Administrative distance of an EIGRP external route
EIGRP uses ____
algorithm for best path selection
·
Diffusing Update
Algorithm (DUAL)
3 conditions that must
be met for EIGRP routers to become neighbours
·
Hello or ACK received
2. AS (Autonomous System) numbers match
3. Identical metrics (K values)
EIGRP default max hop
count? maximum it can be configured to?
·
100 default, 255 max
What are K Values for
EIGRP and which are used by default?
·
The K values are the
used to compute the metric for EIGRP. They are: bandwidth, delay, Maximum
Transmission unit (MTU), load and reliability. Bandwidth and Delay are used by
default.
When does EIGRP share
it's entire routing table?
·
When it discovers a new
neighbor and forms an adjacency with it through the exchange of hello packets.
Do EIGRP routers in
different ASes share routing information automatically?
·
No
What is Feasible
distance?
·
The best metric along
all paths to a remote network. This includes the distance to the neighbor that
advertised this route. This is the first number in parenthesis in the topology
table before the /.
Which table is the
Feasible successor stored in?
·
The Routing table
What is Reported
Distance or Advertised Distance?
·
The metric of a remote
network as reported by a neighboring EIGRP Router. This is the second number in
parenthesis in the topology table after the /.
What is stored in the
Neighbor table?
·
The interface the
neighbor is connected on, the address of the interface, the hold time and
uptime.
What does Hold time
indicate in the neighbor table?
·
How long the router
will wait for a Hello packet to arrive from a specific router.
What does Uptime indicate
in the neighbor table?
·
How long the
neighborship has been established.
What does the Topology
table contain?
·
It contains all
destinations advertised by neighboring routers, the destination addresses and
the list of neighbors that advertised the destination.
Where are the
neighbor, topology and routing tables stored?
·
RAM
What three tables does
EIGRP create, maintain and use?
·
Neighbor table,
Topology Table and Routing Table
What is the best route
called that is placed in the routing table and used to forward traffic?
·
Successor route
A path whose reported
distance is less than the feasible distance and is considered a backup route.
·
Feasible successor
Where are the feasible
successor routes stored?
·
The Topology table
How many feasible
successor routes will EIGRP store in the topology table?
·
6
What command will show
the eigrp topology table
·
show ip eigrp topology
What address does
EIGRP send multicast traffic to?
·
224.0.0.10
The protocol used to
manage communication between EIGRP routers
·
Reliable Transport
Protocol (RTP)
EIGRP uses ___ to
identify the collection of routers that share router information.
·
AS numbers
The use of a routing
protocol to advertise routes that are learned by some other means such as
another routing protocol, static or connected routes are called _____.
·
Redistribution
What is the default
administrative distance of an EIGRP intenal route?
·
90
What is the default
administrative distance of an EIGRP external route?
·
170
What does EIGRP do at
a networks classful boundary to help reduce the size of routing tables?
·
auto summarizes it
What command is used
to disable the auto summarization process?
·
R1(config-router)#no
auto-summary
What table records
information about routers with whom adjacencies have been formed?
·
neighborship table
What table stores the
routes that are currently used make routing decisions?
·
routing table
What table stores the
route advertisements about every route in the internetwork received from every
neighbor?
·
topology table
How many pathes can
EIGRP provide unequal cost load balancing for by default? Max number?
·
4 by default, 6
maximum
What command is used
to configure EIGRP to load balance up to 6 links?
·
R1(config-router)#maximum-paths
6
Command used to setup
EIGRP on a router in AS 20
·
R1(config)#router
eigrp 20
Command to add network
10.0.0.0 for EIGRP to advertise
·
R1(config-router)#network
10.0.0.0
To stop an interface
from receiving EIGRP hello packets which will stop it from forming adjacencies
what do you set the interface as?
·
Passive interface
command to set serial
0/1 to passive
·
R1(config-router)#passive-interface
serial 0/1
What is the difference
between setting an interface to passive in EIGRP than RIP?
·
In EIGRP the interface
will no longer send or receive route updates. In RIP the interface will no
longer send updates but will still receive them.
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