About IPv6 Link-Local Address(CentOS5)

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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:
$B!A(B
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 ttld time=0.033 ms
64 bytes from 192.168.11.8: icmp_seq=2 ttld time=0.019 ms
$B!A(B

# 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

Thanks!

4 thoughts on - About IPv6 Link-Local Address(CentOS5)

  • > The current version of CentOS 5, is 5.11
    >
    > An immediate upgrade is recommeneded.

    Thanks for the response.

    I have updated CentOS5 to 11. However, It did not resolve….

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  • > 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

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    株式会社デージーネット
    フロンティア開発部
    米山 陽介
    TEL: (052)709-7121 FAX: (052)709-7122
    e-mail: komeyama@designet.co.jp

    URL: http://www.designet.co.jp
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  • > 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?

    Thanks for the response. I’m sorry when it was misguided answer.

    The setting of the IP address reaches by manual operation.

    # cat /etc/sysconfig/network-scripts/ifcfg-eth1
    DEVICE=eth1
    BOOTPROTO=”none”
    ONBOOT=yes HWADDR=08:00:27:83:74:54
    IPADDR=192.168.11.8
    NETMASK=255.255.255.0
    IPV6INIT=yes IPV6ADDR=2000:8000:12:6:192:168:11:8/64
    IPV6_DEFAULTGW=2000:7000:12:6::1

    ■ link up
    # ethtool eth1
    Settings for eth1:
    ～
    Link detected: yes

    # ifdown eth1
    # ifup eth1
    # 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: fe80::a00:27ff:fe83:7454/64 Scope:Link ←○
    inet6 addr: 2000:8000:12:6:192:168:11:8/64 Scope:Global

    ■ link down
    # ethtool eth1
    Settings for eth1:
    ～
    Link detected: no

    # ifdown eth1
    # ifup eth1
    # 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

    Missing fe80::a00:27ff:fe83:7454/64.

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    株式会社デージーネット
    フロンティア開発部
    米山 陽介
    TEL: (052)709-7121 FAX: (052)709-7122
    e-mail: komeyama@designet.co.jp

    URL: http://www.designet.co.jp
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