bgp routing table example

ensure that routing information is properly broadcast to each router. According to this principle, the total number of I-BGP sessions in an autonomous domain is NX (N-1)/2 (n is the number of routers running I-BGP), and when n grows, the number is staggering: 100 routers, the number of sessions is 4950. This is a huge burden for network devices, and it will comp

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 th

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

A key problem statement (a) How does the ACL match the same subnet and the different mask routing entries? How do I match the same mask, different entries for subnets? (ii) Why does a summary route cause the rollover of a BGP neighbor? (iii) Why does the ACL not match the route entry when using Attribite-map? (d) How to use Advertise-map,suppress-map,unsuppress-map,attribute-map and Route-map five-way m

up with a solution, that is, to use the "routing policy" to increase the management distance of Route entries sent by EBGP 99.99.99.0, alternatively, the Management Distance from the 99.99.99.0/24 route entries received by the Network in the same way is smaller than that of the EBGP 20. The routing policy is to make a routing policy based on the content of the r

The BGP protocol runs on top of TCP and, as a result, it inherits all vulnerabilities of TCP connections. For example, in a BGP session, an attacker could impersonate a legitimate BGP neighbor, and then persuade the BGP router on the other end to share

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 Inte

connection interface. It sends the number to R1 and R1 searches for the route and finds the route matching 10.6.0.0/16, the next hop is 10.0.0.2, not a direct connection interface. The next hop is the destination IP address for recursive search routing, matching 10. 0 .. 02/32 route. The next hop is 10.0.1.5, which is a direct connection interface. data is sent to R3. R3 searches for the route based on the target IP10.6.6.1. If no matching item is fo

3IP Route 1.1.1.1 255.255.255.255 10.1.12.1 Track 3!!!Access-list 1 Permit 192.168.2.0 0.0.0.255Access-list 2 Permit 192.168.1.0 0.0.0.255R1 down one of the interfacesR2 Tipsr2#*mar 1 02:34:50.951:%bgp-5-adjchange:neighbor 10.1.12.1 down BGP Notification sentr2#*mar 1 02:34:50.955:%bgp-3-notification:sent to neighbor 10.1.12.1 4/0 (hold time expired) 0 bytesr2#r

automatically expand into three processes, which act as parent processes, process session processes, and take charge of route computing processes. The parent process runs as root, while other processes are not.650) this. width = 650; "src =" ../attachment/201201/162320508 .jpg" border = "0" alt = ""/>From this, we can see that the parent process is responsible for communicating with the peer vro, querying and updating the route table, and processing

determine whether to publish secondary network segments) neighbor 12.1.1.2 remote-as 2 neighbor 12.1.1.2 update-source Serial1/0 neighbor 12.1.1.2 advertise-map dist_out2 exist-map line2 (if the external line 2 is normal, the route entry of the external line 2 will be re-distributed to the bgpl route table, and the secondary route will be advertised. If 2 is normal, and it can be advertised from s1/0 [first-line port] Neighbor

selection of N7K-1 flow is based on the routing principle of the last "select a smaller neighbor address routing", N7K-1 neighbor address is 30.207.7.41, N7K-2 is 30.207.7.45, so select the N7K-1. 4. Add a maximum-path ibgp 5 in the BGP configuration. A maximum of five equivalent routing loads are allowed for troubles

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 as, call ACL, set community Local-as, and call Route-map as out in the BGP process;3, verify: R1, R3 have 4.4.4.4, but R2 have no 4.4.4.0 route entry?Third, command deployment: