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On Fri, Jan 6, 2012 at 3:09 PM, Michael Mol <mikemol@×××××.com> wrote: |
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> Grant Edwards wrote: |
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>> I've enabled ipv6 support in my kernel and it appears to be working on |
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>> the "lo" interface: |
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>> |
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>> # ip -6 addr show lo |
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>> |
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>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 |
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>> inet6 ::1/128 scope host |
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>> valid_lft forever preferred_lft forever |
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>> |
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>> # ping6 -c3 ::1 |
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>> |
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>> PING ::1(::1) 56 data bytes |
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>> 64 bytes from ::1: icmp_seq=1 ttl=64 time=0.022 ms |
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>> 64 bytes from ::1: icmp_seq=2 ttl=64 time=0.021 ms |
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>> 64 bytes from ::1: icmp_seq=3 ttl=64 time=0.021 ms |
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>> |
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>> --- ::1 ping statistics --- |
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>> 3 packets transmitted, 3 received, 0% packet loss, time 1998ms |
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>> rtt min/avg/max/mdev = 0.021/0.021/0.022/0.003 ms |
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>> |
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>> And the other interfaces all have link-local addresses: |
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>> |
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>> # ip -6 addr show eth1 |
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>> 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000 |
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>> inet6 fe80::216:17ff:fe84:a7b3/64 scope link |
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>> valid_lft forever preferred_lft forever |
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>> |
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>> But I can't ping6 any of the "real" interfaces (or any external |
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>> address): |
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>> |
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>> # ping6 -c3 fe80::216:17ff:fe84:a7b3 |
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>> |
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>> connect: Invalid argument |
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>> |
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>> Why can I ping "lo" at ::1 and not "eth1" at fe80::216:17ff:fe84:a7b3? |
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>> |
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>> I'm guessing there might other packages I have to re-emerge with the |
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>> ipv6 use flag. But, I do not want to rebuild everything capable of |
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>> supporting ipv6, since there are only a few selected programs that |
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>> I'll be using with ipv6. I thought I might have to rebuild glibc, but |
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>> it doens't list ipv6 as one of it's use flags. |
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>> |
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>> Any hints? |
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>> |
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> |
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> ping6 -c3 fe80::216:17ff:fe84:a7b3%eth0 |
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> |
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> Link-local addresses are only valid at the link-level scope, and you |
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> have to specify which link you're referring to. Global-scope addresses |
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> don't have the same limitation. |
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|
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and to see the scope you can view the output of ifconfig, see |
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something in there like this next to each address: |
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|
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scopeid 0x0<global> |
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scopeid 0x20<link> |
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