Method, device and routing equipment for learning maximum transmission unit
A technology of maximum transmission unit and learning method, which is applied in transmission systems, digital transmission systems, electrical components, etc., and can solve the problems of blocked transmission and low message forwarding efficiency.
Active Publication Date: 2011-02-16
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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Problems solved by technology
[0008] Embodiments of the present invention provide a maximum transmission unit (MTU) learning method, device, and routing device to solve the problem of being blocked and blocked due to the length exceeding the MTU of the outgoing interface of the routing device during the transmission of the IPv6 message in the existing 6PE technology. The problem of low packet forwarding efficiency caused by multiple fragments
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[0028] A method, device, and routing device for learning a maximum transmission unit (MTU) provided by embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0029] The MTU learning method provided by the embodiment of the present invention, such as image 3 shown, including the following steps:
[0030] S301. Receive the BGP routing information to the IPv6 network notified by the upstream BGP neighbor in the IPv6 packet transmission tunnel; the BGP routing information carries the first MTU of the route to the IPv6 network determined by the upstream BGP neighbor;
[0031] S302. Detect the second MTU of the next hop of the BGP route to the IPv6 network carried in the received BGP routing information;
[0032] S303. Compare the size of the first MTU and the detected second MTU, and save the smaller value of the two as the determined third MTU of the BGP route to the IPv6 network;
[0033] S304. Determine whether th...
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The invention discloses a method, a device and routing equipment for learning the maximum transmission unit. The method comprises the following steps of: receiving border gateway protocol (BGP) routing information reaching an IPv6 network and informed by an upstream BGP neighbor in an IPv6 message transmission tunnel, wherein the BGP routing information carries a first maximum transmission unit (MTU) reaching a route of the IPv6 network and determined by the upstream BGP neighbor; detecting a second MTU corresponding to the next hop of the BGP route carried by the BGP routing information; comparing the size of the first MTU and the second MTU, taking the small value as the determined third MTU reaching the BGP route of the IPv6 network, and saving the small value; and when a downstream BGP neighbor is present in the tunnel is determined, carrying the third MTU in the BGP routing information reaching the IPv6 network and informing the downstream BGP neighbor. The invention solves the problem of low message forwarding efficiency caused by transmission blockage and segmentation for multiple times of IPv6 messages in the transmission process.
Description
technical field [0001] The present invention relates to the technical field of computer network communication, in particular to a learning method, device and routing equipment of a maximum transmission unit (MTU). Background technique [0002] The existing Internet Protocol Version 6 (IPv6) network, as the next generation network, has not yet been fully popularized, and is still scattered in the Internet Protocol Version 4 (IPv4) network as an island network. In order to realize the interconnection and intercommunication of these IPv6 networks through the IPv4 network, tunnel technology is generally used, such as using the Internet Protocol Version 4-Multiprotocol Label Switching (IPv4-MPLS) network to provide IPv6 message transmission tunnels, thereby realizing the interconnection and intercommunication of IPv6 isolated island networks , The Internet Engineering Task Force (The Internet Engineering Task Force, IETF) has formulated a corresponding standard for this solution,...
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IPC IPC(8): H04L12/56H04L12/70
Inventor 姚辉吴梦非林东豪贾攀
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD