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New Member

Routing over L2TP over IPsec

Does CISCO support dynamic routing over transport mode L2TP/IPsec tunnels?

Thanks,

_Kiran

6 REPLIES
New Member

Re: Routing over L2TP over IPsec

GRE is a good way to tunnel routing protocols and other multicast packets.

New Member

Re: Routing over L2TP over IPsec

in RFC 2784, they get rid of several fields, such as

"key" and "sequence number". how will this effect

GRE's capability of being a tunneling protocol?

New Member

Re: Routing over L2TP over IPsec

Yes, but what are the other alternatives? Is it possible at all to do dynamic routing using L2TP/IPsec?

New Member

Re: Routing over L2TP over IPsec

With IPSEC I think your access-list can permit multi-cast or broadcast traffic therefore allowing dynamic routing table to update. I’ve never tried it though so it might be worth getting one of Cisco’s engineers on the line if it doesn’t work. Anyone out there doing this?

New Member

Re: Routing over L2TP over IPsec

HI Kiran,

Cisco Does support dynamic routing over transport mode l2tp/ipsec tunnels.

Regards

Manoj.

New Member

Re: Routing over L2TP over IPsec

Thank you Manoj. We were configuring another box that does not support GRE over IPsec, and so wanted to try and interoperate with CISCO using L2TP/IPsec.

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