New task with /30 and/23

[NetworkDave]

Mahdi,

The previous problems were attached to multiple already closed/Solved threads and have been fixed. This is a new issue, therefore a new conversation should be started. Since you seem unable to start one yourself, I have done it for you. The new conversation is titled "New task with /30 and/23".

From:

@mahdi benameur 10-20-2022 10:58 AM

hi dave ,

i got a new task where three router ospf with /30 all ip begin with 10.x., between them should communicate where the first three octet are 10.5.6.x in all router connected

and pc 1 : vlan 1 ip address 192.168.1.x/24

pc2 :vlan 2 ip address 192.168.2.x/24

pc3 :192.168.6.x/23 netmasker vlan 3 are connecting to switch 1 which should be connected to router 1 using 802.1 q

from router 2 other side is connected to switch 2 ( pc 4 :vlan 1 ip address 172.16.0.x /23, and pc 7:vlan 2 )

switch 2 should with port-channel, connected to switch 3 which is the last connected to pc5 vlan 2 ip adress 172.16.4.x/23

and more pc6 (/24)to switch 3 connected .

connected to router 3 from the other side there is switch 4 connected with 802.1 q to router 3.

switch 4 is connected to switch 6 and switch 5 using stp

now is the issue from switch 5 to switch 6 which are both are connected using stp .vlan 10 should be blocked here between switch 5 and 6.

ok i have pc 10 /24 subnet conected to switch 5 and pc 9 connected to switch 6

and pc 8 should connected to switch 4

i need your help urgently before tommorow morning

i appreciate any help

you sinceley

mahdi

@mahdi benameur 10-20-2022 11:31 AM

by the way i forget to write the vlan 10ip : 10.0.0.x/24

in the explanation task

@mahdi benameur 10-21-2022 08:01 AM

i have a three routers whereas two router able to see each other in ospf mode while the third are not able to see.

all of them are in /30

----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.

[NetworkDave]

Mahdi,

Send the zipped packet tracer file. What troubleshooting have you done to determine the cause of the OSPF issue?

----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.

[mahdi benameur]

DAVE

THE TROUBLESHOOTING I HAVE DONE IT IS SHOW COMMANDS  SHOW IP OSPF NEIGBOR  SHOW IP ROUTE BUT I GOT AN EMPTY OUTPUT IN THE ROUTER 3 , I HAVE SEND YOU THE PACKETTRACER IN YOUR PRIVATE EMAIL WITH INSTRUCTIONS .

[mahdi benameur]

dave

i have send it to you in your private email the instructions writing in notepad and packet tracer machine i hope you have seen it

this time i have made all good ip addresses into its good place except the problem of the three router ospf adjacency with each other 

thanks in advance

your sincely mahdi 

[mahdi benameur]

i send you also the instructions of the new task which are very clear 

[mahdi benameur]

Dave

Have you found the issue on ospf routers 

I appreciate your help 

Mahdi

[David Ruess]

Hello,

If you attached the zipped packet tracer file to your issue here other people could look at it and help out instead of waiting on one person. 

-David

[NetworkDave]

Mahdi,

The OSPF network statement wildcard mask for 10.5.6.0 is incorrect. It needs to be changed from 0.0.0.3 to 0.0.0.15 for all three routers (R1/R2/R3).

Take a read of the helpful post by @David Ruess. Follow his tip and allow the community to help you.

----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.

[mahdi benameur]

Thanks ,and how about the wild card of the ip address connected to the three routers (which are at the same time direct connected to the PC and switches,  i mean should I change another things or just the routers wild card you sent to me ?

Mahdi

[NetworkDave]

Mahdi,

In regards to OSPF on the three routers, change only what I advised. After the change, all three routers should be OSPF neighbors with each other.

----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.

[mahdi benameur]

thanks

now all routers works properly, but when i want to ping from pc 2 above to one of the router but  its not able to ping i get time request

[NetworkDave]

Mahdi,

Now "You" must troubleshoot this problem. Check the Links (are they up/up?). check configurations (Are the IP addresses, masks, gateways, VLANs, sub-interfaces etc. correct?). Can you ping devices locally? Can you ping the network gateway?

----------------------------------------------------------------------------------------------------
Remember to mark helpful posts and mark the correct answer as a solution; It helps other users with similar questions.

[mahdi benameur]

from PC connected to switch 1 , i was not able to ping one of the ospf routers while from the other switches im able to ping

whats is the issue according to you?

[mahdi benameur]

i was not able to ping locally or the default gateway

i willl send you the ,machine 

[mahdi benameur]

dave

from pc 2 and 2 and 11 above left of the diagram , those PC were not able to ping through ospf while i have had configured in router 1.

mahdi