routing protocol
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BGP and BGP Path Attributes
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BGP, which stands for Border Gateway Protocol, is a standardized exterior gateway protocol used in computer networking and the internet to exchange routing and reachability information between autonomous systems (ASes). Autonomous systems are networks or collections of networks that are administered by a single organization and operate under a common […]
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What is Routing Protocol? OSPF vs RIP vs EIGRP
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What is Routing Protocol? A routing protocol is a set of rules and procedures that routers use to exchange information about network topology and determine the best path for forwarding packets. Routing protocols are used to build and maintain routing tables, which contain information about the reachability of […]
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interview question and answer, Network Security interview questions and answers, routing protocol, switchingETHERCHANNEL INTERVIEW QUESTIONS & ANSWERS
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ETHERCHANNEL INTERVIEW QUESTIONS & Answers Q. What is ETHERCHANNEL? Ans – Etherchannel is an aggregation or bundling of multiple physical link into single virtual link. Q. Benefits of ETHERCHANNEL? Ans- it provides more Bandwidth by combining multiple physical link into single virtual link. […]
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Why Ospf Neighbors Stuck In Init State or 2-way or Exchange
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Why Are Ospf Neighbors Stuck In Init State— 1- INIT State OSPF can be stuck in INIT due to the mismatch in hello packet parameters such as . –>> Hello/dead intervals. –>> Authentication. –>> Stubflag. –>> Interface subnet mask. –>> Area ID . MTU will come into the picture when […]
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BGP interview questions
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BGP protocol interview questions Q. What is a Local Preference? Q. What is the difference between EBGP and IBGP neighborship ?Q. What transport protocol does BGP use? Q. What is an AS_PATH and what is it used for? Q. How can you use BGP for load balancing traffic outbound? Q. […]
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Network engineer Interview Question
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Networking Interview Question for routing protocol OSPF Q. How many types of area exist in OSPF and types of LSA are allowed ? Q. Different OSPF packet types ? Q. If you see how as DRother under show ip ospf neigbor . Whats wrong with the output ? Q. […]
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ospf scenario
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ospf scenario Highest IP address ABR routes convert the type7 into type 5. Default route is not generated by default in area nssa unless “are nssa <> default originate ” configured. Totally stubby NSSA area generate the default route by default. DR/BDR does not support the preempt therefore if DR […]
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ospf scenario based questions
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ospf scenario based questions Scenario 1 – OSPF full neigborship is not coming up between routers — 1. Hello and Dead timer or Area ID, Authentication password/type/key or Area type are mismatch between router.2. Trying to build OSPF neigborship on secondary address.4. OSPF not enabled on correct interface […]
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eigrp scenario based interview questions and answers
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We are discussing about EIGRP Scenario based question – Scenario 1 – EIGRP neighbor not coming up – 1.AS number mismatch between neighbors.2.K value mismatch between routers.3.IP is on different subnets4.Primary and secondary address on interface mismatch between routers.5.layer 2 switch/hub connecting different subnet devices in the same VLAN. For […]
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bgp troubleshooting scenarios
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BGP Troubleshooting Scenario 1- There are some reason router do not establish neighborship with peer- This is very important question for interview also 1) Peer ip address is not reachable. 2) port 179 is blocked by a firewall or access list. 3) BGP configuration is not correct like wrong […]