[strongSwan] ipv6 connection not working

[Ko, HsuenJu]

Hi,
I am testing ipv6 connection using ikev1 and it appears ike exchange packet was not seen by tcpdump.  Here is the information.

Here is the version that I am using.

Linux strongSwan U5.2.0/K2.6.32-504.el6.x86_64


Here is the config.

conn conn_14_ike1_ipv6_122
     left=fcc1:e::53
     leftcert=test_1.14_cert_ipv6.der
     leftca=%same
     right=fcc1:e::7a
     rightid=fcc1:e::7a
     rightca="C=US, O=XXX, OU=VOS IPSec Tests, CN=test 1 14 v6 CA"
     esp=aes128-sha256-modp2048!
     ike=aes128-sha256-modp2048!
     keyexchange=ikev1
     marginbytes=3400000
     ikelifetime=24h
     lifetime=24h

And here are some information from the log.

May 15 06:44:24 15[KNL] creating acquire job for policy fcc1:e::53/128[udp/41615] === fcc1:e::7a/128[udp/blackjack] with reqid {8}
...
May 15 06:44:24 14[IKE] initiating Main Mode IKE_SA conn_14_ike1_ipv6_122[1] to fcc1:e::7a
May 15 06:44:24 14[IKE] IKE_SA conn_14_ike1_ipv6_122[1] state change: CREATED => CONNECTING
May 15 06:44:24 14[CFG] configured proposals: IKE:AES_CBC_128/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048
...
May 15 06:49:46 16[NET] sending packet: from 10.1.14.83[500] to 10.1.14.122[500] (160 bytes)
May 15 06:49:46 07[NET] sending packet: from 10.1.14.83[500] to 10.1.14.122[500]

However, I never see this packet with tcpdump.  If I used ipv4 address instead, I can see the tcpdump showing that UDP packets.  I saw issue #860 with acquire job message.  But that issue seems only apply to ikev2.   Can someone explain what might be wrong?

Thanks!
Bettina
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