Passive Interface and Stuck in Active concepts in EIGRP

Stuck in Active:

When a router lost any one route (route went down) then it will start query about that down route to the neighbor routers. And the neighbor router will send query to next and so on until they get reply about that route. During this mean time all routers went too stuck in active mode.

STUB Router is used to eliminate this stuck in active problem. Stub router won’t receive query, reply to query etc.

#router eigrp 100

#eigrp stub

NOTE:

Ø  Stub router won’t send the redistributed routes from any router to other

# eigrp stub redistribute                     (won’t work)

Enhanced Interior Gateway Routing Protocol

EIGRP (Enhanced Interior Gateway Routing Protocol) it is derived from IGRP

IGRP is a Distance vector routing protocol.

·         EIGRP is a Hybrid (or) Advance distance vector routing protocol

·         The AD value of EIGRP is

·         90     (EIGRP-INTERNAL),

·          170     (EIGRP-EXTERNAL)

·         Protocol  number is 88

·         It works on RTP (Reliable transport protocol)

·         It is fast convergence

·         It works as class full/ classless (no auto summary)

·         It works on AS number  (Autonomous system)  {in order to form neighbor ship the AS number should match}

·         Fast convergence

·         100% loop Free

Basics of Networking

What is Network:

It is a group of connected devices to share data, information and to communicate with each other.

What is Networking:

            The process of configuring networking devices to make a network for communication is called networking.

Networking devices are 

• Hub
• Bridge
• Switch and
• Router...etc