A method for virtual router to establish tunnel

Abstract

The invention discloses a method for a virtual router to establish channels. The method comprises the steps of configuring universal router packaging channel information to a redundancy protocol equipment of a virtual router, setting a timer for inspecting the status of a channel port, regularly checking a source address and a destination address of the channel, and further checking the source address information of the channel if the source address and the destination address of the channel are not zero and the destination address of the channel is provided with a router, setting the protocol status of the channel port to be Up if an administrative status of the channel is Up, otherwise setting the administrative status of the channel to be Down and setting the timer for inspecting the status of the channel port again. By adopting the interaction of a GRE module and a VRRP module, the method provides a redundancy backup gateway which is supported by the VRRP technology when a subnet equipment adopts a GRE channel as a static default gateway, and improves the reliability and continuity of the running service to an access equipment when the GRE channel is adopted by a network system to forward data.

Description

technical field [0001] The invention relates to a method in the field of network communication, in particular to a method for establishing a tunnel by using a virtual router address. Background technique [0002] GRE (Generic Routing Encapsulation) in the prior art, that is, general routing encapsulation, can encapsulate another layer of any protocol on top of any layer protocol. The configuration of the GRE tunnel is relatively simple and is well known in the prior art, and related commands are not described here. [0003] The interface status of the GRE tunnel is related to the source address and destination address of the tunnel configuration. The current process is to use an interface status check timer to check the GRE interface status periodically, according to the source address, destination address and protocol routing table configured in the GRE interface. checking. If the check is passed, set the interface status to UP, otherwise set it to DOWN. [0004] VRRP (V...

AI Technical Summary

Problems solved by technology

[0012] At this time, the tunnels on both the active device and the backup device should use the VRRP virtual address as the source, so the existing technology has the following shortcomings: In the current GRE tunnel interface implementation technology, because the GRE tunnel interface status check does not include the VRRP address and VRRP Therefore, both the active device and the backup device consider that the source address is not a local address, and will set the GRE tunnel interface status to DOWN, so when the route to establish the GRE tunnel fails, the subnet device will lose All contacts with the outside world

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