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Before we discuss the BGP MPLS Design Questions regarding the CCIE R&S Lab Exam, let’s first understand the BGP/MPLS Roles and Responsibilities which a Network Professional would fulfill.
Introduction to BGP/MPLS Network Professional’s Roles and Responsibilities:
Nowadays, almost each and every service provider around the world are utilizing BGP and MPLS deployments throughout their cloud so as to provide and manage millions of network infrastructure of clients along with better service availability and performance.
MPLS is particularly well suited in carrier networks as well as in commercial wide area networks. BGP and MPLS deployments would be ensuring the flawless connectivity and routine activities in multi-protocol network infrastructure as well as maintaining the excellent communication service approach without having any barrier as both are openly considered to be standard technologies. Also, if you wish to gain proper knowledge, you should join the courses offered by the SPOTO, to enhance your knowledge.
A BGP or MPLS network professional are required to have moderate to excellent understanding of enterprise or carrier’s network infrastructure. Their job roles would be often involving 24×7 support for network services along with both planned as well as unplanned work shifts.
Now, below mentioned are some questions regarding the BGP and MPLS that would be asked to the candidates in the interviews.
Q. What is MPLS? Mention its benefits.
A. This question is one of the most common questions which would be asked during the MPLS interviews, so candidates are required to prepare for this question before facing the interview. First, you are required to start with an Introduction to MPLS.
Multiprotocol label switching (MPLS) provides a mechanism to process packets on the basis of labels. It would be considered as a data forwarding service that would be providing high-end network communications from one network node to the next one on the basis of labels rather than routing table lookups. Routing table lookup for each packet would be making the communication sluggish but MPLS utilizes LFIB or forwarding the table to process label from one node to another.
The main benefits of using MPLS are:
·QoS integration supports multiple levels of QoS, so as to manage latency, jitter and packet loss for various types of traffic such as voice, video, bulk file transfers, email, etc.
·Fast convergence: switching on the basis of a label, no need to look up for the routing tables.
·Providing Scalability to IP VPNs.
·Low network congestion by utilizing MPLS TE.
·Reliable as well as secure.
Q. Name BGP path attributes so as to control incoming as well as outgoing traffic.
A. BGP might have multiple paths attributes about influencing traffic flow. In the most common practice, we do for manipulating incoming traffic using AS-Path pre-pending as well as MED is otherwise known as a multi-exit discriminator. And, in order to influence outgoing traffic, weight as well as local preference, would be the best choice.
Q. If my BGP neighbor is being stuck in an idle or active state, what should we do?
A. If BGP peer is considered to be in idle state, then it could be due through the physical connectivity failure or the neighbor wouldn’t be defined properly with respective AS. In connect state, BGP would try to establish a TCP session over port number 179; if it fails to establish the connection, then it might go in order to the active state, where it would try again to establish a TCP connection.
There were few questions which could be asked in the CCIE R&S Lab exam, regarding the BGP and MPLS. To gain full access to the content, join the courses offered by the SPOTO. They are the best when it comes to studying dumps for CISCO.
