I have a 2900 ISR that my VPN clients connect to using IPSEC over UDP. I am having periodic problems, especially with clients connecting through DSL, where they connect and immediately drop. Sometimes this is resolved by users updating their home router firmware. I'd like to issue a new client PCF file using IPSEC over TCP to see if that resolves the problems.
Can I have both running at once, and what do I need to add to the 2900 to enable this connectivty without breaking the existing clients? If the test is successful, I will migrate all users to the new configuration. This ISR is also used to support L2L connectivity for a handful of sites.
