 RB2为 DRB, 优先级最高, RB2最先以单播的方式发送 LSP报 文, 该报文包含 RB2所附着的所有端系统的 MAC地址等信息。 由于该 LSP 报文为单播地址发送, RB1和 RB3不会收到该 LSP报文, 只有新加入的 RB4 才会收到该 LSP报文。 RB1或者 RB3亦会在经过相应的延时后发送 LSP报 文, 这样就不会造成瞬间的组播报文风暴, 提高了设备和网络的稳定性。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上所述仅为本发明的优选实施例而已, 并非用于限定本发明的保护范 围。 根据本发明的发明内容, 还可有其他多种实施例, 在不背离本发明精神 改变和变形, 凡在本发明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。
工业实用性 本发明实施例防止了组播风暴的产生, 避免对设备产生大的影响, 提高 了设备和网络的稳定性和鲁棒性。

Claims

权 利 要 求 书
1、 一种避免端系统地址分发信息协议报文风暴的方法, 包括: 当路由网桥发现新加入的邻居后, 以单播的方式向所述邻居发送链路状 态协议数据单元(LSP )报文。
2、 如权利要求 1所述的方法, 其还包括:
W
其中, 当路由网桥发现新加入的邻居后是在经过所述延迟时长后发送所 述 LSP报文。
3、 如权利要求 2所述的方法, 其中:
高优先级的路由网桥确定出的延迟时长值小于低优先级的路由网桥确定 出的延迟时长值。
4、 如权利要求 1或 2或 3所述的方法, 其中:
所述路由网桥向所述邻居发送的 LSP报文中携带有本路由网桥产生的链 路状态信息。
5、 如权利要求 1所述的方法, 其中:
所述路由网桥发现新加入的邻居, 包括:
所述路由网桥收到所述新加入的邻居发来的 LSP报文。
6、 一种避免端系统地址分发信息协议报文风暴的路由网桥, 包括: 发现模块, 其设置为: 发现新加入的邻居; 以及
发送模块, 其设置为: 以单播的方式向所述邻居发送链路状态协议数据 单元(LSP )报文。
7、 如权利要求 6所述的路由网桥, 其中,
所述发送模块是设置为: 根据本路由网桥的优先级确定发送所述 LSP报 文的延迟时长, 在经过所述延迟时长后以单播的方式向所述邻居发送 LSP才艮 文。
8、 如权利要求 7所述的路由网桥, 其中: 所述发送模块是设置为: 为高优先级的路由网桥确定的延迟时长值小于 为低优先级路由网桥确定的延迟时长值。
9、 如权利要求 6或 7或 8所述的路由网桥, 其中:
所述发送模块向所述邻居发送的 LSP报文中携带有本路由网桥设备产生 的链路状态信息。
10、 如权利要求 7所述的路由网桥, 其中:
所述发现模块是设置通过接收所述新加入的邻居发来的 LSP报文来发现 新加入的邻居。
PCT/CN2012/077664 2011-07-01 2012-06-27 避免端系统地址分发信息协议报文风暴的方法及路由网桥 WO2013004140A1 (zh)

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