Greetings, I am not an expert on the Aruba. I was however able to get the Aruba to connect site-to-site with strongSwan and a Cisco ASA. Without a map it is hard to determine what your source and destination networks are like. Also do you have security logging setup?
(st2-sv-aruba-1) (config) #logging level debugging security
You can then use the "show log security all" or the "show log security 50" (50 being the last number number lines in the log that I normally want to see) . You may already be doing this. Do the logs indicate anything special? You may want to post them.
My configuration for a tunnel. You can't duplicate it in your senario, but you can glean some based on what I am doing.
crypto-local ipsec-map SV-10 10
version v2
set ikev2-policy 1
peer-ip 0.0.0.0
peer-cert-dn "/C=US/ST=New York/L=Rome/O=AIS/OU=SecureView/CN=DT-010.info.com/emailAddress=new@old.com"
vlan 903 (This is my outside or untrusted port vlan)
src-net 172.22.201.0 255.255.255.0 (This is the trusted side)
dst-net 172.16.240.36 255.255.255.252 (This is the initiator of the connection on the untrusted side)
set transform-set "strong"
set security-association lifetime seconds 43200
set pfs group20
pre-connect disable
trusted enable
force-natt disable
set ca-certificate cacert_ec
set server-certificate aruba_ec
exit
As you can see I am using certs, but PSK works as well with some changes. This is a working configuration. I am sure that others will add information. I am not the expert, just a user of the product.
Douglas