METHOD FOR UPDATING ROUTE IN NETWORK, NETWORK DEVICE, AND SYSTEM

  • US 20190356578A1
  • Filed: 08/02/2019
  • Published: 11/21/2019
  • Est. Priority Date: 02/04/2017
  • Status: Active Grant
First Claim
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1. A method for updating a route in a network, the network, the method comprising:

  • setting up, by a first network device of the network, a correspondence between an Internet Protocol (IP) network segment and a first IP address, wherein the first IP address is an IP address of the first network device, wherein the network further comprises a second network device and a third network device, the third network device being connected to the first network device and the second network device;

    sending, by the first network device, a first LSA packet to the third network device, wherein the first LSA packet comprises a second IP address, wherein the first LSA packet is used to trigger the third network device to generate a first route whose destination address is the second IP address, wherein the second IP address belongs to the IP network segment, and wherein a next-hop IP address of the first route is the first IP address; and

    sending, by the first network device, a second LSA packet to the third network device in response to the first network device determining that switching is to be performed on a next hop of a route stored in the third network device, whose destination IP address belongs to the IP network segment, and whose next-hop IP address is the first IP address, wherein the second LSA packet comprises the first IP address and is used to trigger the third network device to update, from the first IP address to a third IP address, wherein the next-hop IP address of the first route, and wherein the third IP address is an IP address of the second network device.

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