From: Michael Mol <mikemol@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] ipv6 problem with ping6
Date: Fri, 06 Jan 2012 16:09:52 -0500 [thread overview]
Message-ID: <4F076320.8030208@gmail.com> (raw)
In-Reply-To: <je7ngo$hlr$1@dough.gmane.org>
Grant Edwards wrote:
> I've enabled ipv6 support in my kernel and it appears to be working on
> the "lo" interface:
>
> # ip -6 addr show lo
>
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
> inet6 ::1/128 scope host
> valid_lft forever preferred_lft forever
>
> # ping6 -c3 ::1
>
> PING ::1(::1) 56 data bytes
> 64 bytes from ::1: icmp_seq=1 ttl=64 time=0.022 ms
> 64 bytes from ::1: icmp_seq=2 ttl=64 time=0.021 ms
> 64 bytes from ::1: icmp_seq=3 ttl=64 time=0.021 ms
>
> --- ::1 ping statistics ---
> 3 packets transmitted, 3 received, 0% packet loss, time 1998ms
> rtt min/avg/max/mdev = 0.021/0.021/0.022/0.003 ms
>
> And the other interfaces all have link-local addresses:
>
> # ip -6 addr show eth1
> 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
> inet6 fe80::216:17ff:fe84:a7b3/64 scope link
> valid_lft forever preferred_lft forever
>
> But I can't ping6 any of the "real" interfaces (or any external
> address):
>
> # ping6 -c3 fe80::216:17ff:fe84:a7b3
>
> connect: Invalid argument
>
> Why can I ping "lo" at ::1 and not "eth1" at fe80::216:17ff:fe84:a7b3?
>
> I'm guessing there might other packages I have to re-emerge with the
> ipv6 use flag. But, I do not want to rebuild everything capable of
> supporting ipv6, since there are only a few selected programs that
> I'll be using with ipv6. I thought I might have to rebuild glibc, but
> it doens't list ipv6 as one of it's use flags.
>
> Any hints?
>
ping6 -c3 fe80::216:17ff:fe84:a7b3%eth0
Link-local addresses are only valid at the link-level scope, and you
have to specify which link you're referring to. Global-scope addresses
don't have the same limitation.
Also, for fun, try this:
ping6 -c3 ff02::1%eth0
next prev parent reply other threads:[~2012-01-06 21:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-06 21:02 [gentoo-user] ipv6 problem with ping6 Grant Edwards
2012-01-06 21:09 ` Michael Mol [this message]
2012-01-06 21:20 ` Paul Hartman
2012-01-06 21:27 ` Michael Mol
2012-01-06 21:40 ` [gentoo-user] " Grant Edwards
2012-01-06 21:51 ` Grant Edwards
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