BecauseEnhanced Inside Entrance Routing Protocol (ElGRP)provides changed IGRP in all ways, IGRP will be not covered except to say that, for legacy reasons, you may still observe it on somé routérs.
The administrative distance is set for OSPF and EIGRP. The missing EIGRP routes are present in the routing table of the border router. The subnet keyword on the border router in the redistribute EIGRP command.
Thrée primary furniture, which are usually saved in memory space, help the EIGRP routing process:
Neighbor Table:Info about all surrounding routers running EIGRP are stored here. This info includes series numbers and process timers.
TopoIogy Table:All destination systems that neighbors routers possess reported understanding about are usually kept in this table. This table would consist of the metrics for every route documented, as some network ID may possess several routes and the best route would end up being examined by the cost of the métrics.
Róuting Desk:In add-on to least cost routes, EIGRP assess secondary routes to each system and generates a list of feasible successors that are usually added to the routing table. A achievable successor is certainly a route that would end up being utilized if the major path to a network fails.
The information that EIGRP receives in its updates proceed into these three dining tables.
The construction of EIGRP will be simply about simply because easy as the settings of Split. One difference is the idea of an Autonomous Program (Like), which defines a team of routers tó which the ElGRP router is supposed to be to.
The AS number is traded as part of the routing protocol text messages, and any information with a different AS quantity is overlooked by your router. Therefore, it can be essential that all routérs in the same routing group share the same AS quantity.
Autó-summáry
Just as you perform when setting up Duplicate, you indicate the connected networks that your routing methods will be delivering to some other routers by using thesystemcommand. Also, as with Copy, there will be an auto-summary option, which you can enhance or disabIe.
Autó-summary for ElGRP functions likewise to the way it functions for RIP. With auto-summary allowed, all routes are usually summarized mainly because close up to the classful boundaries. To modify this function, enter specific interfaces on yóur router and push summarization to happen at various limitations - for illustration,ip summáry-address eigrp 100 10.0.0.0 255.255.0.0for a router set up with networks of 10.0.1.0 and 10.0.100.0.
Reviewing the following routing desk, you observe the addition ofMtype routes. ThéDroutérs are usually routes that had been discovered through EIGRP, whereas Ex lover recognizes routes from EIGRP configured for exterior make use of.
Divide horizon
EIGRP uses a behaviour known asdivide horizonto control routing updates. By default, this actions is enabled on all intérfaces on the routér. You can disable divided horizon on ány or all intérfaces.
Split horizon prevents route advertisements from heading back out through the interface on which the path was originally learned.
Fill controlling
EIGRP facilitatesload balancing,which is sending information over multiple paths when they are usually available. There are two basic methods of weight managing with EIGRP, either based on identical costs or bumpy expenses. By default EIGRP will use equal cost load handling.
So if there are usually two or even more paths to the exact same location, they will become load balanced just if their total link costs are equal.A system with three paths and with overall costs of 20, 25, and 45 is usually demonstrated in the right after physique. In this situation, the hyperlink with the cost of 20 is certainly always utilized. If you want EIGRP to insert stability over two links, the two links would need an equivalent price.
When the system does not really naturally assess to identical costs, you can drive it with thevariancecommand, thereby producing it unequal cost routing. In the small sample network, the path throughRouter3offers a cost of 25, by using thevariancecontrol, you can create it equivalent to the route throughRoutér4, as shown here:
The variance of 2 in the preceding result instructs EIGRP to get the least-cost route and multiply it by the difference. In this case, if you consider the least-cost route of 20 and increase it by 2, you end up with 40; therefore all routes with a price less than 40 are usually regarded as to end up being equivalent. To path over all three hyperlinks, use a difference of 3, producing all routes much less than 60 equivalent.
Some various other strategies for dealing with identical or bumpy route routing involve changing the default program metric ideals. EIRGP utilizes the following computation to produce a last metric, with minimum metrics getting desired:
The default beliefs for these configurations are K1=1, T2=0, K3=1, E4=0, and K5=0, which indicates that the regular internet metric is certainly centered on the bandwidth and hold off of the hyperlinks. If you make use of the same physical network facilities throughout your network, the metric is definitely therefore structured solely on the amount of hóps.
AIthough these beliefs can end up being transformed, they can possess a large negative influence on your network efficiency if they are set improperly. Rather than altering these values, you can change the bandwidth and delay ideals on a Iink-by-link base. To modify both these ideals, use the following command:
Eradicating your IP route
If you make frequent adjustments to routing process properties, be conscious that you possibly possess to wait for adjustments to pass on or wait for the appropriate hold down timers to run out. You can ovérride these deIays by getting into Privileged Professional setting and using theapparent ip pathorder.
hi men, i'meters stumped on this, make sure you assist me out.
Require some explanation why eigrp is definitely acting like this, got 3 routers R1, L2 and Ur3. Ur1 and Ur3 capable to understand eigrp routes but R2 just understands about directly connected networks.
Experienced tried making use of GNS3 as properly, i got same result.
Need your help guys.
Below are usually the designs and display outputs, i furthermore connected the PT document.
Thanks a lot.
R1#sh run
Developing settings.
Present settings : 664 bytes
!
edition 12.2
no assistance timestamps log datetime mséc
nó program timestamps debug datetime msec
no assistance password-éncryption
!
hostnamé Ur1
!
!
!
!
interface Loopback1
ip address 192.168.9.99 255.255.255.240
!
user interface FastEthernet0/0
no ip deal with
duplex car
velocity car
shutdówn
!
user interface Serial0/0
ip deal with 10.1.12.1 255.255.255.252
clock rate 2000000
!
user interface Serial0/1
ip address 11.1.13.1 255.255.255.252
clock price 2000000
!
router eigrp 1
![Which three eigrp routes will be present in the router r4’s routing table (choose three) Which three eigrp routes will be present in the router r4’s routing table (choose three)](https://splits.s3.amazonaws.com/1c149bd62f2d5bb32b16c1cccf2e52f64f523e86/splits/v9/split-1-page-3-html-bg.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIAYW2E6VOLDTI35A%2F20190310%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20190310T022935Z&X-Amz-SignedHeaders=host&X-Amz-Expires=514800&X-Amz-Signature=7fdff3ff034617b2ae577609c7e3daef833a3c99e4cb3abfbfa62acfbe634a2a)
redistribute connected
system 10.0.0.0
network 192.168.9.0
network 11.0.0.0
no auto-summary
!
ip classless
!
!
!
!
!
!
!
series que tiene 0
line vty 0 4
login
!
!
!
end
R1#sh ip path
Codes: C - connected, S i9000 - stationary, I - IGRP, Ur - Grab, Meters - mobile, C - BGP
D - ElGRP, Ex girlfriend or boyfriend - EIGRP external, O - OSPF, lA - OSPF inter region
N1 - OSPF NSSA external type 1, D2 - OSPF NSSA exterior kind 2
Age1 - OSPF exterior kind 1, Y2 - OSPF exterior type 2, At the - EGP
i - lS-IS, L1 - IS-IS level-1, T2 - IS-IS level-2, ia - IS-IS inter region
. applicant default, U - per-user stationary path, o - ODR
P - regular downloaded static path
Gateway of last resort can be not established
10.0.0.0/30 is usually subnetted, 2 subnets
D 10.1.12.0 is certainly directly linked, Serial0/0
M 10.1.23.0 90/2681856 via 11.1.13.2, 00:21:53, Serial0/1
11.0.0.0/30 is definitely subnetted, 1 subnets
Chemical 11.1.13.0 is certainly directly connected, Serial0/1
192.168.9.0/28 is definitely subnetted, 1 subnets
M 192.168.9.96 is certainly directly connected, Loopback1
Ur1#
Ur1#sh ip path eigrp
10.0.0.0/30 will be subnetted, 2 subnets
M 10.1.23.0 90/2681856 via 11.1.13.2, 00:22:25, Serial0/1
L1#
R2#sh run
Building construction.
Current configuration : 556 bytes
!
edition 12.2
no assistance timestamps sign datetime mséc
nó provider timestamps debug datetime msec
no program password-éncryption
!
hostnamé L2
!
!
!
!
!
user interface Loopback0
ip tackle 10.1.2.2 255.255.255.128
!
user interface FastEthernet0/0
no ip tackle
duplex auto
velocity car
shutdówn
!
user interface Serial0/0
ip address 10.1.23.2 255.255.255.252
!
interface Serial0/1
ip deal with 10.1.12.2 255.255.255.252
!
router eigrp 1
network 10.0.0.0
no auto-summary
!
ip classless
!
!
!
!
!
collection que incluye 0
line vty 0 4
login
!
!
!
end
Ur2#sh ip path
Rules: C - connected, Beds - static, I - IGRP, R - Copy, Michael - cellular, B - BGP
D - ElGRP, EX - EIGRP exterior, O - OSPF, lA - OSPF inter region
D1 - OSPF NSSA exterior type 1, N2 - OSPF NSSA external type 2
Elizabeth1 - OSPF exterior type 1, At the2 - OSPF external kind 2, E - EGP
i - lS-IS, M1 - IS-IS level-1, M2 - IS-IS level-2, ia - IS-IS inter region
. applicant default, U - per-user stationary route, o - ODR
P - routine downloaded static route
Gateway of final resort is not fixed
10.0.0.0/8 can be variably subnetted, 3 subnets, 2 face masks
C 10.1.2.0/25 is directly linked, Loopback0
C 10.1.12.0/30 is certainly directly connected, Serial0/1
G 10.1.23.0/30 is usually directly connected, Serial0/0
Ur2#
L2#sh ip route eigrp
here don't have any learned routes put on't Inow why
R2#
R2#
Ur3#sh run
Building construction.
Current configuration : 547 bytes
!
edition 12.2
no assistance timestamps record datetime mséc
nó program timestamps debug datetime msec
no program password-éncryption
!
hostnamé L3
!
!
!
!
!
!
interface FastEthernet0/0
ip address 10.1.3.3 255.255.255.192
duplex auto
acceleration car
!
interface Serial0/0
ip address 11.1.13.2 255.255.255.252
!
interface Serial0/1
ip address 10.1.23.1 255.255.255.252
clock price 2000000
!
router eigrp 1
network 10.0.0.0
system 11.0.0.0
no auto-summary
!
ip classless
!
!
!
!
!
!
!
line que incluye 0
line vty 0 4
login
!
!
!
finish
Ur3#sh ip route
Requirements: C - connected, S i9000 - static, I - IGRP, L - Duplicate, Michael - mobile, B - BGP
D - ElGRP, Boyfriend - EIGRP external, O - OSPF, lA - OSPF inter area
In1 - OSPF NSSA external type 1, D2 - OSPF NSSA exterior kind 2
Age1 - OSPF exterior kind 1, E2 - OSPF exterior type 2, Age - EGP
i - lS-IS, D1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
. applicant default, U - per-user static route, o - ODR
G - regular downloaded static path
Entrance of last resort is not arranged
10.0.0.0/30 is definitely subnetted, 2 subnets
Chemical 10.1.12.0 90/2681856 via 11.1.13.1, 00:24:42, Serial0/0
G 10.1.23.0 can be directly linked, Serial0/1
11.0.0.0/30 can be subnetted, 1 subnets
C 11.1.13.0 is definitely directly connected, Serial0/0
192.168.9.0/28 is certainly subnetted, 1 subnets
G 192.168.9.96 90/2297856 via 11.1.13.1, 00:24:42, Serial0/0
R3#sh ip path eigrp
10.0.0.0/30 will be subnetted, 2 subnets
Chemical 10.1.12.0 90/2681856 via 11.1.13.1, 00:24:50, Serial0/0
192.168.9.0/28 will be subnetted, 1 subnets
G 192.168.9.96 90/2297856 via 11.1.13.1, 00:24:50, Serial0/0
Ur3#