Chapter 5 - EIGRP
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34 Terms
What does EIGRP stand for?
Enhanced Interior Gateway Routing Protocol
what type of networks is EIGRP commonly found in?
Enterprise Networks
What algorithm does EIGRP use ?
DUAL
What is an AS Number?
an EIGRP domain where all processes and metric calculations etc work under the same AS number
Explain the successor route?
The route with the lowest path metric to reach a destination
Explain the successor?
The first next-hop router for the successor route
Explain the Feasible Distance (FD)
The total cost of the path to reach a destination
Explain the Reportef Distance (RD)
s the metric advertised by a neighboring router for a specific route. It represents the cost of the path from the neighbor to the destination, as determined by the neighbor itself.
Explain the feasibility condition?
The condition which considers the FS - the RD must be less than the FD
Explain the Feasible successor?
This is the backup route
What is the EIGRP topology table?
A component of DUAL which contains information to identify loop-free backup routes.
Does EIGRP rely on periodic advertisements ?
No they do not instead neighbours exchange the entire routing table in the formation process and only advertise updates as the topology changes
What is the neighbour adjacency table?
A table which tracks neighbour status and the updates sent to each neighbour
What protocol does EIGRP use?
88
What is the multicast address EIGRP uses?
224.0.0.10
Why does EIGRP use multicast to deliver packets?
To reduce bandwidth consumption
Explain the EIGRP packet types?
Hello - used for discovery of neighbours
Request - used to request information from neighbours
Update - Used to transmit routing information with other neighbours
Query - sent out to search for another path for convergance
Reply - sent in response to a query packet
Name the 2 methods of EIGRP configuration
Classic and Named
What is the problem with Classic config?
More complexity in the configuration as some settings have to be set individually under the interface.
How does Named Mode overcome some of the config difficulties?
All the EIGRP config occur under 1 location
Commands are clear
Can run multiple instances under the same EIGRP process
What command verifies EIGRP neighbour adjancies?
show ip eigrp neighbours
What are routes that originate from outside the AS called?
External EIGRP routes
What is the router-id?
32-bit number that uniquely identifies an EIGRP router
What does an EIGRP passive interface do?
prevents an EIGRP interface from sending out hello packets, preventing it from formaing neighbouring adjancies
What are the K values?
Values used to define which factors the metric formula uses
What is the default metrics for delay in FE?
100 us
What is the default metrics for delay in GE?
10 us
What is the default metrics for delay in Serial?
20,000 us
What is the default metrics for link speed in FE?
100,000 Kbps
What is the default metrics for link speed in GE?
1,000,000 Kbps
What are Wide Metrics?
support for a second set of metrics to address issue of scalability.
Additional attributes such as jtter etc
does classic mode support wide metrics?
No they do not only named mode supports wide metrics
Note 
Flashcards (21)