bgp neighborship

650) this. width = 650; "src =" http://img1.51cto.com/attachment/201309/113109283.png "title =" Unnamed image .png "/> 1. Network Environment Description 1.1 Region ① The accessibility of routes in the region is provided by its IGP ② The Regional Border Router simultaneously runs the IGP and BGP processes in the region ③ When there are multiple regional border routers in the region, if there is a direct connection link between these routers, a fully i

Relationships650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/70/C1/wKioL1W9o1-CjQC8AAIBwb-iTG8477.jpg "title=" Figure 3.png "alt=" Wkiol1w9o1-cjqc8aaibwb-itg8477.jpg "/>To configure redistribution:Configure the import and export of Route-target in the VRF, if it is multiple VRF, be sure to note the entry.IP VRF EIGRP100Rd 100:100Route-target Export 100:100Route-target Import 200:200!IP VRF EIGRP200Rd 200:200Route-target Export 200:200Route-target Import 100:100Configure

relatively complicated. To determine the optimal route, the routing algorithm must start and maintain the route table containing route information. The routing information varies depending on the routing algorithm used. The routing algorithm fills in different information collected in the routing table, and tells the router about the relationship between the destination network and the next stop (nexthop) according to the route table. The router interconnection information is updated, and the r

exploration Institute are divided into 1 as, as the core as; 12 subordinate regions are divided into 12, the region network as does not transfer domains from other as, and is only connected to the core. ● Border Gateway Protocol BGP and its planning Border Gateway Protocol (BGP) is a protocol designed specifically for TCP/IP Internet to transmit route accessibility information between multiple Autonomous

, especially for earlier network maintenance personnel who are quite familiar with OSPF protocol; L in terms of scalability: the is-is router is strictly structured and runs stably. It can only belong to one region and does not provide direct support for nbma and p2mp interfaces. ISIS has better scalability: Isis can support multiple network layer protocols (OSPF only supports IP protocols); Isis can smoothly translate, split, and merge, without interrupting traffic; Isis is based on TLV, the Pr

2.10What is the main difference between 1.bgp-4 and earlier versions?2. What are the two issues that CIDR solves?3. What is the difference between a category and an classless IP router?4. What is the difference between a category and an classless IP routing protocol?5. Please explain how the rollup hides the instability of the network.6. Explain how the rollup produces an asymmetric traffic model.7. Asymmetric flow is not expected?8. What is NAP?9. Wh

The commands involved in this document are: Neighbor [Ip-address|peer-group-name] advertise-map [route-map-name1] non-exist-map [route-map-name2] Neighbor [Ip-address|peer-group-name] Default-originate Neighbor [ip-address|peer-group-name] default-originate route-map xxx 3-6-1 neighbor [Ip-address|peer-group-name] advertise-map [route-map-name1] non-exist-map [route-map-name2] This command is, in fact, the conditional route we often say. If the mandatory translation into Chinese, such as t

When the export router is upgraded, the troubleshooting steps for the export traffic anomaly caused by routing turbulence are as follows:Network environmentAn operator of the export router ne40e version upgrade, after the upgrade, the route learning normal, but from the network management shows that the flow of exports is much lower than the usual period of traffic, and traffic growth is slow, after a long time to reach peacetime flow.Fault analysisAs a result of the NE40E upgrade process to hav

4.4.2.4 255.255.255.0 ! Interface Loopback3 Ip address 4.4.3.4 255.255.255.0 ! Interface Serial1/0 Ip address 10.0.3.2 255.255.255.0 Serial restart-delay 0 ! Router ospf 1 Log-adjacency-changes Network 4.4.1.0 0.0.0.255 area 2 Network 4.4.2.0 0.0.0.255 area 2 Network 4.4.3.0 0.0.0.255 area 2 Network 10.0.3.0 0.0.0.255 area 2 ! At the end of the preceding command, configure the OSPF route tables for each vro as follows: R1 # show ip route Codes: C-connected, S-static, R-RIP, M-mobile, B-

for routing selection between multiple autonomous regions, common are BGP and BGP-4. The following is a brief introduction. RIP route protocol The RIP Protocol was originally designed for the Xerox parc common protocol of the Xerox network system and is a common Routing Protocol in the Internet. RIP uses the distance vector algorithm, that is, the router selects routes based on distance, which is also cal

)Rfc1671 White Paper on transition to IPng and other considerationsRfc1690 introduction to Internet Engineering and Planning Group (iepg)Rfc1691 document architecture of Cornell University Digital LibraryRfc1696 modem MIB defined by smiv2Rfc1713 DNS debugging toolRfc1715 Address allocation efficiency ratio HRfc1723 route information protocol (version 2)Rfc1724 rip version 2 Management System Library (MIB) ExtensionRfc1738 uniform resource locator (URL)Rfc1752 recommends next-generation IP protoc

G0/0/0/1Rp/0/0/cpu0:test (config-if) #shutRp/0/0/cpu0:test (config-if) #commit confirmed automatically rolls back to the previous state after---30s, i.e. the interface automatically turns onSH Run int G0/0/0/1Interface GIGABITETHERNET0/0/0/1IPv4 address 13.1.1.1 255.255.255.0ShutdownRp/0/0/cpu0:nov 09:43:19.754:ifmgr[225]:%pkt_infra-link-3-updown:interface GIGABITETHERNET0/0/0/1, changed state To up//readers can see that the interface is automatically opened after 30s, which can greatly improve

default value is changed; the default IS-IS metric value IS 0, but it can enter the routing table. The default OSPF metric IS two types of LSA value 20, and the routing from bgp is 1; BGP sets MED to the measurement value of IGP. Www.2cto.com 4, when different protocols and different paths exist, use the Management Distance and measurement value for selection: -- add the route with the minimum management d

protocol used in the autonomous region is called the internal gateway protocol, which is commonly used with RIP and OSPF. The external gateway protocol is mainly used for routing selection between multiple autonomous regions, common are BGP and BGP-4. The following is a brief introduction. RIP route protocol The RIP Protocol was originally designed for the Xerox parc common protocol of the Xerox network sy

external gateway protocol EGP based on whether they are used in an autonomous domain ). The Autonomous Region refers to a network with a unified management organization and a unified routing policy. The routing protocol used in the autonomous region is called the internal gateway protocol, which is commonly used with RIP and OSPF. The external gateway protocol is mainly used for routing selection between multiple autonomous regions, common are BGP an

network topologies. Of course, various dynamic routing protocols occupy network bandwidth and CPU resources to varying degrees.Static Routing and dynamic routing have their own characteristics and applicability. Therefore, dynamic routing is usually used as a supplement to Static Routing in the network. When a group is used to find the route in the vro, The vro first searches for the static route. If yes, the vro。 forwards the route according to the corresponding static route forwarding group.

IP address of the end user. This IP packet is removed from the packet when it reaches the target service provider. LISP can be shared with the Border Gateway Protocol (BGP), which is the main communication channel between the edge and the core router. Cisco researcher Dino Farinacci believes that the problem we face is that IP addresses are allocated to hosts and they are not allocated in topology mode. This means that the core router of the ISP netw

The importance of vro configuration is self-evident. Here we mainly analyze the Cisco router configuration statements in detail, and share them with you here, hoping to help you. Introduction to Cisco router configuration Cisco ios operating environment. ROM monitor> Failure of password recovery BootROM router (boot)> Flash image upgrade Cisco IOS router> Normal operation Command Modes Command mode. User EXEC Router> user access Privileged EXEC Router # System adminstration

(1) features of Route Maps: Route Maps is similar to access lists. The difference is that Route Maps can change some attributes of Packets/Routes. Purpose: Route Maps is mainly used for Redistribution, Policy Routing, and BGP implementation. Implementation: Policy Routing sends Packets to Route Maps to implement Policy Route forwarding. Redistribution sends Routes to Route Maps to filter Route entries. Configuration instructions: If the Action and Seq

protocol is at the core and which is at the boundary. 4) determines the route redistribution direction. You can use the following command to reallocate route updates. This example is for OSPF ): Router (config-router) # redistribute protocol [process-id] [metric-value] [metric-type-value] [subnets] In this command: ◎ Protocol: Specifies the source route protocol for Route redistribution on the vro. The main values are bgp, eqp, igrp, isis, ospf, stat