A method and device for saving frr protection resources
A technology for protecting resources and tunnel protection groups, applied in the field of saving FRR protection resources, can solve problems such as waste of resources, waste of FRR protection resources, waste of network resources, etc., and achieve the effect of avoiding waste of resources
Active Publication Date: 2016-09-07
XINHUASAN INFORMATION TECH CO LTD
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Problems solved by technology
[0006] At present, when establishing FRR protection on an MPLS TE tunnel, it is necessary to establish FRR for each CRLSP in the MPLS TE tunnel at the same time, that is, it is necessary to reserve multiple FRR protection resources for each CRLSP in the network, while the MPLS TE tunnel works at 1: 1 In the forwarding mode, since the traffic will only be transmitted in one CRLSP at the same time, the FRR on the CRLSP without traffic transmission will not work, which will inevitably cause a waste of network resources
For example, when FRR needs to be established for MPLS TE, assuming that MPLS TE includes two links, the primary CRLSP and the backup CRLSP, then two copies of FRR protection resources need to be reserved at the same time. If the FRR protection resource is 100M, this requires 200M resources , but in fact, when MPLS TE works in 1:1 mode, the FRR protection resources reserved on one of the CRLSPs will not play any role, because when one CRLSP transmits traffic, the other CRLSP will not Traffic transmission, which causes a waste of 100M FRR protection resources
Likewise, see figure 2 , in the MPLS TE tunnel protection group that establishes multiple MPLS TE tunnels for the same type of traffic, similar problems also exist. Working in 1:1 mode, establishing FRR for two backup tunnels at the same time will also cause waste of resources
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[0041] In the MPLS TE tunnel technology, in the networking environment of a single MPLS TE tunnel with multiple CRLSPs or an MPLS TE tunnel protection group with multiple MPLS TE tunnels, a backup CRLSP link will be established for a single MPLS TE tunnel or an MPLS TE tunnel Create a backup tunnel to form a tunnel protection group to protect traffic, so that traffic can be forwarded on the active and standby CRLSP links or in the active and standby tunnels. When the active CRLSP link or the main tunnel fails, the data traffic can be immediately forwarded. Switch to the backup CRLSP link or backup tunnel for forwarding to ensure uninterrupted data traffic. In addition, for some key nodes, such as the nodes where the active and standby CRLSP links pass through at the same time, FRR technology can be used for independent protection. However, the problem with FRR protection is that the protection object may be based on the MPLS TE tunnel or the protection group of the MPLS TE tun...
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The invention provides a method and device for saving FRR protection resources. The method includes: the head node determines whether the current CRLSP or MPLS TE tunnel needs FRR protection; when the head node determines that the current CRLSP or MPLS TE tunnel needs FRR protection, sending a message carrying a preset mark in the current CRLSP or MPLS TE tunnel , to notify the local repair node PLR on the CRLSP or MPLS TE tunnel to establish FRR. The technical scheme of the invention only establishes FRR protection for the CRLSP or MPLS TE tunnels that need FRR protection, which can effectively save network resources.
Description
technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for saving FRR protection resources. Background technique [0002] MPLS (Multi-Protocol Label Switching, multi-protocol label switching) TE (Traffic Engineering, traffic engineering) combines MPLS technology and traffic engineering, and reserves resources by establishing LSP (Label Switched Path, label switching path) tunnels along the specified path , so that network traffic bypasses congested nodes to achieve the purpose of balancing network traffic. Among them, the MPLS TE tunnel is a virtual point-to-point connection from the head node to the destination node. Usually, an MPLS TE tunnel is composed of a CRLSP (Constraint-based Routed Label Switched Paths, LSP based on constraint routing). In practical applications, in order to improve the reliability of MPLS TE tunnel data transmission, sometimes it is necessary to Multiple CRLSPs or two tu...
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IPC IPC(8): H04L12/703H04L12/723H04L45/28H04L45/50
CPCY02D30/50
Inventor 吴文国
Owner XINHUASAN INFORMATION TECH CO LTD