04-advanced eigrp v0.1

8/3/2019 04-Advanced EIGRP v0.1

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The Implementing Cisco IP Routing -ROUTEExam: 642-902

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Advanced EIGRPRouting Table and Performance Optimization


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Make It Easiest.com... Would you? [email protected]

Intro

OptimizationGoing ActiveStub RoutersStuck in Active

Route Filtering:D istribute lists using ACL, IP Prefix Lists and Route MapsOffset ListsAdministrative D istance Modification

Route SummarizationAuto SummarizationManual Summarization

D efault Routing


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Op timization

Going Active


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Stub Routers

Wh at is an EIGRP Stub Router? Configuring a stub route

router eigrp 1eigrp stub

Stub router options:connectedsummarystaticredistributedreceive-only


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Stuck in Active ( SIA)

Problem and solutionIn big networks it may take time to respondAdjusting active limit using timers active-time minutes

Older IOS broug h t down unresponsive neig h borsN ewer IOS (beginning 12.2)send SIA-Query to get SIA-Reply


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Route Filtering

D istribute lists using ACL, IP Prefix Lists and Route MapsRoute filtering verses packet filteringUsing ACL

access-list 1 permit 170.50.1.0 0.0.0.255access-list 1 permit 170.50.2.0 0.0.0.255

Or

access-list 1 permit 170.50.0.0 0.0.3.255

D istribute list configurationrouter eigrp 1distribute-list 1 out [s0/0]

170.50.1.0/24170.50.2.0/24170.50.3.0/24


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IP Prefix Lists

Met h od to matc h prefix(es)ip prefix-list Prefix_170 permit 170.50.0.0/16

le ip prefix-list Prefix_170 permit 170.50.0.0/16 le 24ge ip prefix-list Prefix_170 permit 170.50.0.0/16 ge 24le and ge ip prefix-list Prefix_170 permit 170.50.0.0/16 le 16 ge 16

D istribute list configurationrouter eigrp 1distribute-list prefix Prefix_170 out


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Route Ma p s Like programming script

route-map ROUTE permit 10match ip addressmatch lengthmatch metric

route-map ROUTE permit 20

match ip addressset next

D istribute Lists wit h Route Mapsroute-map ROUTE permit 10match ip address 1

route-map ROUTE deny 20

router eigrp 1distribute-list ROUTE out

170.50.1.0/24170.50.2.0/24170.50.3.0/24


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O ffset Lists

Adding some metric to prefix

route eigrp 1offset-list 0 in 1001 s0/0.13


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Administrative Distance Modification

preferring one routing source over anot h er

router eigrp 1distance 255 192.168.102.2 0.0.0.0distance eigrp 100 100


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Route Summarization Auto Summarization:

Contiguous N etworks

D iscontiguous N etworks

Manual SummarizationComputing Summary/Aggregate

170.50.1.0 170.50 . 0000 00 01 . 0000 0000170.50.2.0 170.50 . 0000 00 10 . 0000 0000170.50.3.0 170.50 . 0000 00 11 . 0000 0000

170.50 . 0000 00 00 . 0000 0000

Configuring Summaryinterface fa0/0

ip summary-address eigrp 1 170.50.0.0 255.255.252.0

R1 R2 R3

R1 R2 R3

170.50.1.0/24 170.50.12.0/24 170.50.23.0/24 170.50.3.0/24

170.50.1.0/24 192.50.12.0/24 192.50.23.0/24 170.50.3.0/24


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Default Routing

Injecting D efault Routeusing network 0.0.0.0 command wit h static default route on edge router

ip route 0.0.0.0 0.0.0.0 loopback1router eigrp 1network 0.0.0.0

Or using route redistribution

Using ip default-networkR2 or R3

router eigrp 1ip default-network 192.168.1.0

170.50.1.0/24170.50.2.0/24170.50.3.0/24


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Summary

OptimizationGoing ActiveStub RoutersStuck in Active

Route Filtering:D istribute lists using ACL, IP Prefix Lists and Route MapsOffset ListsAdministrative D istance Modification

Route Summarization

Auto SummarizationManual Summarization

D efault Routing


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04-advanced eigrp v0.1

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