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making a topology with cisco and juniper routers

Posted on 2009-07-07
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Last Modified: 2013-11-05
We have 8 routers in total.
6 cisco routers and 2 juniper routers....can anyone suggest a simple possible topology with these given routers to implement BGP, OSPF and MPLS at a time... it would be really helpful for me if you can attach the diagram along with your answer telling me all the OSPF areas, AS and other related parameters?
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Question by:shwaqar82
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15 Comments
 
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Expert Comment

by:bkepford
ID: 24805964
What are the interfaces per router and which interfaces do you have the crossover cables to connect them together.
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Author Comment

by:shwaqar82
ID: 24806026
Thanks a lot for your reply

There are 4 interfaces per router....2 eth and 2 serial
I just need a simple topology so that BGP, OSPF and MPLS can be configured easily in it
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Expert Comment

by:bkepford
ID: 24806097
Any switches? or are your ethernet just crossover?
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Author Comment

by:shwaqar82
ID: 24806144
I have 1 switch with 16 fast ethernet ports
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Expert Comment

by:bkepford
ID: 24806273
Ok you most likey want an MPLS network running BGP over sort of a WAN link and the OSPF as you IGP is this correct? What I would sugest (if you have a router that can take the interfaces) is to build out one of your routers as a MPLS core router with at least 4 serial interfaces. I am not an expert on MPLS so what I say about the MPLS portion is going to be best guesses from my experience with it. I believe you can setup the MPLS network over the frame switch with some VRF statements on the FR switch. again not sure about that. This would then connect 4 routers to simulate four sites with two additional routers to either hang off two sites or a main site. With these two additional routers you can have them dual connected so that you could test to make sure that you can manipulate your OSPF network to except the routes you want them to have or they could be connected seperate and not dual homed to the network . Also how many OSPF areas are you looking for and what types are you looking to emulate.

Let me know if this is what your looking for and what your site preferences are.
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Author Comment

by:shwaqar82
ID: 24806380
You said: "Ok you most likey want an MPLS network running BGP over sort of a WAN link and the OSPF as you IGP is this correct?"
Yes, this is exactly what I want and I didnt really get much what you said afterwards since I am not an MPLS expert either

I am looking for like 2  or 3 areas in OSPF and 2 AS in BGP
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Expert Comment

by:bkepford
ID: 24806695
Let me know if this works for you
Topology.jpg
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Author Comment

by:shwaqar82
ID: 24807067
suppose if I want to swap the AS into OSPF areas and OSPF areas into the AS in your diagram....will that be technically correct? like I want 3 OSPF areas in 1 AS, with 3 other AS connected to it
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Author Comment

by:shwaqar82
ID: 24807079
correction: I meant 4 OSPF areas in 1 AS and 3 other AS connected to it
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Expert Comment

by:bkepford
ID: 24807163
You wouldn't need to run BGP on all your routers just the edge. Is this what you want or are you wanting bgp on all routers?
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Author Comment

by:shwaqar82
ID: 24807334
Actually I was willing to run OSPF inside an AS.....opposite of you have designed....can you redo your design making OSPF areas inside an AS connected with another AS
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Expert Comment

by:bkepford
ID: 24813564
Topology
Topology.jpg
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Expert Comment

by:bkepford
ID: 24813613
hmm didn't come through trying again
Topology.gif
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Author Comment

by:shwaqar82
ID: 24817317
Thanks for your reply
So we can also easliy implement MPLS in it too, right?
Can you shed some light on that please?
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Accepted Solution

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bkepford earned 500 total points
ID: 24817457
As I stated before I am not a MPLS network expert but what I would say is that most people would implement the MPLS network in the WAN core of their network and setup their BGP to advertise the correct prefixes. Possibly do some redistribution back and forth as long as it is only the providers transit IPs and not the Internet routing tables.
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