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 Thanks! -- ■□■□■□■□■□■□■□■□■□■□■□■ 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@xxxxxxxxxxxxxx URL: http://www.designet.co.jp ■□■□■□■□■□■□■□■□■□■□■□■ _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos