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Dec 21

Enhanced Interior Gateway Routing Protocol (EIGRP) Explained

Enhanced Interior Gateway Routing Protocol

EIGRP (Enhanced Interior Gateway Routing Protocol) is a system that lets switches transfer data more proficient than with prior system conventions. EIGRP developed from IGRP (Interior Gateway Routing Protocol) and switches utilizing either EIGRP and IGRP can interoperate on the grounds that the measurement utilized with one convention can be converted into the measurements of the other convention. EIGRP can be utilized for Internet Protocol (IP) o for AppleTalk and Novell NetWare networks. Using EIGRP, a switch keeps a duplicate of its neighbor’s directing tables.

Highlights of EIGRP

Regulatory Distance — 90 (interior) 170 (outer).

EIGRP has the properties of Distance Vector and Link State directing convention. EIGRP switches update each other through multicasting utilizing multicast IP 224.0.0.10. It also Supports MD5 confirmation on switches running EIGRP.

EIGRP has three conditions that must be met for neighbourship foundation:

  • Neighbor switches should be in a similar IP subnet.
  • Self-ruling System number should coordinate.
  • K1, K2, K3, K4 and K5 qualities should coordinate between both the neighbor switches

EIGRP Metric Calculation

  • Data transfer capacity (K1) — By default is set to 1.
  • Postponement (K3) — By default is set to 1.
  • Dependability (K4 and K5) — By default is set to 0.
  • Burden (K2) — By default is set to 0.

EIGRP Terms

Successor – A successor course is the best course to a remote system. A successor course is utilized by EIGRP to advance traffic to a goal and is put away in the directing table. It is upheld up by an successor course that is put away in the topology table–on the off chance that one is accessible.

Plausible successor – A possible successor is a way whose announced separation is not exactly the separation. EIGRP is going to keep up to six plausible successors in the topology table. Just the one with the best measurement (the successor) is duplicated and put in the directing table.

EIGRP Tables

  1. Neighbor table:The neighbor table contains data about switches with whom neighbourship connections have been shaped. The “show ip eigrp neighbors” order records the data about neighbor routers.
  2. Topology table:The topology table stores all ways to goals systems learnt by the EIGRP neighbor switches. The “show ip eigrp topology” order shows the EIGRP topology table. P: Passive: Means the switch isn’t searching for the course effectively. The status of ‘A – Active’ signifies the switch is effectively attempting to discover a course for the goal, if the successor falls flat.

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