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Aug 2 2017

BGP Interview Questions For CCNA and CCNP Engineers #multihomed #bgp


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Answer to Question 25

25. Define various types of communities and why they are used?

Answer: 4 Types of community:

1. internet The Internet community.

2. no-export Routes with this community are sent to peers in other subautonomous systems within a confederation. Do not advertise this route to an external BGP (eBGP) peer. External systems are those outside the confederation. If there is no confederation, an external system is any eBGP peer.

3. local-as Send this route to peers in other subautonomous systems within the local confederation. Do not advertise this route to an external system.

4. no-advertise Do not advertise this route to any peer (internal or external).

Now why they are used? Thats a good question.

what is the answer for Q 11

weight is cisco proprietary

What are the answers to these question to cross reference against what i researched.

Vincent Lo said.

I am in serious need for a pump. Too much stress at work. Does anyone work on Huawei certification. Could someone please send me braindump and answer to exam questions.

where i can find the ans of these all question?

pls provid ethe answers dude so that i can crossverify with my answers.

Nice blog and gives important information about CCNA Training Course. Thanks for the posting blog for CCNA and other IT trainings. You can find more information at bookmybootcamp

1. BGP is IGP or EGP? EGP
2. BGP is link state or distance vector protocol? PAth Vector
3. BGP uses which port? 179
4. When to use BGP? between multiple ASes
5. Can I use BGP instead of any IGP? yes
6. Can I run two BGP process on single router?yes
7. What is Autonomous System?
network maintained under single administration
8. Types of BGP routing table?

9. What is the BGP path selection criteria?
least no.of ASes
10. Define various BGP path attributes.AsPath,weight,MED,origin,nexthop,locPref
11. Why weight doesn t fall under path attribute category?
cisco proprietery
12. What is confederation?
dividing ASes into sub ASes
13. What is route reflector and why it is required?
instead of full mesh form adjacnecy with RR
19. What is the cost of external and internal BGP routes?E-20,I-200
28. I am having two routes for remote destination but only single route is installing in routing table, what s the reason for this?Best path is installed
29. How many links can be assigned for load balancing or sharing?1-6
35. A router is receiving same route from two different eBGP peers. The AS information contains in peer 1 is <65500, 65550, 65555> and in peer 2 is <65501, 65501>. But I want to make peer 1 preferred.increase the weight
37. Define loop prevention mechanism in BGP.Based on ASes if a router sees its own AS no.in the route it drops.

Answer For Question No 6: 6. Can I run two BGP process on single router?
Answer: You cannot run more than one BGP process on Cisco IOS as it is a single threaded or monolithic Operating System and uses Run to Complete Scheduler Algorithm, uses IOS as single image and all processes uses same memory space for processing.
On Low end routers we only have single RP (Route Processor)

You can Run Multiple BGP Process on High End routers like Cisco CRS 1 onwards. as Cisco Uses different IOS called Cisco IOS – XR, Which differentiates kernel from processes and each process can run on its own RP or separate memory space.

Can t we run multiple BGP on Virtual Router, Routing Instance.

Can t we run multiple BGP instances on Virtual Router, Routing Instance.

we cannot run separate instance of routing protocol under VRF, we can define and use multiple address families under VRF For single instance of routing protocol

shivlu can we have answer of these as well

type of routing table bgp has i didn t understand this question

pls tell and also provide answer

ANS 35: we can use local preference or AS path preped.

Dear blogger please provide anwers for the every questions.these questions are really tough.

ANS 35: we can use local preference or AS path preped.

Dear blogger please provide anwers for the every questions.these questions are really tough.

ans 35: we can use local preference or AS-path preppend..

Dear blogger please share answers for all the questions..as these questions wil be very informative..hats off to you.

Can anyone please tell when to use mpls/vpn

when you want core must be bgp free.


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