vlsm subnetting

We will learn about subnets and CIDR (classless Inter-Domain Routing. We hope to learn this knowledge more easily than some books provide.Let's first figure out one thing: there is no "category" in the subnet. In the past, networks were divided into Class A, Class B, and class C. These networks can only be divided into equal parts. Therefore, we have introduced a variable length Subnet Mask (VLSM) to solve this problem. The Class C network in the old

the network size. Its addressing scheme uses the concept of "class. The definitions of IP addresses A, B, and C are easy to understand and divide. However, in actual network planning, they are not conducive to effectively allocating limited address space. For Class A and Class B addresses, few companies can use such A large scale, and the number of hosts for Class C addresses is relatively small. Therefore, a type of IP address is not conducive to effectively allocating limited address space, a

-if) # frame map ip 192.168.1.1 301 broadcast defines a ing between the frame relay and the ip address. R3 (config-if) # bandwidth 64R3 (config-if) # frame-relay interface-dlci 301 set the DLCI value R3 (config-if) # no shutR3 (config-if) # exitR3 (config) # router ospf 101 configure ospf route R3 (config-router) # net 10.1.3.0 0.0.255 area 0R3 (config-router) # net 192.168.1.0 0.0.0.255 area 0 note: the VLSM technology needs to use no auto-summary In

Electricalconnectors,thefrequenciestobroadcaston,themodulation schemetouseandsimilarlow-levelparameters,arespecified here. #Services #:bit-by-bit;standardizedinterface ....} 8.ipaddress{bits->decimal111111111286432 168421--------------------------------------------------bits: 1-8,9-16,17-24,25-32class:a: (0-127) 0xxx xxxxhost,host,hostb: (128-191) 10xx xxxxnetwork,host,hostc: (192-223) 110xxxxxnetwork,network,networkd: (224-239) 1110xxxxmulticastgroup,multicastgroup,multicastgroup1. A:10.0.0.0

has the classless feature and supports VLSM and CIDR. However, RIPv2 Enables automatic aggregation by default. This command is used to disable the automatic summary feature. [PL3]Although r12002 is a classless routing protocol, the method for declaring a route is the same as that for r12001, or the primary network number. [PL4]This command is used to view the RIP route. In the same way, you can add the keywords connected, static, ospf, and VPN after

. Configure the ODR on the central router RouterB. Run the command: RouterB (config) # router odr to view the route table of the remote router and the central router RouterB again: routerARouterB finds that a default route entry starting with "o" is added to RouterB, and three route entries starting with "o" are added to RouterB, here, o is short for ODR, rather than OSFP. Note: In the route table, ODR uses the lowercase letter "o". The management distance is 160. after the central router is con

---------- DUAL algorithm supports vlsm cidr. Compared with RIP, it does not support generating a CIDR route, but supports passing a CIDR route. x. x. x. This method cannot be used, but you can generate a redistributed to rip forwarding record. Some updates support multiple network layer protocols, such as ip ipx .. Flexible network design supports multicast, unicast Update-neighbr + local out-of-the-box interface supports manual Summary of routes. B

Description: After the use of IP to identify each network node, if the two nodes separated by multiple network nodes to communicate, need to "man-in-the-middle" strings, the step by step notice a node data, to go to the end of the node step-by-step how to go.Static routing: Manually configure static routing information that can be forwarded using a leased line interface or a next-hop IP address based on the routing information when forwarding packets with matching destination addresses.Advantage

largest interface IP address as the router identity;5. Zone ID: In a multi-zone network, specify a zone ID for each region6. Authentication type: OSPF supports different authentication methods, the Hello packet sent to the multicast address 224.0.0.5 is authenticated to be received;(one) Advantages of OSPF:1. The link state protocol uses a layered network structure that reduces the spread of LSA and reduces the likelihood that network topology changes affect all routers;2. The link-State protoc

broad routing protocols. belong to the internal Gateway routing protocol, can adapt to various scales of network environment, is a typical chainThe road State (link-state) protocol.The OSPF routing protocol spreads the link state information of the device to the whole network, so that each device in the net synchronizes aA database (LSDB) with a full network link state, then the router uses an SPF algorithm that takes its own root and calculates theThe shortest path to other networks, eventuall

the development of the network, some concepts of the network, the introduction of ②osi seven-layer model of the introduction of ③TCP/IP protocol cluster, including tcp/three times handshake and four wave of the process ④vlsm variable eldest son net concept Network topologyNetwork topology is the physical layout of the various devices that are interconnected by transmission media. Topology Refers to the specific physical, i.e. real, or logical, virtua

EIGRP(enhanced Interior Gateway Routing Protocol )Enhanced Internal Gateway Routing protocolFeatures of EIGRP:· EIGRP is a Cisco Private routing protocol that employs the DUAL(diffusion update algorithm).· EIGRP belongs to IGPand is the Hybrid protocol, based on IP Pro.• Multicast, unicast update, multicast address 224.0.0.10• Supports load balancing with equal / unequal prices. • Support VLSM, manual summary.• Support for multiple network protocols

supports variable eldest-son netmask (VLSM), while RIPV1 is not supported. RIPv2 supports interface validation, while RIPV1 is not supported. When using two different versions, the RIPV1 can receive the routing information of the RIPV2, otherwise it is not. RIP two packet transfer information: Update and request. The router is approximately every 30 seconds or so (there is a random time, avoiding too much routing information on th

" Management on the part of " 1 eigrp main features: nbsp; ① cisco proprietary protocol ( advanced DV route ) ② support VLSM;③ trigger, incremental update; --------- reduce the bandwidth footprint④ supports multilayer network protocols a ppll E t a lk , IP and Nove ll n Etware and other protocols; nbsp; ⑤ convergence speed; - ----- ---- with dual algorithm implementation ⑥ Support LAN and the

]--scheduler-s Scheduler one of RR|WRR|LC|WLC|LBLC|LBLCR|DH|SH|SED|NQ,--real-server-r server-address Server-address is host (and port)--masquerading-m masquerading (NAT)--gatewaying-g gatewaying (Direct routing) (default)--delete-server-d Delete Real Server--persistent-p [Timeout] Persistent service--set TCP tcpfin UDP set connection timeout values--weight-w weight capacity of real serverMore detailed parameter reference: Ipvsadm--helpmanually binding the VIP on the RS sideExecute on each real s

1-EIGRP TestEIGRP is an efficient routing protocol with the following features:1. Establish and maintain neighbor relationships by sending and receiving Hello packets, and exchanging routing information;2. Use multicast (224.0.0.10) or unicast for routing updates;3. EIGRP has a management distance of 90 or 170;4. Use trigger update to reduce bandwidth consumption;5. Support variable eldest son netmask (VLSM), turn on Auto summary function by default;6

6th. TCP/IP routing protocol fault handlingFirst, the default gatewayWhen the destination address of the package is not in the router's routing table, such as when the router is configured with a default gateway, it is forwarded to the default gateway or discarded.show IP route; View the default gateway for Cisco routersSecond, static and dynamic routingThird, processing k_protocal/04937.htm "target=" _blank ">rip faultRIP is the distance vector routing protocol, and the metric is the hop count.

Equipment"Three-layer Switch 1 unitsRouter 2 unitsCrossover line or straight wire 3 strips"Pre-knowledge"Router basic configuration knowledge, OSPF"Experimental principle"OSPF (Open Shortest Path first, open Shortest Path Priority) protocol, is currently the most widely used networkOne of the broad routing protocols. belong to the internal Gateway routing protocol, can adapt to various scales of network environment, is a typical chainThe road State (link-state) protocol.The OSPF routing protoco

Cisco Route Protocol RIP v2 (1)This is not repeated. The one I made is RIP Version1. This is RIP Version2. If it is written into an article that is too long, it will be written separately.* Note: This article is intended for the majority of users to learn. Some of them will mention some professional Internet terms or abbreviations. If you do not understand the network, you can learn and explore it together. If you have any questions, you can add QQ or YY. (QQ: 914560310, YY: 283755973) "//" is n

650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M00/43/93/wKiom1Pbep7Bc6L5AABomL_VOTk718.jpg "Title =" clipboard.png "alt =" wkiom1pbep7bc6l5aabml_votk718.jpg "/> Cisco configures dynamic routing, which can be configured using the enhanced internal gateway routing protocol. Supports: Fast Convergence: dual (dispersion update algorithm) is used to achieve rapid convergence. Effective use of bandwidth: Send partial or Incremental Route updates, instead of sending the entire route tab