EIGRP - SIA Process and RTP retry attempts

EIGRP - Viewing RTP in Wireshark

Reliable Transport Protocol


The [EIGRP](/eigrp) protocol uses [Reliable Transport Protocol](/reliable-transport-protocol) (RTP) to exchange [update and other EIGRP messages](/eigrp-update-message-exchange-process).  RTP is a reliable protocol, and requires that messages sent are acknowledged using RTP’s reliability mechanisms.

RTP may attempt up to 16 retries when EIGRP messages are unacknowledged.  In fact, this retry mechanism operates at the [Transport layer](/osi-model) (i.e. within the RTP protocol itself).

The retries that are attempted by an EIGRP router using RTP will typically take place based on the retransmission timeout (RTO) used by RTP, which is dynamically calculated based on network conditions. By default the RTO is set to 200 milliseconds.


EIGRP - RTP's reliable message exchange process

DMVPN State of a tunnel

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Differences between CCIE and CCDE lab exams

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EIGRP - Advertised metric is cumulative

EIGRP - Advertising a route using the network command

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EIGRP - External routes from different ASes

EIGRP - Feasible Successors and the DUAL Algorithm

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EIGRP - Network command syntax

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EIGRP - Reliable Multicast

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EIGRP - Source of values for metric calculation

EIGRP - Static neighbors over any L2 technology

EIGRP - Stub Router

EIGRP - Stub default behavior

EIGRP - Stub router types

EIGRP - Summarization per interface

EIGRP - Understanding Advertised Distance (AD)

EIGRP - Update message exchange process

EIGRP - af-interface configuration mode

EIGRP - how metrics are sent in updates

EIGRP - internal vs external routes

EIGRP - metric computation method

EIGRP - metric equation

EIGRP - named mode name

EIGRP - network command with no wildcard mask

EIGRP - redistribute connected and static routes

EIGRP - shutdown command

EIGRP - stub site function

EIGRP Create and advertise a default route

EIGRP Feasibility condition

EIGRP Header

EIGRP IP bandwidth-percent example

EIGRP Implementation by Non-Cisco Vendors

EIGRP LFA FRR

EIGRP Refining the behavior of load balancing with traffic-share

EIGRP SIA timers

EIGRP Useful Debug Commands

EIGRP authentication

EIGRP auto-summary

EIGRP change rib scale

EIGRP establishing remote neighbors

EIGRP header - ACK field

EIGRP named mode

EIGRP on the Nexus Platform

EIGRP redistributing named mode

EIGRP rib-scale

EIGRP seed metrics when redistributing

EIGRP split horizon verification

EIGRP split-horizon vs poison reverse

EIGRP unequal cost load balancing

EIGRP what happens when a feasible successor fails

EIGRP

EPC - Cisco Embedded Packet Capture

ERSPAN

EVE-NG supported Cisco and other vendor images

Equal-cost Multi-path routing

EIGRP - RTP's reliable message exchange process

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