A label distribution method and device

Abstract

The present invention discloses a label allocation method and equipment. The method comprises: a user-side network device sends a label block request message to a backbone-side network device; the user-side network device receives a label block response message returned by the backbone-side network device The label block response message carries the available label range selected by the backbone network device; the user network device uses the available label range selected by the backbone network device to determine the label used by the user network device; The user-side network device sends a label confirmation message to the backbone-side network device, where the label confirmation message carries the label used by the user-side network device. In the embodiment of the present invention, it is possible to ensure that each backbone-side network device assigns the same label to the user-side network device, thereby meeting the demand for fast switching, reducing switching time, giving users a better service experience, and improving the service quality of the operator network .

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a label allocation method and equipment. Background technique [0002] In order to improve service reliability, the link between the user-side network device and the backbone-side network device usually constitutes an active and standby link, such as: VPN FRR (Fast ReRoute , Fast Rerouting) networking, PW (Pseudo Wire) networking in L2VPN, LDP (Label Distribution Protocol, Label Distribution Protocol) FRR networking in L2VPN, etc., there will be active and standby links in these networks. Such as figure 1 As shown, it is a schematic diagram of PW networking in L2VPN. The user-side network device is UPE (User Provider Edge, user service provider network edge) device, and the backbone-side network device is NPE (Network Provider Edge, network service provider network edge) Devices, PW1 between the UPE device and NPE device 1, and PW2 between the UPE device and NPE ...

AI Technical Summary

Problems solved by technology

However, during the switching process, the UPE device also needs to update the corresponding relationship between the label recorded in the forwarding table entry and the PW, and the time for updating the forwarding table entry is usually relatively long, resulting in the failure to meet the needs of fast switching

Similarly, when the standby PW fails, the UPE device needs to switch the packets transmitted on the standby PW to the active PW. During the switchover process, the UPE device also needs to update the corresponding relationship between the label recorded in the forwarding table and the PW. , and the time to update the forwarding entry is usually relatively long, resulting in the inability to meet the needs of fast switching

Images