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2.5.b - EIGRP - Implement and troubleshoot neighbor relation
Cisco-CCIE
17
Computer Networking
Professional
03/14/2017

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Cards

Term
default hello timer on an ethernet interface.
Definition
5 secs
Term
command to amend hello timer on an interface.
Definition
ip hello-interval eigrp
Term
default hold-timer.
Definition
3 x hello
Term
command to amend hold-timer.
Definition
ip hold-time eigrp
Term
describe how the holdtime works in eigrp.
Definition
sent in hello packet. Informs neighbor how long it should wait to receive subsequent hellos.
Term
do the hello and holtime have to match for a neighbor relationship to form?
Definition
no
Term
command to view the holdtime of a neighbor.
Definition
sh ip eig nei
Term
to what address are hello packets sent by default?
Definition
224.0.0.10
Term
what type of packets are used for topology sync between two neighbors?
Definition
unicast
Term
how would you configure a router to send unicast hellos on an interface and suppress multicast hellos?
Definition
define the neighbor under the process on both ends of the link.
Passive-interfaces are not required to suppress multicast hellos in eigrp.
Term
can nieghbors on a multipoint interface use different types of hello packet?
Definition
no
Term
what would a SRTT of 0 for a neighbor indicate?
Definition
that a packet has never made the round trip.
Term
if a packets aren't making the round trip between 2 neighbors, what happens to the RTO.
Definition
it will increase.
Term
what would a sequence number of 0 for a neighbor indicate?
Definition
that no reliable packets have ever been recieved from the neighbor.
Term
command to filter eigrp packets, so they are only received from the desired neighbor.
Definition
debug ip eigrp neighbor 75 192.168.16.19

this is additional to the "debug eigrp packet" command.
Term
what is the retransmission retry limit?
Definition
the amount of times a router will try to send a reliable eigrp packet without receiving a reply.

defualt is 16.
Term
what happens when the retransmission retry limit is reached?
Definition
the neighbor is removed from the neighbor table.
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