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New Member

multicasting over an asa5520 site-to-site ipsec tunnel

Does anyone know how to forward multicast packets across an established ipsec site-to-site vpn tunnel

3 REPLIES
New Member

Re: multicasting over an asa5520 site-to-site ipsec tunnel

Hi, traditional IPSec not supports muticast traffic, somehow you have to encapsulate with GRE.

Followed is a link OSPF which is multicast with GRE over IPSec example:

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

HTH

New Member

Re: multicasting over an asa5520 site-to-site ipsec tunnel

Thanks for answer, unfortunately ASA5520 does not do GRE tunnels so no solution there

New Member

Re: multicasting over an asa5520 site-to-site ipsec tunnel

Yes, ASA not support GRE originated or terminated on itself but can encrypt/decrypt pass-through GRE traffic.

The link I posted is example of a workaround, you can see GRE originated and terminated on two IOS routers behind PIX. The bad side of this solution is you have to involve other devices not just ASA itself.

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