This slide contains the basic and advanced concept of OSPF routing protocol, according to the latest version of Cisco books, and I presented it at IRAN TIC company. In the next slide, I will upload an attractive advanced feature about OSPF.
he Associate level of Cisco Certifications can begin directly with CCNA for network installation, operations and troubleshooting or CCDA for network design. Think of the Associate Level as the foundation level of networking certification.
This tutorial gives very good understanding on CCNA Dynamic Routing Protocols.After completing this tutorial,You will find yourself at a moderate level of expertise in knowing Advance Networking(CCNA)
he Associate level of Cisco Certifications can begin directly with CCNA for network installation, operations and troubleshooting or CCDA for network design. Think of the Associate Level as the foundation level of networking certification.
This tutorial gives very good understanding on CCNA Dynamic Routing Protocols.After completing this tutorial,You will find yourself at a moderate level of expertise in knowing Advance Networking(CCNA)
Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing a faulttolerant default gateway, and has been described in detail in RFC 2281.
The protocol establishes a framework between network routers in order to achieve default gateway
failover if the primary gateway becomes inaccessible, in close association with a rapid-converging
routing protocol like EIGRP or OSPF. By multicasting packets, HSRP sends its hello messages to the
multicast address 224.0.0.2 (all routers) for version 1, or 224.0.0.102 for version 2, using UDP port 1985,
to other HSRP-enabled routers, defining priority between the routers.
This study guide is intended to provide those pursuing the CCNA certification with a framework of what concepts need to be studied. This is not a comprehensive document containing all the secrets of the CCNP nor is it a “braindump” of questions and answers.
I sincerely hope that this document provides some assistance and clarity in your studies.
In this webinar, we cover how Border Gateway Protocol works. Starting from key concepts, you'll learn about Autonomous Systems, the BGP protocol, AS Path, learning and advertising routes, RIBs and route selection. See the webinar recording at https://www.thousandeyes.com/webinars/how-bgp-works
CCNA Routing Fundamentals - EIGRP, OSPF and RIPsushmil123
- Basics of Routing
- Static Routing/Dynamic Routing
- Classification of Dynamic Routing
- Administrative Distance and Metric
- Link State Routing and Distance Vector Routing
- Routing Information Protocol (RIP)
- Enhanced Interior Gateway Routing Protocol (EIGRP)
- Open Shortest Path First (OSPF)
BGP (Border Gateway Routing Protocol) is a standardized exterior gateway protocol designed to
exchange routing and reachability information between autonomous systems (AS) on the Internet. The
Border Gateway Protocol makes routing decisions based on paths, network policies or rule-sets
configured by a network administrator, and are involved in making core routing decisions.
BGP is a very robust and scalable routing protocol, as evidenced by the fact that BGP is the routing
protocol employed on the Internet.
A PROJECT REPORT
On
CISCO CERTIFIED NETWORK ASSOCIATE
A computer network, or simply a network, is a collection of computer and other hardware components interconnected by communication channels that allow sharing of resources and information. Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Simply, more than one computer interconnected through a communication medium for information interchange is called a computer network.
Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing a faulttolerant default gateway, and has been described in detail in RFC 2281.
The protocol establishes a framework between network routers in order to achieve default gateway
failover if the primary gateway becomes inaccessible, in close association with a rapid-converging
routing protocol like EIGRP or OSPF. By multicasting packets, HSRP sends its hello messages to the
multicast address 224.0.0.2 (all routers) for version 1, or 224.0.0.102 for version 2, using UDP port 1985,
to other HSRP-enabled routers, defining priority between the routers.
This study guide is intended to provide those pursuing the CCNA certification with a framework of what concepts need to be studied. This is not a comprehensive document containing all the secrets of the CCNP nor is it a “braindump” of questions and answers.
I sincerely hope that this document provides some assistance and clarity in your studies.
In this webinar, we cover how Border Gateway Protocol works. Starting from key concepts, you'll learn about Autonomous Systems, the BGP protocol, AS Path, learning and advertising routes, RIBs and route selection. See the webinar recording at https://www.thousandeyes.com/webinars/how-bgp-works
CCNA Routing Fundamentals - EIGRP, OSPF and RIPsushmil123
- Basics of Routing
- Static Routing/Dynamic Routing
- Classification of Dynamic Routing
- Administrative Distance and Metric
- Link State Routing and Distance Vector Routing
- Routing Information Protocol (RIP)
- Enhanced Interior Gateway Routing Protocol (EIGRP)
- Open Shortest Path First (OSPF)
BGP (Border Gateway Routing Protocol) is a standardized exterior gateway protocol designed to
exchange routing and reachability information between autonomous systems (AS) on the Internet. The
Border Gateway Protocol makes routing decisions based on paths, network policies or rule-sets
configured by a network administrator, and are involved in making core routing decisions.
BGP is a very robust and scalable routing protocol, as evidenced by the fact that BGP is the routing
protocol employed on the Internet.
A PROJECT REPORT
On
CISCO CERTIFIED NETWORK ASSOCIATE
A computer network, or simply a network, is a collection of computer and other hardware components interconnected by communication channels that allow sharing of resources and information. Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Simply, more than one computer interconnected through a communication medium for information interchange is called a computer network.
he Associate level of Cisco Certifications can begin directly with CCNA for network installation, operations and troubleshooting or CCDA for network design. Think of the Associate Level as the foundation level of networking certification.
OSPF- Open Shortest path first, had conveyed the details of OSPF routing explaination which comes under Dynamic routing protocols and also configured OSPF Multi-area with the help of CISCO Packet tracer. The persons who were Pursuing CCNA will gain more exposure on overviewing this.
ospf is routing protocol.The OSPF protocol is a link state Protocol that handles routing for IP traffic.The two important concepts in case of OSPF are Autonomous Systems and Areas.
Basic Security in Routing and SwitchingReza Farahani
This slide covers fundamental of security in R&S and critical things about AAA and secure tunneling by IPSEC.
In this slide that I thought it at TIC company, you can find important terms about security and after that you can enhance your device configuration.
This slide contains fundamental concept about Quality of Service (QoS) technology and various types of Queuing Methods, according to the latest version of Cisco books (CCIE R&S and CCIE SP) and i taught it at IRAN TIC company.
Fundamental of Quality of Service(QoS) Reza Farahani
This slide contains fundamental concept about Quality of Service (QoS) technolog, according to the latest version of Cisco books (CCIE R&S and CCIE SP) and i taught it at IRAN TIC company.In the next slide, i upload advanced topic about this attractive technology.
this slide contains fundamental concept about VPLS protocol, according to the latest version of Cisco books and i taught it at IRAN TIC company.in the next slide, i upload attractive advanced feature about VPLS.
(Some of the pictures in this slide are borrowed from the wonderful site of my good friend Gokhan Kosem)
(www.ipcisco.com)
This slide contains concept about MPLS_VPNs specially L3_VPN protocol, according to the latest version of Cisco books(SP and R&S) and i taught it at IRAN TIC company.
In the next slide, i prepare title about MPLS L3_VPN Services and VPLS (MPLS L2_VPN)
This slide contains basic concept about MPLS and LDP protocol, according to the latest version of Cisco books(SP and R&S) and i taught it at IRAN TIC company.
i will prepare MPLS_VPN and MPLS_QoS and MPLS_TE later.
this slide contains basic and advanced concept about BGP routing protocol, according to the latest version of Cisco books and i taught it at IRAN TIC company.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
2. Routing Protocol
Interior Gateway Protocol (IGP): A routing protocol that was designed and intended for
use inside a single autonomous system (AS).
Exterior Gateway Protocol (EGP): A routing protocol that was designed and intended for
use between different autonomous systems.
2
7. DISTANCE VECTOR
A distance-vector routing protocol sends a full copy of its routing table to
its directly attached neighbors.
This is a periodic advertisement, even if there have been no topological
changes, a D.V routing protocol will, re-advertise its full routing table to
its neighbors.
Layer 3 LOOP
Split Horizon
Route poisoning
Poison Reverse
Triggered update
Hold-down timer
7
8. LINK-STATE
Routers use this information, stored in RAM inside a data structure called the link-
state database (LSDB), to calculate the currently best routes to each subnet.
The updates containing information called link-state advertisements (LSA).
8
9. LINK-STATE(CO)
9
This process uses something called the Dijkstra Shortest Path First (SPF)
algorithm.
LSDB works like the map, and the SPF algorithm works like the person reading
the map.
Each router uses itself as the starting point.
11. CLASSLESS & CLASSFUL
11
Some routing protocols must consider the Class and other routing protocols can
ignore Class A,B, and C rules altogether.
12. OSPF LINK STATE CONCEPTS
OPSF uses link state (LS) logic, which can be broken into three major branches.
RFC2328
The first step, neighbor discovery
The second step, topology database exchange
Each router stores topology information in its topology database (LSDB).
The third major step, route computation
OSPF uses SPF algorithm to analyze the data, choose the best route for each reachable subnet,
and add the correct information for those routes to the IP routing table
12
16. Router ID
16
Step 1:
Use the router ID defined in the router-id x.x.x.x OSPF router subcommand.
Step 2:
Use the highest IP address of any up/up loopback interface.
Step 3:
Use the highest IP address of any up/up non-loopback interface.
18. OSPF VERIFICATION
Command: show ip ospf
Show information on a variety of general OSPF and area state and configuration information.
show ip ospf interface [INTERFACE]
Show state and configuration of OSPF the specified interface, or all interfaces if no interface is given.
Command: show ip ospf route
Show the OSPF routing table, as determined by the most recent SPF calculation.
18
19. OSPF VERIFICATION
19
Command: show ip ospf neighbor
Command: show ip ospf neighbor INTERFACE
Command: show ip ospf neighbor detail
Command: show ip ospf neighbor INTERFACE detail
25. ADJACENCIES ON LANS
25
OSPF sends multicast OSPF Hello messages on LAN interfaces, to discover OSPF
neighbors, when two requirements are met:
OSPF has been enabled
The interface has not been made passive by the passive-interface router subcommand
26. Passive Interface
When a router configures an interface as passive to OSPF, OSPF quits sending OSPF Hellos, so
the router will not discover neighbors.
The router will still advertise about the interface’s connected subnet if OSPF is enabled on the
interface
26
27. HELLO MESSAGE FIELDS
OSPF Router ID
Hello interval
Dead interval
Subnet mask
List of neighbors reachable on the interface
Area ID
Router priority
Designated Router (DR) IP address
Backup DR (BDR) IP address
Authentication digest
27
29. OPTIMIZING CONVERGENCE
The Dead interval defines how long a router should wait, without hearing any Hello
messages from that neighbor, before deciding that the neighbor failed.
The neighbor resets its downward-counting Hold timer to 40 upon receiving a Hello from
that neighbor
To tune for faster convergence, you can configure OSPF to set a lower Hello and Dead
timer.
If the interface fails, OSPF will immediately realize that all neighbors reached through that
interface have also failed and not wait on the Dead timer
29
30. OPTIMIZING CONVERGENCE
30
Interface Command: ip ospf dead-interval <1-65535>
Interface Command: ip ospf dead-interval minimal hello-multiplier <2-20>
32. Regular Routing Method bottle-necks
32
Interface Command: ip ospf retransmit-interval <1-65535>
Interface Command: no ip ospf retransmit interval
33. OSPF AUTHENTICATION
Enabling per interface
Enabling on all interfaces in an area
Clear text per area
OSPF Command: area <0-4294967295> authentication
Enable on interface by : ip ospf authentication-key AUTH_KEY
33
34. OSPF AUTHENTICATION
MD5 per area :
area #n authentication message-digest
Enable on interface by : ip ospf message-digest-key KEYID md5 KE
Per Interface
ip ospf authentication-key AUTH_KEY
ip ospf authentication message-digest
Note: The maximum length of the key is 16
Show ip ospf interface
34
35. DR AND BDR
The end result of the DR election is that topology information is
exchanged only between special neighbors not all.
35
36. DR AND BDR
The DR concept prevents overloading a subnet with too much OSPF traffic when many
routers are on a subnet.
Because the DR is so important to the exchange of routing information, the loss of the
elected DR could cause delays in convergence
OSPF includes the concept of a Backup All routers except the DR and BDR are typically
called “DROther” in IOS show command output.
on each subnet, so when the DR fails or loses connectivity to the subnet, the BDR can
take over as the DR.
36
37. DR AND BDR Election
The router sending the Hello with the highest OSPF priority setting becomes the
DR.
If two or more routers tie with the highest priority setting, the router sending the
Hello with the highest RID wins.
The router with the second-highest priority becomes the BDR.
After the DR and BDR have been elected, the new better candidate does not
preempt the existing DR/BDR
37
38. DR AND BDR Command
38
Interface Command: ip ospf priority <0-255>
The range of priority values that allow a router to be a candidate are 1 ~ 255
42. STATIC DISCOVERY
For example in NBMA Networks : Frame Relay …
Interface Command: ip ospf network (broadcast|non-broadcast|point-to-
multipoint|point-to-point)
In our device like cisco LoopBack advertise by /32 and we can use above
command for change real define subnet loopback interface
42
46. LSA TYPE 1
An LSA type 1, called a router LSA, identifies an OSPF router based on its OSPF
router ID (RID).
Each router creates a Type 1 LSA for itself and floods the LSA throughout the
same area.
The Type 1 LSA in one area will list only interfaces in that area and only neighbors
in that area.
46
47. LSA TYPE 2
47
OSPF defines the Type 2 network LSA, used as a pseudonode
48. LSA TYPE 3
ABRs do not forward Type 1 and Type 2 LSAs from one area into another area, and
vice versa
This convention results in smaller per-area LSDBs, saving memory and reducing
complexity for each run of the SPF algorithm, which saves CPU and improves
convergence time.
OSPF advertises inter-area routes using the Type 3 summary LSA.
Type 3 summary LSAs do not contain all the detailed topology information, so in
comparison to Types 1 2, these LSAs summarize the information–hence the name
summary LSA.
48
49. PERIODIC FLOODING
OSPF does reflood each LSA every 30 minutes based on each LSA’s age variable.
If 30 minutes pass with no changes to an LSA resets the timer to 0, and refloods
the LSA.
Note also that when a router realizes it needs to flush an LSA from the LSDB for an
area, it actually sets the age of the LSA to the MaxAge setting (3600) and refloods
the LSA.
49
50. BEST OSPF ROUTES
Analyze the LSDB to find all possible routes to reach the subnet.
Note that OSPF supports equal-cost load balancing.
Lower cost but SPECIAL RULES :
Step 1.When choosing the best route, an intra-area route is always better than a
competing interarea route, regardless of metric
If an ABR learns a Type 3 LSA inside a nonbackbone area, the ABR ignores that LSA
when calculating its own routes
50
52. OSPF Virtual Links
52
In some cases two backbone areas exist; in other cases, a non-backbone area may not have a point of
connection to the backbone area.
53. OSPF Virtual Links
53
Extend Backbone Area but
Change use unicast packet
It’s temporary
54. TYPE 3 LSA FILTERING
On ABR1, filter subnet 3 from being advertised
On ABR2, filter both subnet 2 and 3
54
55. When “in” is configured, IOS filters prefixes being created and flooded into the
configured area
When “out” is configured, IOS filters prefixes coming out of the configured area.
55
56. ROUTE SUMMARIZATION
OSPF allows summarization at both ABRs and ASBRs but not on other OSPF
routers
The main reason is again that the LSDB must be the same for all routers in a single
area.
56
57. END OF PART 1
Next session :
Redistribution
Other LSA Types
OSPF V3
Thanks for your Attention
57