CentOS 7でのIPv6設定
CentOS 6と7でぜんぜん違うので注意。6は文献・資料多いが、7は少ない
- v6有効やデフォゲ設定(2箇所)
・/etc/sysconfig/network-scripts/ifcfg-eno16777984
TYPE="Ethernet" BOOTPROTO="none" DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" # IPv6を有効にする IPV6_AUTOCONF="no" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" NAME="eno16777984" UUID="c22605a4-4cec-4c1b-9382-090d1db46fd1" DEVICE="eno16777984" ONBOOT="yes" DNS1=10.1.11.13 DNS2=10.1.11.1 IPADDR=10.1.33.158 PREFIX=24 GATEWAY=10.1.33.254 IPV6ADDR=2400:4010:427:33::158/64 IPV6_DEFAULTGW=2400:4010:427:33::10 IPV6_PEERDNS=yes IPV6_PEERROUTES=yes IPV6_PRIVACY=no
・/etc/sysconfig/network
# Created by anaconda NETWORKING_IPV6=yes # IPv6を有効にする IPV6FORWARDING=yes IPV6_AUTOCONF=no # IPv6アドレスの自動設定を無効にする IPV6_AUTOTUNNEL=no #IPV6_DEFAULTGW=2003:6800:8345:1033:10:33:1:158%eno16777984 IPV6_DEFAULTDEV=eno16777984
- スタティックルートの追加(恒久的)(2箇所)
・/etc/sysconfig/static-routes-ipv6
eno16777984 2000:4010:0427:0033::/64 2400:4010:427:33:21b:17ff:fe00:110
・/etc/sysconfig/network-scripts/route6-eno16777984
2400:4010:427:3100::/60 via 2400:4010:427:33::10 metric 10
- スタティックルートの追加・削除(一時的)
# route add -A inet6 2001:db8:0:100::/64 gw 2001:db8::200 # route del -A inet6 2001:db8:0:100::/64 gw 2001:db8::200
- アドレスの追加・削除・確認
# ip addr add 2001:db8::80:1/64 dev eth0
# ip addr del 2001:db8::80:1/64 dev eth0
# ip -6 addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2003:6800:8345:1033:10:1:33:158/64 scope global
valid_lft forever preferred_lft forever
inet6 2400:4010:427:33::158/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::250:56ff:feae:5613/64 scope link
valid_lft forever preferred_lft forever・DNSサーバの設定
# nmcli connection modify eno1 ipv6.dns "2001:db8:0::1 2001:db8:0::2"
・NDの確認・追加
# ip -f inet6 neigh show 2400:4010:427:33::5 dev eno16777984 FAILED 2400:4010:427:33::6 dev eno16777984 FAILED 2400:4010:427:33::10 dev eno16777984 FAILED # ip -f inet6 neigh add 2400:4010:427:33::10 lladdr 00:1b:17:00:01:10 dev eno16777984
- 設定後のネットワーク再起動
# /etc/rc.d/init.d/network restart # service network restart # systemctl restart NetworkManager
- 確認
・ルーティングテーブルの表示(2通り)
# route -n -A inet6 Kernel IPv6 routing table Destination Next Hop Flag Met Ref Use If ::/96 :: !n 1024 0 0 lo 0.0.0.0/96 :: !n 1024 0 0 lo 2002:a00::/24 :: !n 1024 0 0 lo 2002:7f00::/24 :: !n 1024 0 0 lo 2002:a9fe::/32 :: !n 1024 0 0 lo 2002:ac10::/28 :: !n 1024 0 0 lo 2002:c0a8::/32 :: !n 1024 0 0 lo 2002:e000::/19 :: !n 1024 0 0 lo 2003:6800:8345:1033::/64 :: U 256 0 1 eno16777984 2400:4010:427:33::/64 :: U 256 0 1 eno16777984 3ffe:ffff::/32 :: !n 1024 0 0 lo fe80::/64 :: U 256 0 0 eno16777984 ::/0 2003:6800:8345:1033::253 UG 1 0 0 eno16777984 ::/0 2400:4010:427:33::10 UG 100 0 0 eno16777984 ::/0 :: !n -1 1 38 lo ::1/128 :: Un 0 1 3 lo 2003:6800:8345:1033::/128 :: Un 0 1 0 lo 2003:6800:8345:1033:10:1:33:158/128 :: Un 0 1 0 lo 2400:4010:427:33::/128 :: Un 0 1 0 lo 2400:4010:427:33::158/128 :: Un 0 1 12 lo fe80::/128 :: Un 0 1 0 lo fe80::250:56ff:feae:5613/128 :: Un 0 1 0 lo ff00::/8 :: U 256 0 0 eno16777984 ::/0 :: !n -1 1 38 lo # ip -6 route unreachable ::/96 dev lo metric 1024 error -101 unreachable ::ffff:0.0.0.0/96 dev lo metric 1024 error -101 unreachable 2002:a00::/24 dev lo metric 1024 error -101 unreachable 2002:7f00::/24 dev lo metric 1024 error -101 unreachable 2002:a9fe::/32 dev lo metric 1024 error -101 unreachable 2002:ac10::/28 dev lo metric 1024 error -101 unreachable 2002:c0a8::/32 dev lo metric 1024 error -101 unreachable 2002:e000::/19 dev lo metric 1024 error -101 2003:6800:8345:1033::/64 dev eno16777984 proto kernel metric 256 2400:4010:427:33::/64 dev eno16777984 proto kernel metric 256 unreachable 3ffe:ffff::/32 dev lo metric 1024 error -101 fe80::/64 dev eno16777984 proto kernel metric 256 default via 2003:6800:8345:1033::253 dev eno16777984 metric 1 default via 2400:4010:427:33::10 dev eno16777984 proto static metric 100
・ping
# ping6 2400:4010:427:33::158 PING 2400:4010:427:33::158(2400:4010:427:33::158) 56 data bytes 64 bytes from 2400:4010:427:33::158: icmp_seq=1 ttl=64 time=0.075 ms 64 bytes from 2400:4010:427:33::158: icmp_seq=5 ttl=64 time=0.089 ms 64 bytes from 2400:4010:427:33::158: icmp_seq=6 ttl=64 time=0.086 ms ^C --- 2400:4010:427:33::158 ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 4999ms rtt min/avg/max/mdev = 0.075/0.088/0.104/0.008 ms ※Paloの場合 > ping inet6 yes host 2400:4010:427:33::158
〔参考〕
CentOSでIPv6アドレスの設定方法
CentOSでIPv6のスタティックルートの追加方法
CentOS7 IPv6の設定
これから始めるIPv6（3）：3つの手順で実現、サーバOSのIPv6対応 (2/2) - ＠IT
