EIGRP INTERVIEW QUESTION.pdf - EIGRP(Enhanced Interior Gateway Routing Protocol Important points about EIGRP EIGRP is a Cisco proprietary protocol which

EIGRP INTERVIEW QUESTION.pdf - EIGRP(Enhanced Interior...

This preview shows page 1 - 3 out of 14 pages.

SHARAFAT ALI Mob No. -8305012450 1 EIGRP (Enhanced Interior Gateway Routing Protocol) Important points about EIGRP EIGRP is a Cisco proprietary protocol which means it will work only on Cisco routers. EIGRP is also called advanced distance vector or Hybrid routing protocol. Multicast or unicast is used for exchange of information. Multiple network layer protocols are supported. 100% loop-free. By default, EIGRP will limit itself to use no more than 50% of the interface bandwidth. Maximum Hop-Count is 255[100 by default] EIGRP is classless protocol EIGRP supports VLSM and authentication EIGRP uses Diffusing Update Algorithm (DUAL) to determine the best path among all “feasible” paths. DUAL also helps ensure a loop-free routing environment. EIGRP will form neighbor relationships with adjacent routers in the same Autonomous System (AS) EIGRP uses RTP (Reliable Transport Protocol) and its function is to deliver EIGRP packets between neighbors in a reliable and ordered way. All EIGRP routing information are exchanged between neighbors via multicast using the address 224.0.0.10 K-Values are used for calculating metric. By default EIGRP consider k1 and k3 only. EIGRP having internal Administrative distance as 90 and external AD as 170 EIGRP summary route AD value is 5. In EIGRP Summarization is enabled by default."No auto-summary" command is needed because by default EIGRP will behave like a classfull routing protocol which means it won’t advertise the s ubnet mask along the routing information. For example 1.1.1.0/24 and 2.2.2.0/24 will be advertised as 1.0.0.0/8 and 2.0.0.0/8. Disabling auto-summary will ensure EIGRP sends the subnet mask along. EIGRP converges rapidly after link failure. EIGRP can load balance on both equal and unequal cost paths."Variance" command is used to configure load balancing. EIGRP supports up to 6 loop-free paths with a metric lowers than the product of variance and the best metric. Manual summarization can be enabled at any interface. If a packet is not acknowledged, EIGRP re transmit the packet to the non responding neighbor as a unicast. No other traffic is sent to this neighbor until it responds. After 16 unacknowledged re- transmissions, the neighbor is removed from the neighbor table The process of neighbor discovery and route exchange between two EIGRP router is as follows :- Router A sends out a hello Router B sends back a hello and an update. The update contains routing information Router A acknowledges the update Router A sends its update Router B acknowledges
Image of page 1
SHARAFAT ALI Mob No. -8305012450 2 Advantages of EIGRP EIGRP uses AS (Autonomous system) number ranging from 1-65535 to identify collection of routers that share same information. EIGRP have less convergent time and is more efficient.
Image of page 2
Image of page 3

You've reached the end of your free preview.

Want to read all 14 pages?

  • Summer '20
  • Cisco Routers, Sharafat Ali

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes