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How to advertise non-connected EIGRP routes

Posted on 2009-07-16
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Last Modified: 2012-05-07
Hi,

Simple set up...2 sites, A & B....they talk via a wireless link which fails over to a backup wireless link when it's down.  I have being doing some network re-designing and I want to know how to advertise the networks beyond each sides router...see diagram

Site A - Router A is the EIGRP router I am working on
Networks I want to advertise to site B - 172.16.0.0 /20   10.10.20.0 /30    192.168.4.0 /24 (DMZ - not in pic)

Site B - Router B is the EIGRP router I am working on
Networks I want to advertise to site A - 192.168.5.0 /24   10.10.40.0 /30    192.168.3.0 /24 (DMZ - not in pic)

When the primary wireless goes down I want to failover to the backup

Any idea how to configure the EIGRP here?

Thanks

Ally
wireless-EIGRP-solution.jpg
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Question by:ally0000
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8 Comments
 
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Expert Comment

by:Don Johnston
ID: 24868332
The "no auto-summary" is optional.

Site A multilayer switch:
router eigrp 100
 no auto-summary
 network 10.0.0.0
 network 172.16.0.0

Site A router
 router eigrp 100
  no auto-summary
  network 10.0.0.0

Site B router
 router eigrp 100
  no auto-summary
  network 10.0.0.0

Site B multilayer switch:
router eigrp 100
 no auto-summary
 network 10.0.0.0
 network 192.168.5.0

0
 

Author Comment

by:ally0000
ID: 24868514
Thanks for the reply. Surely the 10.0.0.0 without auto summary would cover my /30 networks at both sites? Do I really need to introduce EIGRP on the other routers? Can I not just somehow advertise these networks on just the routers controlling the wireless?

Thanks
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Accepted Solution

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Don Johnston earned 500 total points
ID: 24870137
>Thanks for the reply. Surely the 10.0.0.0 without auto summary would cover my /30 networks at both sites?

The no auto-summary was for the 172.16.0.0/20 network. And like I said, it's optional.

>Can I not just somehow advertise these networks on just the routers controlling the wireless?

The multilayer switches need to have the other site's networks in their routing tables. You could create static routes for all of the devices but I thought you wanted to run EIGRP.

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Author Comment

by:ally0000
ID: 24871348
Hi,

I have static routes on all the network devices but I would like router A in site A (the one controlling the wireless link) to advertise 172.16.0.0 /20, 10.10.20.0 /30 and192.168.4.0 /24 but as they are not directly connected then they are not advertised. What about adding a loopback interface for each subnet?
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Expert Comment

by:Don Johnston
ID: 24873284
>I have static routes on all the network devices

Then why do you need to advertise anything? If you've got static routes to all the destinations, what else is there?
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Author Comment

by:ally0000
ID: 24873499
I thought it would be better for eigrp to handle all the routing, seeing as it's there.

If you don't think it's a big deal then I'll just leave it

Thanks

Ally
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Expert Comment

by:Don Johnston
ID: 24873566
I think you're missing my point (or I'm missing yours).

If you've got static routes defined for all networks on all layer 3 devices, then you don't need EIGRP.

If you're running EIGRP on all layer 3 devices then you don't need static routes.
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Author Comment

by:ally0000
ID: 24873599
OK, I guess I'm just seeing if what I am doing is OK....thanks for replying

Ally
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