unable to ping the same interface after configuring an IPv6 address ubuntu 12.04

[sumitkamboj]

I setup IPv6 in my Ubuntu 12.04 on eth0 using command

ifconfig eth0 inet6 add 2001:db8:fedc:cdef::1/64 but when i try to ping eth0 itself using

ping6 2001:db8:fedc:cdef::1

it always gives

PING 2001:db8:fedc:cdef:0:0:0:1(2001:db8:fedc:cdef::1) 56 data bytes
From ::1 icmp_seq=1 Destination unreachable: Address unreachable
From ::1 icmp_seq=2 Destination unreachable: Address unreachable
From ::1 icmp_seq=3 Destination unreachable: Address unreachable

I think that it automatically is pinging from ::1 to `2001:db8:fedc:cdef::1

Command

ip addr show dev eth0 it gives

2: eth0:<NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000 link/ether 00:1b:38:a1:a2:50 brd ff:ff:ff:ff:ff:ff inet6 2001:db8:fedc:cdef::1/64 scope global tentative valid_lft forever preferred_lft forever

Command

ip -6 route it gives

2001:db8:fedc:cdef::/64 dev eth0 proto kernel metric 256 fe80::/64 dev eth0 proto kernel metric 256

Command

ip6tables -L

it gives

Chain INPUT (policy ACCEPT) target prot opt source destination
Chain FORWARD (policy ACCEPT) target prot opt source destination
Chain OUTPUT (policy ACCEPT) target prot opt source destination

Command

ip6tables -F
it gives nothing.

Please help how to solve this.

[fdrake]

man ping

-I interface address

Set source address to specified interface address. Argument may be numeric IP address or name of device. When pinging IPv6 link-local address this option is required.

try this :

ping -I eth0 2001:db8:fedc:cdef::1

check my post I edited my code

[sumitkamboj]

thanks for reply

it still not working.
please help i stuck here from last 15 days.
i would let you know that i have dual boot ubuntu 12.04. another ubuntu(that is upgraded from ubuntu 11.10) doing the same for me very well.

[prodigy_]

state DOWN

What are you trying to ping? ;)

NO-CARRIER

I'd start with connecting a network cable. (If it's already connected, more info is needed. For starters, what's on the other side and has this connection ever worked before). Then try:

sudo ifconfig eth0 up

[sumitkamboj]

I am trying to set IPv6 address to a Ethernet interface(eth0) so that i can ping the eth0 interface. There is no role of cable because i am trying to ping the same interface in my PC. For example when i try to ping lo(localhost) using command

ping6 -I lo ::1

it reply with ICMP request.
i want to do the same for my eth0 interface so that i get reply from eth0.

[sumitkamboj]

this may have clue for someone command

ip -6 route get 2001:db8:fedc:cdef::1 gives

2001:db8:fedc:cdef::1 from :: via 2001:db8:fedc:cdef::1 dev eth0 src ::1 metric 0 cache

why it has src ::1 ?