OSPF Implementation

Answered Question
Feb 10th, 2009
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Hi All,

I have my company network consists of 4 sites. Each one connected to other by Mugs.(Serail - 45 Mbps). In each site the main router in connected to other router which in connected to Firewall & then L3 Switch then L2 Switch & then Servers & Users.

Between 2 sites there is VPN Connection also. I have implement OSPF on this VPN network. Now there is static route.

So how can I implement OSPF?


Correct Answer by Istvan_Rabai about 8 years 4 months ago

Hi Chandrakant,


You may need to configure GRE over IPSec Tunnel instead of the site-to-site VPN connection.


GRE over IPsec will forward the multicast packets that OSPF needs to build up neighbor relationship and send - receive updates.


Here's a link that can be useful for you describing how to configure GRE over IPSec with OSPF:


http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a00800a43f6.shtml


Cheers:

Istvan

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Correct Answer
Istvan_Rabai Tue, 02/10/2009 - 22:43
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Hi Chandrakant,


You may need to configure GRE over IPSec Tunnel instead of the site-to-site VPN connection.


GRE over IPsec will forward the multicast packets that OSPF needs to build up neighbor relationship and send - receive updates.


Here's a link that can be useful for you describing how to configure GRE over IPSec with OSPF:


http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a00800a43f6.shtml


Cheers:

Istvan

kalshetty Tue, 02/10/2009 - 23:45
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HiIstvan,


Thank you very much for your valuable help.

Istvan_Rabai Wed, 02/11/2009 - 04:45
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Hi Chandrakant,


You're welcome of course.

Please rate my post if it was helpful.


Thank you:

Istvan

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