bgp attributes

[Experimental environment] liehuo.net C3640-IK9O3S-M Version 12.4 (10) liehuo.net [Tutorial Objective] veryhuo.com Uses Full-mesh to resolve BGP routing black hole liehuo.net [Experiment topology] liehuo.net Liehuo.net [Experiment description] lie # fire # Network BGP distribution. R2, R3, and R4 run the OSPF protocol. The objective is to enable 1.1.1.1 BGP neig

Modify Weightrouter BGP 1 nrighbor [Address] weight 10 Modify single access-list 6 Permit 6.6.6.6N Bsp router-map XXX Permit 10 match IP address 6 N Bsp Set weight 20 router-map xxx permit 20router bap 1 neihgbor [address] Router-map xxx In2.local_preference:as Valid within, as within the pass, the default value is 100, compared to other as modified Local_preferenceroute-map XXX Permit 10 set local-preference 110router

BGP routing load balancing fault caseNetwork Architecture 1. Topology: the actual network structure is simplified considering the privacy of the company's network and a clearer description of fault phenomena. 2. network planning and data Configuration Overview: ◆ ASR9K establishes IBGP neighbor relationships with two n7ks Based on the interconnected addresses respectively; ◆ ASR9K is connected to the Cisco 752 architecture and 752 is used as the CDN s

With the development of the Internet in China, the connection between ISP service providers and Internet is also changing. On a network connection, from a single connection to the Internet via multiple telecommunications companies, in terms of routing protocols used, from the use of static routing protocols to the use of BGP (Border Gateway Protocol). How does the ISP deploy the BGP routing protocol rationa

1. Is the BGP Route table mentioned in the BGP protocol a BGP table? Which table does BGP actually use to route data packets? Is it a BGP table or an IP Route table? Are there any relationships between the two tables? For example, are some entries in the

Optional delivery-BGP Communities is a marker for routing entries to ensure continuity of routing filtering and selection-BGP routers can community the routing entries when redistribution, sending, and receiving routing updates (ROUTE-MAP)-Depending on the community value, the BGP router can filter incoming or outgoing routing updates or optimize certain routes-B

Technorati Tags: mpls,bgp,ccie, tags, LDPWill LDP assign tags to BGP routes? Why?650) this.width=650; "Style=" background-image:none;border-bottom:0px;border-left:0px;padding-left:0px; padding-right:0px;border-top:0px;border-right:0px;padding-top:0px; "title=" clip_image002 "border=" 0 "alt=" clip_ image002 "src=" http://s3.51cto.com/wyfs02/M02/73/F4/wKiom1YKXeDji6JDAADrM1sEj0Q970.jpg "height=" 178 "/>Befor

BGP Communities PropertiesThe community property of BGP is an optional transitive property, and routers that do not support this attribute pass the community value to the downstream BGP neighbor intact (provided that the delivery is configured Community property). the community attribute of BGP simplifies the matching

Basic Configuration: R1: Router bgp 9806 Nei too many connections 20 remote-as 4808 Bgp router-id 1.1.1.1 R2: Router bgp 4808 Nei 1.1.1.1 remote-as 9806 Nei 1.1.1.1 update-source lo0 Bgp router-id 255.255.255.255.20 Network bandwidth limit 21 mask limit 255 Only the bgp neig

BGP of the Community is a route-tagging method that ensures the continuity of route filtering and selection, and is transitive. Experimental topology:650) this.width=650; "style=" width:750px;height:320px; "title=" 1.png "alt=" Wkiom1r6iu3asudqaadaniujdek733.jpg "src= "Http://s3.51cto.com/wyfs02/M00/54/29/wKiom1R6iU3ASudQAADAniUjDek733.jpg" width= "615" height= "396"/>Lab Requirements:1. Set the 11.0/24 community Property value 100:11 on R1 and pass

1. Routes identified with R: IGP and BGP Learn the same route, but the IGP learns that the ad is smaller, and the route identifies the route that the R,r identity does not put in the routing table, but is still passed to the other neighbors. You can view the routes identified by the R by command show ip BGP rib-failure.2. Two methods of restarting BGP:Hard restart: Clear IP

Dynamic routing protocols are divided into Internal Gateway Protocol (IGP) and External Gateway Protocol (EGP), depending on whether they are used within an autonomous domain. The autonomous domain here refers to a network with a unified management authority and a unified routing policy. The routing protocol adopted within the autonomous domain is called the Internal Gateway Protocol, which is commonly used in RIPandOSPF, and theexternal Gateway protocol is mainly applied to routing between mult

CONFIG prefix-listRouter (config) #ip prefix-list list-name seq permit/deny network/len ge/lePrefix-list was originally designed for BGP. The network address part and mask portion of the routing entry can be matchedIP prefix-list NAME Permit 172.16.0.0/22 ge le 24/22: prefix 22bit the sameGe24: Mask range min. 24 bitsLe24: Mask range Max 24 bitsWhen there is no GE, the mask range is the smallest and the prefix is the sameWhen there is GE, there is no

Before we start, let's start by thinking about several questions. What is a route? What are OSPF and BGP? What are their purposes? What are their application scenarios? What are the advantages of the two routing protocols in OpenBSD compared with hardware routers such as Cisco/Huawei? How to Use OpenBSD to reduce network costs? 1. What is a route? Simply put, a route is like a sign at a crossroads, and an IP packet is like a car on the road. Wh

instability is controlled locally to reduce the impact on the entire network and save CPU resources. Therefore, Internal/External BGP architecture is a better solution. 3.2 network logical hierarchy The core layer provides transmission functions to transmit route information and user traffic in each region. Divide management domains by region and connect them to the core layer 650) this. width = 650; "src =" http://img1.51cto.com/attachment/201309/15

1. Route Selection Protocol The core of routing protocol is routing algorithm, the router uses routing protocol to generate routing table, which can realize the "best" path of the network packets. 2. Classification of routing protocols Routing protocol is divided into internal Gateway Protocol IGP and External Gateway protocol EGP two kinds. The internal gateway protocol is used in the autonomous system's internal routing, the external gateway protocol is used in the autonomous system routi

Before analyzing the advantages of BGP dual-line data centers, we should first understand the implementation methods of BGP dual-line data centers. Dual-line is a technical concept and can be implemented in many ways. At present, Chinese IDC providers have proposed several dual-line implementation methods, such as "CDN dual-line", "dual-IP dual-line", "Single IP multi-line", and "

is to realize the exchange and learning of routing information. The ability to implement routing BGP typically used in large networks, which can accommodate more routing information; IGP protocol, the amount of storage for routing entries is limited, such as OSPF agreement, which can only accommodate 1W routing; IGP is the internal gateway protocol, as internal implementation of routing information exchange;

First, the experimental topology:Second, the experimental requirements:1, R4, R1, R3, R2 respectively in the BGP process deployment neighbor Send Community attribute command;2, R4 deployment ACL crawl 4.4.4.4 traffic, route-map named PL, call ACL, set community no-advertise, and invoke Route-map pl out in the BGP process;3. Verify: View R1 in 4.4.4.4 Item details Are you carrying: no-advertise, and do not p

If you have more than one Internet connection, you know that simply using the Boundary Gateway Protocol (Border Gateway PROTOCOL,BGP) makes it difficult to get the optimal routing path. At this point, the 7th signaling system without a telecommunications network is subtle (signaling system 7,SS7). As the control surface of the telecommunications network, SS7 can determine the best path before a call is established. There is no such control surface on