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8/3/2019 03-Basic Eigrp v0.1
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Implementing Cisco IP Routing - ROUTEExam: 642-902
Basic EIGRP
8/3/2019 03-Basic Eigrp v0.1
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Intro
EIGRP Introduced/Reviewed
EIGRP Feature
EIGRP Terminology
EIGRP Tables
Configuring Basic EIGRP Network
Enabling EIGRP
Verifying EIGRP Speeding Convergence
Controlling Neighborship
Passive Interfaces
EIGRP Authentication
Static Neighbor
Tweaking EIGRP Metric Calculations (Changing K Values or BW)
EIGRP Different WAN Options
EIGRP Equal and Unequal Load Balancing
8/3/2019 03-Basic Eigrp v0.1
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EIGRP Introduced/Reviewed
EIGRP Feature
Cisco Proprietary IGP, Supports VLSM, Very Fast Convergence
Uses 224.0.0.10, IP Protocol ID 88, Reliable Transport Protocol (RTP),
Support both manual & automatic route summarization, multiple layer 3 protocols
EIGRP Tables
Neighbor Table
Topology Table
Routing Table
EIGRP Messages
Hello
Update Query
Reply
ACK
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EIGRP Terminology
Successor & Feasible successor
Feasible Distance & Advertised
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Configuring Basic EIGRP Network
Enabling EIGRProuter eigrp 1
network 192.168.0.0 0.0.255.255
network 172.16.1.1 0.0.0.0
Verifyingshow ip protocol
show ip eigrp neighbor
show ip route eigrp
show ip eigrp topology
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Speeding EIGRP Convergence
Configuring hello and hold timersinterface Serial0/1
ip hello-interval eigrp 1 2
ip hold-time eigrp 1 6
Note: routers use other routers hello an hol timers
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Controlling Neighborship
Passive Interfaces What will it do?
router eigrp 1
Passive-interface fa0/0
Static Neighbor
What will it do?
router eigrp 1
Neighbor 150.1.12.2
EIGRP Authentication
Key Chain:
Keys
Key string (password)
Sending lifetime
Receiving lifetime
Associating key chain to interface with EGIRP process
Logic behind authentication
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EIGRP Authentication Example
Configuration Verification
Troubleshooting
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Tweaking EIGRP Metric Calculations
EIGRP Metric Calculation
256*([K1*Bw + K2*Bw/(256-Load) + K3*Delay]*[K5/(Reliability + K4)])
Changing K Values
By default K1=K3=1 and K2=K4=K5=0
Metric= 256*(Bw + Delay)
Bw = (10^7/minimum Bw in kilobits per second)
R1(config-router)# metric-weights 0
Changing BWR1(config-if)#bandwidth kbps
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EIGRP WAN Options
Frame Relay Multipoint Interfacesinterface s0/1
no ip split-horizon eigrp 1
EIGRP bandwidth utilization
(up to 50% by default)
interface s0/1ip bandwidth-percent eigrp 1 20
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Equal and Unequal Load Balancing
Equal cost load balancing on up to 4 paths by default maximum-path 6
Unequal paths variance #
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Summary
EIGRP Introduced/Reviewed
EIGRP Feature
EIGRP Terminology
EIGRP Tables
Configuring Basic EIGRP Network
Enabling EIGRP
Verifying EIGRP
Speeding Convergence
Controlling Neighborship
Passive Interfaces
EIGRP Authentication
Static Neighbor
Tweaking EIGRP Metric Calculations (Changing K Values or BW)
EIGRP Different WAN Options
EIGRP Equal and Unequal Load Balancing
8/3/2019 03-Basic Eigrp v0.1
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