Hi,
Well it depends on how you've configured your ASA, Routed based or Policy Based VPN using IKEv1 or IKEv2?
Below is an example of Policy Based VPN using IKEv1.
ip access-list extended ACL_VPN_Map
permit ip 192.168.1.0 0.0.0.255 10.155.0.0 0.0.0.255
crypto isakmp enable
crypto isakmp policy 1
encryption aes 128
authentication pre-share
group 2
hash sha
exit
crypto isakmp key RANdomK3y11 address 1.1.1.2
crypto ipsec transform-set TSET esp-aes 128 esp-sha-hmac
crypto map R2_Map 1 ipsec-isakmp
match address ACL_VPN_Map
set peer 1.1.1.2
set pfs group2
set transform-set TSET
interface gigabitethernet 0/1
crypto map R2_Map
HTH