EIGRP - Update message exchange process

EIGRP - Viewing RTP in Wireshark


[EIGRP](/eigrp) uses the Cisco proprietary [Reliable Transport Protocol](/reliable-transport-protocol) or RTP for communication between EIGRP routers.  This protocol has as part of its operation, a mechanism known as reliable multicast.

EIGRP will send its [update message](/eigrp-update-message-exchange-process) initially using [Multicast](/multicast).  If the EIGRP router doesn't get a reply from a neighbor via the multicast, it then uses [unicasts](/unicast-traffic) to resend the same data. **If it does not get a reply from the neighbor after 16 unicast attempts, it declares the router dead**. This process is known as reliable multicast.


EIGRP - Reliable Multicast

DMVPN dual hub dual cloud

DMVPN dual hub single cloud

DMVPN hierarchical topology

DMVPN redundancy options

DMVPN with more than two hubs

DMVPN

DNS - Authoritative Flag

DNS - Authoritative Server

DNS - Caching

DNS - Recursive Resolver

DNS - What is a delegation zone

DNS - stub zone

DNS - understanding zones

DNS cache windows PC

DSL - Asymmetric Digital Subscriber Line (ADSL)

DTP - Sending of Frames

DTP - best practice to disable

DTP - how to disable

Debug Condition Command Restrictions in Cisco IOS

Debug IP Routing

Decrypt IPSec ESP traffic with Wireshark

Demand Circuits

Demarcation point

Difference between per-prefix LFA and per-link based LFA

Differences between CCIE and CCDE lab exams

Diffserv recommended configuration

Distribute-lists - using route maps to set attributes

Distribute-lists and named extended ACLs

ECMP Multicast Routing Cisco Nexus Switches

EEM - action mail

EEM - exit status variable

EEM Cisco Embedded Event Manager

EEM Matching a string within CLI output

EEM sync and skip keywords

EIGRP - Advertised metric is cumulative

EIGRP - Advertising a route using the network command

EIGRP - DUAL Algorithm and FD Set to Infinity

EIGRP - External routes from different ASes

EIGRP - Feasible Successors and the DUAL Algorithm

EIGRP - Hello interval and Hold time

EIGRP - Hop Count

EIGRP - Message TTL value of 2

EIGRP - Metric Equation Multipliers

EIGRP - Network command syntax

EIGRP - Queries

EIGRP - RTP's reliable message exchange process

EIGRP - Router ID and loop prevention

EIGRP - SIA Process and RTP retry attempts

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 - 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

EtherChannel - Converting an L2 EtherChannel to L3

EIGRP - Reliable Multicast

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