Route issuing method and provider edge device
An operator edge, routing technology, applied in the field of network communication, can solve problems such as inability to communicate
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example 1
[0071] Example 1, depending on the device identification (Route id) of the next-hop device of the N private network routes. Among them, the Route id of the next-hop device can be the identifier of the device in BGP. Each device in the MPLS L3VPN network has a unique Route id. Different devices have different Route ids. Each device establishes a route id with other devices through BGP. When the neighbor connects, it carries its own Route ID in the BGP OPEN message to inform the neighbor, and records the Route ID notified by the neighbor. When the PE receives N private network routes locally, for any route in the N private network routes, the code preset by the developer can be used to combine the route with the recorded Route id association, based on this, the above-mentioned determination of whether the N private network routes with the same address prefix are received from different devices or received from the same device can be obtained by comparing the Route id of the next...
example 2
[0073]Example 2, based on the TCP port of the advertised route. Those skilled in the art know that when a device sends a route, it usually sends it through a TCP port. Based on this, when the PE receives N private network routes locally, it determines to publish the route for any one of the N private network routes. The TCP port (the TCP port is generally carried in the route), based on this, the above judges whether the N private network routes with the same address prefix are received from different devices or received from the same device. By comparing and sending the N private network routes You can know whether the TCP ports of the routes are the same. If they are all different, it means that the N private network routes are all received from different devices. On the contrary, if they are the same, it means that the N private network routes are all received from the same device. .
example 3
[0074] Example 3, route-based next-hop address. When the PE receives N private network routes locally, it determines the next-hop address of the route for any one of the N private network routes (the next-hop address is generally carried in the route). Based on this, the above Determine whether the N private network routes with the same address prefix are received from different devices or from the same device by comparing whether the next hops of the N private network routes are the same. If they are all different, it means that the The N private network routes are all received from different devices, otherwise, if they are the same, it means that the N private network routes are all received from the same device.
[0075] So far, it is easy to determine whether the N private network routes with the same address prefix are received from different devices or from the same device through any one of the above-mentioned examples 1 to 3. As an extension of the embodiment of the p...
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