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Beginner

OSPF routing case study

Hello the community,

 

You can find attached the case study topology and routers configurations.

 

For information :

- Site routers are ISR4331

- Dc routers are ASR1001-x router

- These routers can accept by default 16 différents path to join a network and seems to make load sharing between thes path.

 

I have severals questions:

1- On the router R1 and R2 I can annonce the network 10.45.208.0/20 using a "network 10.45.208.0/20 area 0 and passive inerface" or "redistribute connected"

1a - What is the best practise and why ?

1b - If I use redistribut conected the router becomes an ASBR router ?

 

2- What is the role of the back to back links between routers ?

 

3- On the DC Main router interface Fa3 I have ip ospf cost 100. It mean that all the routes learned by this interface will have OSPF cost of 100.

3a - So how can be sure that it will use Site Main router to join the green network (10.1465.0.0/16) ? 

3b - Same question to join the red network (10.45.208.0/20) ?

 

Your brains are welcoms.

 

Thanks in advance

Regards.

4 REPLIES 4
Highlighted
Beginner

Re: OSPF routing case study

Hi,

The PDF file seems not working.

So here is the topology on jpeg format.

 

Regards.

Highlighted
Beginner

Re: OSPF routing case study

Hi the community,

 

Nobody has any idees to help me.

This case study will help me to implement real network architecture. 

 

Regards.

Highlighted
Beginner

Re: OSPF routing case study

Hi,

Is there somone that can tell me if the attached file are readable ?

Thanks

Highlighted
VIP Expert

Re: OSPF routing case study

I can "open/see" both PDF and JPG attachments.
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