[CentOS] About IPv6 Link-Local Address(CentOS5)

[Paul Heinlein]

On Fri, 13 Nov 2015, 米山陽介 wrote:

>>  Try
>>
>>     ping6 -I eth1 2000:8000:12:6:192:168:11:8
>
> Thanks for the response.
>
> I tried.
> However, It did not resolve....
>
> # ping6 -I eth1 2000:8000:12:6:192:168:11:8
> PING 2000:8000:12:6:192:168:11:8(2000:8000:12:6:192:168:11:8) from 
> fe80::a00:27ff:fe03:5b8a eth1: 56 data bytes

First off, I assume you can ping your link-local address:

   ping6 -I eth1 fe80::a00:27ff:fe03:5b8a

Second, you never mentioned how eth1 was assigned its IPv6 address. 
Given that you've tried to embed an IPv4 address within an IPv6 
address (which is normally done with a 0:0:0:0:0: prefix), I'd guess 
you did it manually. If so, with what tools?

>
> On 2015/11/13 2:22, Paul Heinlein wrote:
>>  On Thu, 12 Nov 2015, 米山陽介 wrote:
>> 
>> >  Hello
>> > 
>> >  Because I did not send , and then retransmitted.
>> > 
>> >  I am using the CentOS5.7.
>> >  In a state where the link down, I did a ping to the IPv4 and IPv6.
>> >  IPv4 succeeds in ping. but, IPv6 is ping fails.
>> >  Once confirmed by ifconfig, it did not have a Link-Local Address.
>> >  At link down, Is the Link-Local Address not set?
>> >  Leave the link down, Is there a way to avoid this?
>> > 
>> >  # ethtool eth1
>> >  Settings for eth1:
>> >  ～
>> >         Link detected: no
>> > 
>> >  # ifconfig eth1
>> >  eth1      Link encap:Ethernet  HWaddr 08:00:27:83:74:54
>> >           inet addr:192.168.11.8  Bcast:192.168.11.255 
>> >           Mask:255.255.255.0
>> >           inet6 addr: 2000:8000:12:6:192:168:11:8/64 Scope:Global
>> >           UP BROADCAST MULTICAST  MTU:1500  Metric:1
>> >           RX packets:786 errors:0 dropped:0 overruns:0 frame:0
>> >           TX packets:289 errors:0 dropped:0 overruns:0 carrier:0
>> >           collisions:0 txqueuelen:1000
>> >           RX bytes:81093 (79.1 KiB)  TX bytes:46507 (45.4 KiB)
>> > 
>> >  # ping 192.168.11.8
>> >  PING 192.168.11.8 (192.168.11.8) 56(84) bytes of data.
>> >  64 bytes from 192.168.11.8: icmp_seq=1 ttl=64 time=0.033 ms
>> >  64 bytes from 192.168.11.8: icmp_seq=2 ttl=64 time=0.019 ms
>> >  ～
>> > 
>> >  # ping6 2000:8000:12:6:192:168:11:8
>> >  PING 2000:8000:12:6:192:168:11:8(2000:8000:12:6:192:168:11:8) 56 data
>> >  bytes
>>
>>  Try
>>
>>     ping6 -I eth1 2000:8000:12:6:192:168:11:8
>> 
>> 
>>
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>
>

-- 
Paul Heinlein
heinlein at madboa.com
45°38' N, 122°6' W