Route publishing method and device

Abstract

This application provides a route publishing method and device. Wherein, the method includes: the local 6PE device notifies the peer 6PE device of the 6PE label corresponding to the local 6PE device during the process of establishing a BGP neighbor relationship with the peer 6PE device, and receives and records the pair The 6PE label corresponding to the end 6PE device; after the local 6PE device establishes a BGP neighbor relationship with the peer 6PE device, it advertises the private network route from the CE in the local IPv6 user network to the peer 6PE device; the local 6PE device receives the peer 6PE device The private network route announced by the end 6PE device, and the received private network route and the recorded 6PE label corresponding to the peer 6PE device are correspondingly recorded in the local routing table. By adopting the present invention, it is avoided to assign a private network label to the private network route from the CE during the route publishing process, saving label resources and bandwidth resources.

Description

technical field [0001] The present application relates to network communication technology, in particular to a method and device for publishing routes. Background technique [0002] IPv6 Provider Edge (6PE: IPv6ProviderEdge) is a transitional technology that uses Multiprotocol Label Switching (MPLS: MultiprotocolLabelSwitching) technology to implement isolated IPv6 user networks through IPv4 backbone network connections. see figure 1 , figure 1 It is a schematic diagram of the existing 6PE network. exist figure 1 in, the figure 1 The three devices in the middle are 6PE equipment 1, 6PE equipment 2 and backbone network service provider (P: Provider) equipment to form an IPv4 backbone network, and the two sides are IPv6 user networks, namely IPv6 user network 1 and IPv6 user network 2, through the edge The 6PE device 1 and the 6PE device 2 realize the network connection between the IPv6 user network 1 and the IPv6 user network 2 across IPv4. [0003] exist figure 1 Amon...

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Problems solved by technology

[0008] It can be seen from the above that in the process of packet forwarding, whether the 6PE device forwards IPv6 packets or receives IPv6 packets, it does not care about the specific value of the private network label assigned to the route. , the 6PE device also assigns different private network labels to the routes from different CEs and notifies them to the peer end, which is obviously unnecessary for subsequent packet forwarding, resulting in a waste of label resources. The label occupies 4 bytes, which will also cause a waste of bandwidth resources due to the advertisement of the private network label during the route publishing process

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