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Cisco Employee

VPN L2L - Old 12.2 Image - NAT-T Support

Hello all.

I need to set up a VPN between two routers. One of them is behind a NAT device. The other one is a 1751, running a 12.2(4)T image. I'm having trouble enabling NAT-T for this device. It seems that the command "crypto ipsec nat-transparency udp-encapsulation" is not available. IOS upgrade is not an option here. Is there something I can do?

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