bgp basics

What is the next hop of a BGP third party? Compare the next hop of the route from which the router sends the route with the outgoing interface. If the route is in the same CIDR Block, the next hop of the route remains unchanged. Let's take a look at the following example: www.2cto.com R1, R2, and R3 routers. The interface IP addresses are 10.1.1.1/10.1.1.2 and 10.1.1.3 respectively. R1 and R2 run IBGP, R1 and R3 run EBGP, there is a loopback2 on R2 an

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Bgp-community: Indirect influence route routing!such as: 100 of the network left AS100, carry attributes away!Configuration of the AR1:BGP 100Peer 2.2.2.2 As-number 200Peer 2.2.2.2 Ebgp-max-hop 255Peer 2.2.2.2 Connect-interface LoopBack0Peer 3.3.3.3 As-number 200Peer 3.3.3.3 Ebgp-max-hop 255Peer 3.3.3.3 Connect-interface LoopBack0Group AS200 InternalIpv4-family UnicastUndo SynchronizationNetwork 100.1.1.0 2

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Experiment topology: R1 configuration: R2 configuration: R3 configuration: Verify: From the BGP general rule 1.1.1.0/24 's next hop should be R2 (123.1.1.2) but it has automatically changed to R1 123.1.1.1. This is the third party's next jump. This is a change in the control level. Route redirection is a change in the forwarding of the data plane, and the next hop does not change. (Refer to My route redirection experiment) This arti

Python programming basics-hardware basics of computer principles and python programming Basics I. registers: registers are some small storage areas used inside the CPU to store data, and are used to temporarily store data and calculation results involved in calculation. 1. register features: 1) registers are located inside the CPU. The number is very small. There

copy of data is sent. The host or router can use IGMP to tell other routers that they are interested and then join multicast groups. Dense mode protocols implement flood and pruning, while Sparse Mode uses RP (reverse path) to avoid unnecessary floodinNetwork basics lecture 18: Understanding iBGP Routing Protocol Network basics lecture 17: BGP routing protocol p

2015 Latest Android Basics Getting Started directory (temporary version)tags (space delimited): Android Basics Getting Started TutorialObjective: Well, last night was a stolen number, the blog has been published more than 10 yellow stickers ... Then the catalogue to management mistakenly deleted, and then sent againLater after the consultation, the reality was set up a secret insurance problem, we

^ Flags The beginning of an expression, and if this character is not used, there is no starting limit for default. For example: When using the permit ^254, the meaning is that the route that is connected to the local as is 254 is allowed. If you use

If you forget it, remember 1. Download the original data package of .bz2from http://archive.routeviews.org/and decompress Bzip2-D xxx.bz2 2. Download the zebra-dump-parser software to convert data into ASCII code. Http://www.linux.it /~

, such as BGP (Border Gateway Protocol) to exchange routing information. The second is that the summary route is good and is added to the static route of the new network in this router. Any data packet that uses this route to reach this router will be sent to the new network, but OSPF does not know its existence. To this end, although we "re-allocate" These routing information to OSPF. We do not want to import BGP