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10
Helpful
4
Replies

OSPF Help - no ping connectivity between routers/PCs

BlobBalls75605
Level 1
Level 1

New Bitmap Image (45).jpg

So I tried to configure OSPF for the routers but still there is no connectivity. Here are the configurations:

 

R1
en
config t
int f0/0
ip add 100.100.10.1 255.255.255.0
no shutdown
exit
int s0/1
ip add 10.10.10.49 255.255.255.252
clock rate 64000
no shutdown
exit
router ospf 1
network 100.10.10.0 0.0.0.255 area 1
network 10.10.10.48 0.0.0.3 area 0
exit
exit
copy run start

 

R2
en
config t
int f0/0
ip add 100.100.20.1 255.255.255.0
no shutdown
exit
int s0/1
ip add 20.20.20.53 255.255.255.252
clock rate 64000
no shutdown
exit
int s0/0
ip add 10.10.10.50 255.255.255.252
no shutdown
exit
router ospf 1
network 100.10.20.0 0.0.0.255 area 0
network 10.10.10.48 0.0.0.3 area 0
network 20.20.20.52 0.0.0.3 area 0
exit
exit
copy run start


R3
en
config t
int f0/0
ip add 40.40.40.61 255.255.255.252
no shutdown
exit
int s0/1
ip add 30.30.30.57 255.255.255.252
clock rate 64000
no shutdown
exit
int s0/0
ip add 20.20.20.54 255.255.255.252
no shutdown
exit
router ospf 1
network 20.20.20.52 0.0.0.3 area 0
network 40.40.40.60 0.0.0.3 area 3
network 30.30.30.56 0.0.0.3 area 2
exit
exit
copy run start

 


R4
en
config t
int f0/0
ip add 100.100.40.1 255.255.255.0
no shutdown
exit
int s0/0
ip add 30.30.30.58 255.255.255.252
no shutdown
exit
router ospf 1
network 100.100.40.0 0.0.0.255 area 2
network 30.30.30.56 0.0.0.3 area 2
exit
exit
copy run start


R5
en
config t
int f0/0
ip add 100.100.30.1 255.255.255.0
no shutdown
exit
int f1/1
ip add 40.40.40.62 255.255.255.252
no shutdown
exit
router ospf 1
network 100.100.30.0 0.0.0.255 area 3
network 40.40.40.60 0.0.0.3 area 3
exit
exit
copy run start

 

 

2 Accepted Solutions

Accepted Solutions

Martin L
VIP
VIP

not sure if PT supports OSPF muit-areas, does it? better check !

View solution in original post

Its because you have advertised incorrect network on R1 and R2 for PC1 and PC2

You have 100.100.10.0/24 and 100.100.20./24 but you advertised 100.10.10.0/24 and 100.10.20.0/24

 

Router(config)#do sh run | s os
hostname Router
router ospf 1
 log-adjacency-changes
 network 100.10.20.0 0.0.0.255 area 0
 network 10.10.10.48 0.0.0.3 area 0
 network 20.20.20.52 0.0.0.3 area 0
Router(config)#

Advertised the correct networks and the ping between PC1 and PC2 works 

Screenshot 2020-04-26 at 12.35.09.png

 

View solution in original post

4 Replies 4

Martin L
VIP
VIP

not sure if PT supports OSPF muit-areas, does it? better check !

omz
VIP Alumni
VIP Alumni

it looks to be working .. 

what is source and destination of ping?

Screenshot 2020-04-26 at 01.29.53.png

The connectivity between R1 and R2 is not patched somehow.

 

Thanks for the help in advance.

Its because you have advertised incorrect network on R1 and R2 for PC1 and PC2

You have 100.100.10.0/24 and 100.100.20./24 but you advertised 100.10.10.0/24 and 100.10.20.0/24

 

Router(config)#do sh run | s os
hostname Router
router ospf 1
 log-adjacency-changes
 network 100.10.20.0 0.0.0.255 area 0
 network 10.10.10.48 0.0.0.3 area 0
 network 20.20.20.52 0.0.0.3 area 0
Router(config)#

Advertised the correct networks and the ping between PC1 and PC2 works 

Screenshot 2020-04-26 at 12.35.09.png