BGP - [Part 22] - BGP CONFDERATION

BGP Confederations -  BGP has two mechanism to reduce the number of IBGP peering -  Confederations Route Reflector Basically BGP c...

BGP - [Part 21] - ROUTE REFLECTOR CONFIGURATION

There are 3 IBGP routers. As per Split Horizon rule Router R1 can send a route to R2, and R2 will receive the route from R1 but it will ...

BGP - [Part 20] - ROUTE REFLECTOR

BGP Route Reflector -  As per BGP loop avoidance mechanism- Split Horizon Rule (Within IBGP), when a router learn routes from an IBGP pee...

BGP - [Part 19] - PEER GROUP CONFIGURATION

Initially as per our topology, we will add some static routes. Router1(config)#ip route 2.2.2.2 255.255.255.255 192.167.23.2 ...

BGP - [Part 18] - PEER GROUP

BGP Peer Groups -  Sometimes, some of the BGP neighbors share the exact same configuration, so you will have to type exact same command f...

BGP - [Part 9] - UPDATE SOURCE LOOPBACK

Without "update-source loopback" Command Configuration -  R1 Configuration - interface Loopback1  ip address 1.1.1.1 2...

BGP - [Part 8] - EBGP MULTIHOP

In EBGP, by default only two directly connected Cisco IOS router can establish a neighbor adjacency. So as per BGP requirement, the exter...

BGP - [Part 7] - NEXT HOP SELF

With Next Hop Self Now we will advertise the network for point to point r each-ability and will use "next-hop-self" com...

BGP - [Part 6] - NEXT HOP SELF

Before BGP Next Hop Self, we should know the "what is the next hop exactly ?". Next hop is IP to reach the next Autonomous Syste...

BGP - [Part 5] - LOOP PREVENTION MECHANISM

BGP uses two mechanism to prevent loops:- Split Horizon Rule As per BGP loop avoidance mechanism- Split Horizon Rule (Within IBGP), wh...

BGP - [Part 17] - MED ATTRIBUTES - INTERVIEW QUESTIONS

Question - 1 Explain BGP MED attribute. Always  lowest MED  will be preferable. It is   Optional non-transitive  attribute. MED is ex...

BGP - [Part 16] - ORIGIN CODE ATTRIBUTES - INTERVIEW QUESTIONS

Question - 1 Explain BGP Origin Code attribute. There are three origin code.  i - IGP , e - EGP, ? - INCOMPLETE i - IGP   -  You c...

BGP - [Part 15] - AS_PATH ATTRIBUTES - INTERVIEW QUESTIONS

Question - 1 Explain BGP AS-PATH attribute. AS_Path is the number of ASNs in the AS Path. It is  Well-known mandatory   attribute. Al...