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EIGRP Named Mode

                                                 EIGRP Named-Mode                                                

 

EIGRP Has 2 modes

1.     EIGRP Classic Mode //we use an Autonomous number to run

2.     EIGRP Named Mode //we use any Name to run

EIGRP Named Mode has multiple Features:

Ø It supports 64-bit metric Calculation

Ø It measures Delay in Pico Second

Ø It has multiple subaddress families to work

Ø To work for interface no need to go in global mode, under Router EIGRP named mode we can do interface based changes related to EIGRP

Ø Authentication also we can also apply under router EIGRP process

Ø EIGRP Named Mode support Fast re-route feature

Ø Under EIGRP Named mode we need to define Autonomous number

 

So let’s do some practice and we will also see what commands we run in Classic mode and what we have in the named mode for the same

 

Run EIGRP & Inject Few interfaces

Classic Mode

Named Mode

Ø Router eigrp 10

Ø Network 10.0.0.0

Ø Network 192.168.0.0 255.255.0.0

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø network 10.0.0.0

Ø network 192.168.0.0 255.255.0.0

Ø exit

 

Change Timers of EIGRP on interface F2/0

Classic Mode

Named Mode

Ø interface fastEthernet 2/0

Ø ip hello-interval eigrp 10 5

Ø ip hold-time eigrp 10 15

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø af-interface fastEthernet 2/0

Ø hello-interval 5

Ø hold-time 15

Ø exit

 

MD5 Authentication on interface F2/0

Classic Mode

Named Mode

Ø key chain CCIE

Ø key 1

Ø key-string CCIE

Ø exit

Ø interface fastEthernet 2/0

Ø ip authentication mode eigrp 10 md5

Ø ip authentication key-chain eigrp 10 CCIE

Ø exit

Ø key chain CCIE

Ø key 1

Ø key-string CCIE

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø af-interface fastEthernet 2/0

Ø authentication mode md5

Ø authentication key-chain CCIE

Ø exit

 

Hmac-SHA Authentication on interface F2/0

Classic Mode

Named Mode

Ø does not support

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø af-interface fastEthernet 2/0

Ø authentication mode hmac-sha-256 CCIE

Ø exit

 

Passive interface feature

Classic Mode

Named Mode

Ø router eigrp 10

Ø passive-interface fastEthernet 2/0

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø af-interface fastEthernet 2/0

Ø passive-interface

Ø no split-horizon

Ø exit

 

Split-Horizon Feature

Classic Mode

Named Mode

Ø interface fastEthernet 2/0

Ø no ip split-horizon eigrp 10

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø af-interface fastEthernet 2/0

Ø no split-horizon

Ø exit

 

 

Stub Feature

Classic Mode

Named Mode

Ø Router eigrp 10

Ø Network 10.0.0.0

Ø Network 192.168.0.0 255.255.0.0

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø eigrp stub

Ø exit

 

Change AD values for internal routes and external routes

Classic Mode

Named Mode

Ø router eigrp 10

Ø distance eigrp 90 170

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø distance eigrp 90 170

Ø exit

 

 

Filtering of prefixes using Distribute-List

Classic Mode

Named Mode

Ø router eigrp 10

Ø distribute-list route-map new in fastEthernet 2/0

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø   distribute-list route-map new in fastEthernet 2/0

Ø   exit

 

 

Change Maximum Path for best routes

Classic Mode

Named Mode

Ø router eigrp 10

Ø maximum-paths 4

Ø exit

Ø router eigrp CCIE

Ø topology base

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø maximum-paths 4

Ø exit

 

 

Control from how many hops you want to receive the update

Classic Mode

Named Mode

Ø router eigrp 10

Ø metric maximum-hops 10

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø metric maximum-hops 10

Ø exit

 

Equal cost load-Balancing feature

Classic Mode

Named Mode

Ø router eigrp 10

Ø offset-list 1 in 3680 f2/0

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø offset-list 1 in 3680 f2/0

Ø exit

 

 

Unequal-Cost Load-Balancing Feature

Classic Mode

Named Mode

Ø router eigrp 10

Ø variance 2

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø variance 2

Ø exit

 

 

Redistribution Process

Classic Mode

Named Mode

Ø Router eigrp 10

Ø redistribute ospf 1 metric 1000 1 255 1 1500

Ø exit

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 10

Ø topology base

Ø redistribute ospf 1 metric 1000 1 255 1 1500

Ø exit

 

 

EIGRP Named Mode has a best Feature Fast Re-route

Using this feature router install the best and backup path in CEF directly and when the best path goes down it never takes time to shift the traffic to another backup link, without this feature whenever the primary link goes down router run DUAL to make the route best and then it starts using new path and this make some delay in traffic forwarding.

EIGRP Classic Mode does not support this feature.

 

So let’s see how we can use Fast Re-route feature

 

So here is the output of CEF before using Fast Re-route feature

Now we will enable this feature for all the routes

Ø router eigrp CCIE

Ø address-family ipv4 autonomous-system 12

Ø topology base

Ø fast-reroute per-prefix all

Ø exit

 

here is the output after enabling the fast-reroute feature. And we can see the attached next-hop also, in case of the primary link fails it will shift traffic instantly to repaired next-hop

 We can also control this behavior, as of now we are enabling for all the prefixes if we want to control this behavior we can use a route-map for selected prefixes instead of using all keywords in the fast-reroute command

 

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