[6bone] Help: Cannot assign requested address?

[Warodom Werapun]

    Why I got error message "Cannot assign requested address"?
Tested on Linux Redhat 8.0, Kernel 2.4.20.

[root@MN sysconfig]# ifconfig eth1 | grep inet6
          inet6 addr: 3ffe:b80:1e99:2::2/64 Scope:Global
          inet6 addr: fe80::2e0:29ff:fe79:ff5/10 Scope:Link

[root@MN sysconfig]# ping6 -I eth1 fe80::2e0:29ff:fe79:ff5
ping: bind icmp socket: Cannot assign requested address
[root@MN sysconfig]# ping6 3ffe:b80:1e99:2::2
connect: Cannot assign requested address
[root@MN sysconfig]# ping6 -I eth1 3ffe:b80:1e99:2::2
connect: Cannot assign requested address

Thank you for reply
- Warodom  Werapun