Retransmitting method of supporting policy routing and device thereof

A forwarding method and routing technology, applied in the communication field, can solve problems such as inconsistent route selection and complex ACL matching relationship, and achieve the effects of simplifying the matching process, improving business processing performance, and simplifying user configuration

Inactive Publication Date: 2009-09-23
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, due to the complex matching relationship of the ACL, there may be differences between the implementation on the interface board and the implementation on the service board, which will also cause some inconsistencies in route selection.

Method used

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  • Retransmitting method of supporting policy routing and device thereof
  • Retransmitting method of supporting policy routing and device thereof
  • Retransmitting method of supporting policy routing and device thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0052] figure 2 It is a flowchart of a forwarding method supporting policy routing in Embodiment 1 of the present invention. like figure 2 As shown, the process includes the following steps:

[0053] Step 201: When configuring the policy routing, assign a next hop code, that is, a next hop ID, to the next hop information of the policy routing.

[0054] Since the outgoing VLAN has only less than 2 bytes, it is not enough to accommodate the next hop information, so this embodiment assigns an ID for the next hop information, and uses a shorter ID to represent longer information content, so that the next hop information can be accommodated in the outgoing VLAN. within the limited space of the VLAN field.

[0055] Step 202: Synchronize the corresponding relationship between the next hop information and the next hop ID to the relevant interface board and NAT service board.

[0056] Specifically, this step is: deliver the corresponding relationship of the next hop information o...

Embodiment 2

[0071] In the first embodiment above, the service board needs to store the corresponding relationship. Since the complete next-hop information is relatively long, the storage burden of the service board is increased. Preferably, in order to reduce the storage burden of the service board, it is not possible to directly configure the correspondence between the next hop information and the next hop ID, but to configure the correspondence between the next hop IP corresponding to the next hop information and the next hop ID relationship, and synchronize the corresponding relationship between IP and ID to the service board, so that the service board only needs to save the IP address and does not need to save the long next-hop information. IP searches the forwarding table, and the next hop information can be obtained, so as to realize forwarding.

[0072] image 3 It is a flowchart of a forwarding method supporting policy routing in Embodiment 2 of the present invention. like ima...

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Abstract

The invention discloses a retransmitting method of supporting policy routing and a device thereof. The method comprises the following steps: a next hop ID is distributed to the next information of the policy routing, the corresponding relationship between the next information and the next hop ID is synchronized on an interface plate and a business plate; the interface plate carries out the policy routing on a retransmitting message so as to obtain next hop information; the next ID which is corresponding to the next information is transmitted to the business plate, wherein, the next ID is carried in the message; the business plate resumes the next information which is corresponding to the next hop ID according to the corresponding relationship so as to retransmit according to the resumed next information. The invention can support policy routing descend hierarchy business without configuring and reexecuting the policy routing function on the business plate.

Description

technical field [0001] The invention relates to routing technology in the communication field, in particular to a forwarding method and device supporting policy routing. Background technique [0002] Policy routing technology is a technology for selecting routes based on policies. Usually route selection is carried out through the destination IP, and policy routing can be configured to select routes based on other characteristics of the data packet, such as selecting routes according to the source IP, so as to realize route selection more flexibly. [0003] Generally, data packet forwarding of a high-end network routing device is implemented by NP (Network Processor, network processor) and ASIC (Application Specific Integrated Circuit) hardware. NP can be programmed, and its implementation is more flexible, but its performance is generally lower than that of ASIC chips, and its cost is much higher than that of ASIC chips. But ASICs are not programmable, so their functional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L45/17
Inventor 卢胜文
Owner NEW H3C TECH CO LTD
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