Question 1          How do I configure BGP?Question 2          Can I use BGP instead of any IGP?

Question 3          Can I run two BGP processes on single router?

Question 4          Types of BGP routing table?

Question 5          How do I configure BGP with the use of a loopback address?

Question 6          Explain Border Gateway Protocol (BGP)?

Question 7          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. How can we do that?

Question 8          What is BGP RFC 3107 or what is BGP Label Update in IPv4?

Question 9          In Multi-homing scenario if primary link gets fail, after how long traffic will be shifted to secondary link.

Question 10        BGP is link state or distance vector protocol?

Question 11        What is the order of preference of attributes when some or all are applied to one neighbor in BGP?

Question 12        What does a next hop of 0.0.0.0 mean in the show ip BGP command output?

Question 13        Can Routers on different subnet become BGP neighbors?

Question 14        What is Autonomous System?

Question 15        What is BGP Graceful Restart, NSR and NSF?

Question 16        BGP Redistribution Vs MPLS, which one you will select?

Question 17        Best practices to define BGP Communities as per RFC 1998.

Question 18        What are the well-known communities of the BGP community attribute?

Question 19        What formats can I use to configure the BGP community attribute?

Question 20        What TCP port number BGP use for connection?

Question 21        How does BGP behave differently with auto-summary enabled or disabled?

Question 22        How can I verify if a BGP router announces its BGP networks and propagates them to the global BGP mesh?

Question 23        Difference between eBGP and iBGP neighbor?

Question 24        When and how should I reset a BGP session?

Question 25        Is there any special configuration needed on PIX/ASA to allow BGP sessions through it?

Question 26        What is an autonomous system (AS) number and how do I obtain one?

Question 27        What Administrative Distance BGP uses for iBGP & eBGP ?

Question 28        What is the BGP path selection criteria?

Question 29        What is the difference between always-compare-med and deterministic-med?

Question 30        Explain Loop prevention mechanism in BGP?

Question 31        Do internal BGP (iBGP) sessions modify the next hop?

Question 32        Do external BGP (eBGP) sessions between confederations modify the next hop?

Question 33        Do we need to follow 3 way handshake process to establish BGP communication?

Question 34        In external BGP (eBGP) sessions, which IP address is sent as the next hop?

Question 35        Does route reflector come in actual path during traffic forwarding?

Question 36        Does it require that BGP router-id should reachable in cloud?

Question 37        What is recursive lookup in BGP and how it works?

Question 38        Does the route reflector change the next hop attribute of a reflected prefix?

Question 39        What is the difference between hard reset and soft reset in BGP?

Question 40        How can I announce a prefix conditionally to one ISP only when I lose the connection to my primary ISP?

Question 41        How can I configure BGP to provide load sharing and redundancy in my network?

Question 42        What are different BGP Message Types?

Question 43        What can happen if Route Reflector (RR) is not getting proper route updates?

Question 44        What is route reflector synchronization?

Question 45        How to use BGP as PE-CE backdoor link?

Question 46        How much memory should I have in my router to receive the complete BGP routing table from my ISP?

Question 47        What are the benefits of configuring BGP peer groups?

Question 48        Explain various states of BGP?

Question 49        Why do I see the same route twice from the same peer in BGP?

Question 50        What is synchronization, and how does it influence BGP routes installed in the IP routing table?

Question 51        What is the meaning of update source loopback?

Question 52        In eBGP I am establishing my neighborship with loopback address but it’s not coming up. Please specify different reasons for not coming up.

Question 53        What is Hierarchical FIB – BGP-PIC?

Question 54        If a static route is advertised in BGP without using update source what will be the next hop address in update?

Question 55        What is the advantage of using BGP AS Prepend?

Question 56        Can we use BGP as backdoor link for customers instead of OSPF? If yes, please let us know what could the issues BGP create?

Question 57        What is BGP PIC?

Question 58        What is the BGP path selection criteria?

Question 59        Define various BGP path attributes.

Question 60        Why weight doesn’t fall under path attribute category?

Question 61        What is confederation?

Question 62        Define various types of communities and why they are used?

Question 63        How do I know which Cisco IOS software release supports a particular BGP feature?

Question 64        How can I set the Multi Exit Discriminator (MED) value on prefixes advertised to external BGP (eBGP) neighbors to match the Interior Gateway Protocol (IGP) next hop metric?

Question 65        Can we redistribute BGP in IGP? Please explain your answers.

Question 66        What is cluster-id?

Question 67        I am receiving updates from eBGP peer, will the next hop change or not?

Question 68        Explain BGP Weight attribute?

Question 69        What is the difference between next-hop-self and update source loopback?

Question 70        Define loop prevention mechanism in BGP.

Question 71        What is the default BGP ConnectRetry timer, and is it possible to tune the BGP ConnectRetry timer?

Question 72        What does r RIB-Failure mean in the show ip bgp command output?

Question 73        Explain BGP Local preference?

Question 74        What is route reflector and why it is required?

Question 75        What is no-synchronization rule?

Question 76        How can I redistribute internal BGP (iBGP) learned default-route (0.0.0.0/0) route into EIGRP/OSPF/IS-IS?

Question 77        How can I filter all IP routes advertised to a BGP neighbor except the default route 0.0.0.0/0?

Question 78        How to resolve the error- “Protocol not in this image”?

Question 79        Explain BGP MED?

Question 80        What is the cost of external and internal BGP routes?

Question 81        What will happen if route reflector is not getting proper updates?

Question 82        What will happen if route reflectors does not synchronize?

Question 83        Use BGP as Link Protection in case of Dual PoP?

Question 84        BGP: timer-wheel running slow by 1 ticks appears in the debug output.

Question 85        Is it possible to track an interface and change the route availability?

Question 86        How does IP RIB Update allocate memory?

Question 87        What is Recursive Lookup?

Question 88        What is the command to see IPv6 BGP neighbors?

Question 89        Summary in BGP causes all subnets of 10.150.0.0 to be advertised?

Question 90        Why are there no statistic results when I use the debug bfd events and debug bfd packets commands?

Question 91        If BGP neighbor state is showing idle what does it mean?

Question 92        How many links can be assigned for load balancing or sharing?

Question 93        Can we use local preference outside the autonomous system?

Question 94        Does the router have to be restarted after a new BGP Neighbor Maximum Prefix is configured?

Question 95        Is there a command to check the advertised routes along with the prepend of the AS-paths?

Question 96        How does neighbor soft-reconfiguration inbound command function?

Question 97        What does the %BGP-3-NOTIFICATION: sent to neighbor *A.B.C.D passive 6/0 (cease) 0 bytes error message mean?

Question 98        What does the %IPRT-3-ROUTEINSERTERROR: Error inserting routing entry error message mean?

Question 99        Does GSR with Cisco IOS-XR support the VPLS-BGP auto-discovery feature as a Route Reflector?

Question 100      What is the command to administratively disable BGP neighborship?

Question 101      I am having two routes for remote destination but only single route is installing in routing table, what’s the reason for this?

Question 102      How to achieve Inter-AS Communication-MP-eBGP?

Question 103      How do I debug routes for a particular VRF in the Cisco IOS-XR environment?

Question 104      What is the difference between when a route is injected in BGP via redistribute command or a network command?

Question 105      How do I verify Layer 4 forwarding summary information?

Question 106      What is the difference between Local Preference and MED?

Question 107      Default BGP timers.

Question 108      When does BGP use 0.0.0.0 router id?