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Configuration Sample:

R02(config)#do sh ip protocol

Routing Protocol is "eigrp  22 " 
  Outgoing update filter list for all interfaces is not set 
  Incoming update filter list for all interfaces is not set 
  Default networks flagged in outgoing updates  
  Default networks accepted from incoming updates 
  Redistributing: eigrp 22
  EIGRP-IPv4 Protocol for AS(22)
    Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
    NSF-aware route hold timer is 240
    Router-ID: 192.168.0.109
    Topology : 0 (base)
      Active Timer: 3 min
      Distance: internal 90 external 170
      Maximum path: 4
      Maximum hopcount 100
      Maximum metric variance 1

  Automatic Summarization: disabled
  Automatic address summarization: 
  Maximum path: 4
  Routing for Networks:  
     192.168.0.0
  Routing Information Sources:  
    Gateway         Distance      Last Update 
    192.168.0.110   90            1013492133 
    192.168.0.117   90            1013492136 
  Distance: internal 90 external 170

R02(config)#do sh ip rout
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     192.168.0.0/24 is variably subnetted, 12 subnets, 3 masks
D       192.168.0.16/28 [90/5376] via 192.168.0.110, 03:16:45, GigabitEthernet0/1
D       192.168.0.32/28 [90/5632] via 192.168.0.117, 03:16:45, GigabitEthernet0/2
D       192.168.0.48/28 [90/5888] via 192.168.0.110, 03:16:45, GigabitEthernet0/1
C       192.168.0.104/29 is directly connected, GigabitEthernet0/1
L       192.168.0.109/32 is directly connected, GigabitEthernet0/1
C       192.168.0.112/29 is directly connected, GigabitEthernet0/2
L       192.168.0.118/32 is directly connected, GigabitEthernet0/2
D       192.168.0.120/29 [90/3072] via 192.168.0.117, 03:16:45, GigabitEthernet0/2
D       192.168.0.128/29 [90/3072] via 192.168.0.110, 03:16:45, GigabitEthernet0/1
D       192.168.0.136/29 [90/3328] via 192.168.0.110, 03:16:45, GigabitEthernet0/1
D       192.168.0.144/29 [90/3584] via 192.168.0.117, 03:16:45, GigabitEthernet0/2
                         [90/3584] via 192.168.0.110, 03:16:45, GigabitEthernet0/1
D       192.168.0.152/29 [90/3328] via 192.168.0.117, 03:16:45, GigabitEthernet0/2

R02(config)#do sh run
Building configuration...

Current configuration : 777 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R02
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX1524PI2Z-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/1
 ip address 192.168.0.109 255.255.255.248
 duplex auto
 speed auto
!
interface GigabitEthernet0/2
 ip address 192.168.0.118 255.255.255.248
 duplex auto
 speed auto
!
interface Vlan1
 no ip address
 shutdown
!
router eigrp 22
 network 192.168.0.0
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

and Here is the Network Topology:

I noticed that in the CBT learning videos, a lot of teachers ignored using the wildcard mask when configuring the EIGRP, however, they always used it when they configured OSPF. I looked on the internet to know why that was, but I could not understand the explanations there. I only knew that it was almost a must to use it in the case of OSPF.

What is the difference?

Update:

More precisely:

What would happen if we ignore configuring the wildcard make in both cases (iegrp, ospf)? .

I noticed that in the CBT learning videos, a lot of teachers ignored using the wildcard mask when configuring the EIGRP, however, they always used it when they configured OSPF. I looked on the internet to know why that was, but I could not understand the explanations there. I only knew that it was almost a must to use it in the case of OSPF.

What is the difference?

Update:

More precisely:

*What would happen if we ignore configuring the wildcard make in both cases (iegrp, ospf)?

EIGRP Packet Trace Routing Lab Example.

I noticed that in the CBT learning videos, a lot of teachers ignored using the wildcard mask when configuring the EIGRP, however, they always used it when they configured OSPF. I looked on the internet to know why that was, but I could not understand the explanations there. I only knew that it was almost a must to use it in the case of OSPF.

What is the difference?

Update:

More accurately:

What would happen if we ignore configuring the wildcard make in both cases (iegrp, ospf)? .

I noticed that in the CBT learning videos, a lot of teachers ignored using the wildcard mask when configuring the EIGRP, however, they always used it when they configured OSPF. I looked on the internet to know why that was, but I could not understand the explanations there. I only knew that it was almost a must to use it in the case of OSPF.

What is the difference?

Update:

More precisely:

What would happen if we ignore configuring the wildcard make in both cases (iegrp, ospf)? .