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Community Member

Dynamic routing with IPsec tunnels

Can i use dynamic routing (OSPF etc.),multicasting across an IPsec tunnel in tunnel mode, or is it a must to use GRE with IPsec in transport mode ?

2 REPLIES
Community Member

Re: Dynamic routing with IPsec tunnels

Best solution would be to use tunnel model in combination with GRE tunneling.

Community Member

Re: Dynamic routing with IPsec tunnels

Hi -thnx.thats right but my problem will be the load increased on the router due to GRE.I will be having many tunnels.

Can you suggest any practical limit on the number of tunnels (with GRE and without) on a 3745 router ?

And any other way possible supporting multicast without GRE ?

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