Method and line card for synchronizing route forwarding table items
A technology for forwarding entries and routing, applied in digital transmission systems, data exchange networks, electrical components, etc., and can solve problems such as multi-processing resources and consumption
Active Publication Date: 2014-03-12
RUIJIE NETWORKS CO LTD
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Problems solved by technology
[0008] Embodiments of the present invention provide a method for synchronizing routing and forwarding entries and a line card to solve the problem of realizing (S, G) entries on the main control card and (S, G) entries on the line card provided by the prior art. The table entry synchronization scheme consumes more processing resources
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Embodiment Construction
[0024] In order to solve the problem of consuming more processing resources in the scheme of synchronizing the (S, G) entry on the main control card with the (S, G) entry on the line card provided by the prior art, the embodiment of the present invention Provides a novel synchronization scheme for routing and forwarding table entries, through which the line card can regenerate (S, G) table entry, and the line card updates the information in the stored route forwarding table entry, and stores the updated information and the determined route convergence sequence code correspondingly, so as to receive the information sent by the standby master control card for After notifying the update of the multicast routing convergence end message of the routing and forwarding table entries, the line card determines and deletes the information that is not stored corresponding to the routing Synchronization on cards and line cards.
[0025] The synchronization scheme of routing and forwarding...
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The invention discloses a method and line card for synchronizing route forwarding table items for solves the problem in the prior art that the synchronization of a table item (S,G) on a main control card and a table item (S,G) on a line card consumes more processing resources. The method comprises the following steps of: after switching an active main control card to a standby main control card, determining route convergent sequence codes by the line card; copying a received message by the line card and sending the copy to the standby main control card; receiving route forwarding table item information which is generated and fed back by the standby main control card according to the message; updating information of a route forwarding table item which is stored in the line card according to the information, and storing the updated information and the determined route convergent sequence codes in the route forwarding table item which is stored in the line card; and determining and deleting stored information which does not correspond to the route convergent sequence codes in the route forwarding table item by the line card after receiving notification information that multicast route convergence is finished.
Description
technical field [0001] The invention relates to the technical field of message multicasting, in particular to a method for synchronizing routing and forwarding entries and a line card. Background technique [0002] Non-stop forwarding (nsf, no stop forwarding) refers to a technology that ensures that the forwarding of data packets will not be interrupted when one or more nodes among the multiple nodes that send and receive data included in the data device fail. Generally, nsf includes nsf of unicast traffic, nsf of multicast traffic, nsf of mpls traffic, etc. [0003] The following will focus on nsf for multicast traffic. Before introducing the nsf of multicast traffic, it is necessary to introduce some basic knowledge of multicast transmission as follows: [0004] Protocols in multicast transmission are divided into group membership protocols between hosts and routers and multicast routing protocols between routers and routers. Among them, the group membership protocol i...
Claims
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IPC IPC(8): H04L12/70H04L45/74
Inventor 李凯
Owner RUIJIE NETWORKS CO LTD