bgp routing protocol

This agreement creates five files: protoname. H, protoname. CC, protoname_pkt.h, proto_rtable.h, proto_rtable.ccStep 1: create a data packet header for the Protocol.1.1 declared in protoname_pkt.h.# Ifndef _ protoname_pkt_h __# DEFINE _ protoname_pkt_h __# Include # Define hdr_protoname_pkt (p) (hdr_protoname_pkt: Access (p ))Struct hdr_protoname_pkt {Nsaddr_t pkt_src _; // source node that generates data packetsU_int16_t pkt_len _; // data packet len

to this converged segment route.Notadvertise: Do not broadcast the summary information to this aggregation segment route.Cost: Sets the overhead for the aggregation route.Example: Virtual connection + route aggregation, topology in attachment650) this.width=650; "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/ Images/localimage.png ") no-repeat center;border:1px solid #ddd;" alt= "Spacer.gif"/>650 "this.width=650;" src= "http ://s3.51cto.com/wyfs02/m0

request messages every three seconds during boot time. Once a valid notification message is received, the request message is stopped. The host also listens for request messages from neighboring routers. These notification messages can change the host's default router. Also, if you do not receive a notification message from the current default router, the default router will time out. As long as there is a normal default router, the router will send a notification message every 10 minutes, the l

. Generally, there are two kinds of places, either directly to the destination or to the gateway. In Linux, rtable is a routing cache. Its rt_gateway field indicates the IP address to be resolved to a L2 address. After finding the route, it is initialized as the destination address of the data packet:Rth-> rt_gateway = fL. fl4_dst;In the subsequent process, if a gateway exists, it will be replaced with the IP address of the gateway, which all happens

different from the input on the left, as followsInter VLAN 1IP Add 192.168.1.2 255.255.255.0Exit4, the switch on the left to implement the operation of the host, the right to implement the operation of the backup machineInter VLAN 1Standby 1 IP 192.168.1.250//Set up virtual gatewaysStandby 1 priority 105//increase the default precedence by 5 points, default 100Standby 1 preempt//enable preemption functionInter VLAN 2Same operationInter VLAN 3,inter VLAN 4On the right side of the backup machine

VPN: Enhanced Interior Gateway Routing Protocol It was an enhanced version of the early IGRP that added a strong internal gateway routing protocol. It has made some extensions to IGRP, And the principle is similar. The difference is not very big. So we will introduce it here, we will not introduce IGRP any more, and we

With the proliferation of the Internet, security has always been a top priority. At present, although the emergence of IPv6 routing protocol can solve the security issues under the IPv4 network protocol version, it introduces the updated security issues. Then, let's take a look at the specific content through the following article. Introduce new security problems

Establish the connection relationship between link status Routing Protocol NetworkVroEstablish contact with your adjacent vro. This connection method is mainly implemented by passing the Hello message. The main functions of Hello messages: Establish an adjacent relationship Monitoring the handshake signal of the adjacent relationship Link Status routing

Understanding HSRP Overview HSRP (Hot Backup routing protocol): A proprietary technology of Cisco that ensures that the network edge device or access link fails, and that user communication recovers quickly and transparently, providing redundancy for the IP network. The Hot Backup routing protocol provides fault toler

We have analyzed and summarized the features of some RIP routing protocols. We found that some phenomena are not conducive to the formation and use of networks. Therefore, we propose two measures to improve the performance of the RIP routing protocol. 1. horizontal segmentation In the "count to infinity" Phenomenon of the RIP

(config) #router ripR1 (config-router) #network 13.13.13.0R1 (config-router) #network 192.168.1.0R1 (config-router) #passive-interface f0/0R2 (config) #router ripR1 (config-router) #network 23.23.23.0R1 (config-router) #network 192.168.1.0R2 (config-router) #passive-interface f0/0Now, you can try the traceroute command on your PCPc#traceroute 202.101.18.8Type escape sequence to abort.Tracing the route to 202.101.18.81 192.168.1.1 msec msec msec2 13.13.13.3 msec * msecpc#Close the s1/0 port of R

As a distance vector routing protocol, we do not want to see whether it is a routing loop or slow convergence. Of course, it also has some auxiliary measures to remedy, such as: 1. Split-horizon (horizontal split) 2. Split-horizon with lateral ONED reverse (horizontal split with toxicity reversal) 3. triggered Update (trigger update) 4. holddown timer5 and define

The flood (mflood) routing algorithm is a simple and effective routing algorithm. The basic idea is that each node is a data group received by broadcast forwarding. if it receives a duplicate group, it is discarded. The flood protocol will cause the Data Group to spread with the source node as the center. In order not to cause the spread of a large area to occupy

Preface:Actually, this articleArticleI don't know what the name should be. I don't feel like I'm talking about anything. Alas... In fact, my intention is to describe the IP layer of the Linux protocol stack to route data packets. For example, if there are two Nic devices, where should the data packets go?And so on... First, understand the concept of routing cache:Although the data structure of route table

Flooding improvement experiments have been ongoing recently. After two weeks, I finally made some progress. It may seem like a slight modification to Daniel, but it seems to me a success. I also summarized my experiences in my blog. First of all, I learned how to modify the mflood routing protocol and wrote it again. It feels quite smooth. So I want to make some minor changes and try to optimize the effect.

In the routing selection protocol, we can divide it into many detailed types for separate explanation. Now let's take a look at some typical problems. Including Flooding, link status database, and region. Now let's take a look at more specific content from the article. I. Flooding of Link Status) After the neighboring relationship is established, the router starts to send the LSA to each neighbor. At the sa

the SW1 switch and use the ping command to verify that HSRP is in effect (with some delay, the first few packets of the ping command may be lost)650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6C/50/wKiom1VFxijRhRXfAAFpRF1jl_M972.jpg "title=" 17.jpg "alt=" Wkiom1vfxijrhrxfaafprf1jl_m972.jpg "/>650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/6C/50/wKiom1VFxlyh0n9uAAGcDWpaTJA542.jpg "title=" 18.jpg "alt=" Wkiom1vfxlyh0n9uaagcdwpatja542.jpg "/>This article is from the "Frozen

are playing in this group. Of course, if the router does not receive any reply after sending the query packet several times, it considers that all the hosts of the multicast have left silently, and it will reclaim the network segment. Note: If the host does not exist in version 1, click "Leave Group messages" Appendix: 224.0.0.0 ~ 224.0.0.255 is the reserved multicast address (Permanent Group address). The address 224.0.0.0 is retained without allocation. Other addresses are used by the

How to Set Up r12002 routing protocol for Cisco router 3620 to demonstrate how to set up r12002 routing protocol for Cisco router 3620 this time, we need to build a complex network experimental environment, this environment is also the experimental environment used later to learn about other router experiments. It is u

"Topology and software used" The switch used in this paper is H3C Simulator, the download address is as follows: Http://forum.h3c.com/forum.php? Mod=viewthreadtid=109740highlight=h3c%e6%a8%a1%e6%8b%9f%e5%99%a8 interested friends can download on the forum Demand R1 respectively and R2,R3, such as the above figure directly connected, R2 and R3 routing is not up to, through the policy route control from the R1 sent messages, all TCP messages are sen