Firstable, know that I am a beginner in the IPv6 world..
My ISP just gave me an IPv6 block : 2A01:XXXX:1: 100::/56
I have a Cisco ASA running behind my ISP router (see the attached schema)..
The internal interface of the ISP router is configured like this :
no ipv6 redirects
ipv6 nd other-config-flag
ipv6 dhcp server LANv6-Stateless
The outside interface of the ASA is configured like this :
asafirewall# sh ipv6 int outside
outside is up, line protocol is up
IPv6 is enabled, link-local address is fe80::21b:53ff:feff:7ca
Global unicast address(es):
2a01:XXXX:1:100::2, subnet is 2a01:XXXX:1:100::/56
Joined group address(es):
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised retransmit interval is 1000 milliseconds
ND router advertisements are sent every 200 seconds
ND router advertisements live for 1800 seconds
Hosts use stateless autoconfig for addresses.
The default route is also configured :
S ::/0 [1/0]
via 2a01:XXXX:1:100::1, outside
When I try to ping my ISP router (or other internet IPv6 host) from the ASA, I have the following in the logging tab :
Src IP : 2a01:XXXX:1:100::2 Src Port : 0 Dst IP : ff02::1:ff00:1 Dst Port : 0
Built outbound ICMP connection for faddr ff02::1:ff00:1/0 gaddr 2a01:XXXX:1:100::2/0 laddr 2a01:XXXX:1:100::2/0
I don't really understand why my ping goes to the multicast address "ff02::1:ff00:1/0" instead of "2a01:XXXX:1:100::1"..
Any idea ?
PS : Excuse my English