testing: Add scenario that uses IKE-specific interface IDs

testing/tests/route-based/net2net-xfrmi-ike/hosts/sun/etc/strongswan.conf

@@ -0,0 +1,12 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+  load = pem pkcs1 x509 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+  load = random nonce aes sha1 sha2 pem pkcs1 curve25519 gmp x509 curl revocation hmac vici kernel-netlink socket-default
+  start-scripts {
+    updown = /usr/bin/python /etc/updown.py
+  }
+}