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dot1q tunneling via PPTP IPSec VPN site-to-site tunnel ?

Hi All,

I have a situation where the site-to-site tunnel is already established using PPTP IPSec VPN with non Cisco Gateways terminating the link on each end. These non Cisco Gateways do not support L2TP tunneling, and there is no plan to change them.

Beyond the Gateways on both ends, we have a Cisco 4500 series switch. We need to forward the 802.1q tagged VLANs between the two sites.

Is it possible to use 802.1Q tunneling in this case, going via a PPTP tunnel ?

Cisco's setup uses dot1q-tunnel over a L2protocol-tunnel to preserve the original client VLAN tagging, so does this mean that the only option we have is to setup a L2TP tunnel at the Cisco device endpoints, and have that tunnel go through the existing PPTP tunnel (established between the 2 non Cisco VPN Gateways) ?

Thanks

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dot1q tunneling via PPTP IPSec VPN site-to-site tunnel ?

I don't think it's possible with Catalyst 4500. Nor over IPsec VPN.