bgp route selection

1. If the next hop cannot be reached, do not consider2. Select a route with the maximum weight.3. If the route has the same weight, use the route with the highest local priority.4. If you have the same local priority, the BGP Route from the vrobgp is preferred.5. If there is

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 t

Route table and Route Selection Algorithm standard route table www.2cto.com 1. The next route entry's basic idea route table only specifies the next step from the router to the destination path, without knowing the complete path t

process. When routing selection processes do not share information about the network system, it is called night routing (ships in night, SIN )｡ 3. Default seed measurement values. The default seed measurement values of RIP, IGRP, and VPN are all infinite. They do not enter the route selection table unless the default value is changed; the default IS-IS metric va

through the process. When routing selection processes do not share information about the network system, it is called night routing (ships in night, SIN )｡ 3. Default seed measurement values. The default seed measurement values of RIP, IGRP, and VPN are all infinite. They do not enter the route selection table unless the default value is changed; the default IS-

learned through the process. When routing selection processes do not share information about the network system, it is called night routing (ships in night, SIN )｡ 3. Default seed measurement values. The default seed measurement values of RIP, IGRP, and VPN are all infinite. They do not enter the route selection table unless the default value is changed; the def

Routing can be divided into internal gateway protocol (IGP) and external Gateway Protocol (BGP) based on whether it is used in an autonomous system. Common internal gateway protocols include RIP and OSPF, the external gateway protocol has BGP, BGP-4, here mainly talk about the Internal Gateway Routing protocol: RIP (Routing Information protocol) is a distance ve

1. Support for summary Protocol name Automatic summary on classification network boundaries? Can I disable automatic summary? Does it support aggregation outside the classification network boundary? Y N N R00002 Y Y N IGRP Y N N China site Y Y Y OSPF N N Y IS-IS N N Y 2. Comparison of management examples Route So

creation. Set other rt_msghdr members. 3. Set the Message Protocol and call raw_input. 8. rt_ifmsg Function Rt_ifmsg is called in both if_up and if_down. When an interface is connected or disconnected, this function is used to generate an optional plug-in message. Approximate process of functions As follows: 1. Call the rt_msg1 function to create a message in the mbuf chain. 2. Complete Message creation. Set other members in the if_msghdr interface. 3. Set the Message Protocol and call raw_inpu

division reduces the size of the route table (in section 1 0. 8, we will introduce a new technology, that is, using class C addresses can also reduce the size of the route table ).The subnet is not transparent to the vrouters In the subnet. As shown in 3-6, a data packet from I n t e r n e t arrives at G a t e w a Y, and its destination address is 1 4 0. 2 5 2. 5 7. 1. Vro g a t e w a y needs to know that

Standard route table 1. The basic idea of road selection at the next stop The route table only specifies the next step from the router to the destination path, without knowing the complete path to the destination. 2. The standard IP route table contains many (N, R) pairs. N: IP address of the destination network R: IP

. Correctness: P276, theorem 7.53, the preceding structure of Figure G ' has a viable flow, when and only if there is a workable way to design this survey. 2) Route scheduling Problem Description: A bunch of routes four yuan (Startid, StartTime, Endid, EndTime); An aircraft can fly except for a normal flight I, Flight J that meets one of the following conditions: 1) The end point of I and the beginning of J, and I and J have enough time to maintain

Route configuration command-ip route command Router (config) # ip route Route configuration command -- ip default-network command Router (config) # ip default-network Router (config) # ip route 0.0.0.0 0.0.0.0 Routing Protocol-internal routing

The purpose of this article is to help readers understand routing choices and to help readers. Traffic packets from a starting point through the router to reach the destination often have more than one route to choose, there are static routes, there are dynamic routing protocol, a variety of routes, so how the router from a number of routes to choose the best route? How did it do that? This is because the r

Details of TCP/IP 2: Implementation-route selection, A process uses a plug-in the routing domain to send and receive routing packets. A PF_ROUTE And a SOCK_RAW plug-in type. This process can send the following five optional packets to the kernel: 1. RTM_ADD: Add a new route. 2. RTM_DELETE: delete an existing route. 3.

Tags: blog http OS AR, 2014 on log ad A process uses a plug-in the routing domain to send and receive routing packets. A pf_route And a sock_raw plug-in type. This process can send the following five optional packets to the kernel: 1. rtm_add: Add a new route. 2. rtm_delete: delete an existing route. 3. rtm_get: obtains all information about a route. 4. rtm_chang

Tingkman-tcp-IP Protocol Analysis and Implementation 5-route addition, search, and selection Part of the content of this article may come from the network, the content belongs to the original author, If you infringe your rights and interests, please inform me in time, I will delete immediately, the original content copyleft belongs to the tingkman@163.com, with GPL, You can freely copy and reprint the conte

Label: style blog HTTP color Io use AR strong data IP Route Selection IP protocol provides an unreliable and connectionless data transmission service: 1. unreliable: IP datagram cannot be ensured to reach the destination; if an error occurs, for example, if the buffer of the vro is full, the datagram is directly discarded and an ICMP message is sent to the source. 2. connectionless: the processing of each d

[Cpp]# Include # Include /*Simulate route table Selection: pre-set the route table. When a packet arrives,View the destination address, and use this address to match the subnet mask of each item in the route table. If the obtained address is the same as the destination address,Forward the data packet from the port with

Details of TCP/IP 2: Implementation-Route Selection A process uses a plug-in the routing domain to send and receive routing packets. A PF_ROUTE And a SOCK_RAW plug-in type. This process can send the following five optional packets to the kernel: 1. RTM_ADD: Add a new route. 2. RTM_DELETE: delete an existing route. 3. R