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A routing information processing method and device
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An information processing method and a routing technology, which are applied in the field of routing information processing methods and devices, can solve problems such as inability to forward packets to P1 and failure of packet forwarding, and achieve the effect of reducing message forwarding failures
Active Publication Date: 2021-02-23
NEW H3C TECH CO LTD
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[0005] When the link between R1 and P1 is disconnected, the aggregated route will still be advertised on R1, so that when R3 forwards the packet to P1 according to the aggregated route advertised by R1, it may still forward the packet to R1. The link of the link has been disconnected, causing R1 to fail to forward the packet to P1, resulting in packet forwarding failure
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example 1
[0114] figure 1 The network structure shown includes: three routing devices R1, R2, and R3, two areas Area0 and Area1, a total of n servers P1, P2, ... Pn, and R1, R2, and R3 are ABRs.
[0115] The IP addresses of R1, R2, and R3 are recorded as Router-ID: 1.1.1.1, 2.2.2.2, 3.3.3.3 respectively, and the IP addresses of P1, P2, ... Pn are: 10.1.1.1, 10.1.1.2 ... 10.1 .1.200;
[0116] R1, R2, and R3 establish a neighbor relationship in Area0;
[0117] R1 respectively establishes neighbor relationships with P1, P2...Pn in Area 1;
[0118] R2 establishes neighbor relationships with P1, P2...Pn in Area 1.
[0119] R1 performs route aggregation on Area1, and the aggregated address of the obtained aggregated route is: 10.1.0.0 / 16;
[0120] Route aggregation is performed on Area1 on R2, and the aggregated address of the obtained aggregated route is: 10.1.0.0 / 16;
[0121] R1 and R2 respectively generate an LSA containing 10.1.0.0 and send it to R3. The route from R3 to 10.1.0.0 / 16 ...
example 2
[0138] Figure 4 The network structure shown includes: seven routing devices R1-R7, three areas Area0-Area2, P1, P2, ... Pn, a total of n servers, and R1-R7 is an ABR.
[0139] R1 performs route aggregation on Area1, and the aggregated address of the obtained aggregated route is: 10.1.0.0 / 16;
[0140] Route aggregation is performed on Area1 on R2, and the aggregated address of the obtained aggregated route is: 10.1.0.0 / 16.
[0141] The routing information from the address of R3 to each destination address stored in the local routing table of R3 is shown in Table 4 below:
[0142] Table 4
[0143]
[0144]
[0145] The current situation is: R1 detects that the route between R1 and P1 is an unreachable route, and the route between R1 and P1 is a detailed route in the summary route advertised by R1.
[0146] R1 generates an extended LSA, which is recorded as the second LSA, and the second LSA carries: the address of P1: 10.1.1.1, and the aggregation address: 10.1.0.0; R1...
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Abstract
The embodiment of the present application provides a routing information processing method and device, which relate to the field of communication technology and are applied to routing equipment, where the routing equipment is an edge routing equipment in an area. The method includes: acquiring at least one first route in the area, the A route includes the first IP address of the host connected to the routing device; when it is determined that the first route is a route that cannot reach the routing device, and the first route is a detailed route in the aggregated route that the routing device has issued, the neighbor of the routing device The routing device sends a first notification message, where the first notification message carries the first IP address and the second IP address of the aggregated route, and the first IP address and the second IP address are used by the neighbor routing device to update the local routing table. Applying the solution provided by the embodiment of the present application to process information can reduce the failure of packet forwarding.
Description
technical field [0001] The present application relates to the technical field of communications, and in particular to a routing information processing method and device. Background technique [0002] After the AS (Autonomous System, Autonomous System) is divided into different areas, each area is connected by an ABR (Area Border Router, Area Border Router) based on OSPF (Open Shortest Path First, Open Shortest Path First), and the areas can be connected through Route aggregation reduces routing information, thereby reducing the size of the routing table and improving the computing speed of routing devices. Among them, the inter-area route aggregation means that the ABR aggregates the routing information with the same IP (Internet Protocol, a protocol for interconnection between networks) prefixes, and only publishes one route to other areas. [0003] Based on the above information, see figure 1 , the network structure shown in the figure includes: three routing devices R1,...
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