Does Cisco 2911 router ios ver15.1T support any connect 3.x vpn? Because when i configure Anyconnect 4.x and connect with VPN, router cpu usage rise above 90%.

Hello, I need advise. Can anybody advise me which Secure VPN should i configure on Cisco 2911 OS ver 15.4 router for remote access on both laptop and android phone? However Cisco 2911 does not support anyconnect VPN. Thanks