Hi Thank you. I try your way. the ipv6 address is on eth0 interface. I try to run ping6 the fe80::20c:29ff:fe3c:92a1%eth0 lt is same problem! Any idea? Thank you 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:3c:92:a1 brd ff:ff:ff:ff:ff:ff inet 192.168.1.12/24 brd 192.168.1.255 scope global eth0 inet6 fe80::20c:29ff:fe3c:92a1/64 scope link tentative valid_lft forever preferred_lft forever # ping6 fe80::20c:29ff:fe3c:92a1 connect: Invalid argument # ping6 fe80::20c:29ff:fe3c:92a1%eth0 connect: Invalid argument --- On Fri, 3/11/11, Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> wrote:
From: Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> Subject: Re: ipv6 question To: "ann kok" <oiyankok@yahoo.ca> Cc: nanog@nanog.org Received: Friday, March 11, 2011, 2:21 PM On Fri, 11 Mar 2011 11:15:36 PST, ann kok said:
inet6 addr: fe80::20c:29ff:fe3c:92a1/64 Scope:Link
This is a link level address, only valid on one interface. So you need to look at which interface it is attached to in the ifconfig output.
ping6 fe80::20c:29ff:fe3c:92a1 connect: Invalid argument
ping6 wants the interface name for link-scope addresses, because on some hardware setups, the same MAC is used for all interfaces, which means that each interface has the same link-scope address. So to disambiguate it, you have to feed it the interface name so it knows which link to use.
On my laptop, I currently have:
wlan0 Link encap:Ethernet HWaddr 00:24:D6:53:C5:BA inet6 addr: fe80::224:d6ff:fe53:c5ba/64 Scope:Link
% ping fe80::224:d6ff:fe53:c5ba%wlan0 ping6 fe80::224:d6ff:fe53:c5ba%wlan0 PING fe80::224:d6ff:fe53:c5ba%wlan0(fe80::224:d6ff:fe53:c5ba) 56 data bytes 64 bytes from fe80::224:d6ff:fe53:c5ba: icmp_seq=1 ttl=64 time=0.072 ms 64 bytes from fe80::224:d6ff:fe53:c5ba: icmp_seq=2 ttl=255 time=0.081 ms 64 bytes from fe80::224:d6ff:fe53:c5ba: icmp_seq=3 ttl=255 time=0.090 ms ^C --- fe80::224:d6ff:fe53:c5ba%wlan0 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 0.072/0.081/0.090/0.007 ms