Centos 7下IPV6 有状态DHCPV6配置

yum源安装keayum install epel-releaseyum install kea

DEMONps aux| grep kearpm -qa kea
查看dhcpv6默认配置cat /etc/kea/kea.conf
启动kea-dhcpv6并查看kea启动过程systemctl start kea-dhcp6systemctl status kea-dhcp6systemctl -l status kea-dhcp6
通过tcpdump查看服务器数据包交互过程tcpdump -i eth0 -w dhcp6.pcap

关闭防火墙systemctl stop firewalld.service注意：必须要关闭防火墙否则造成dhcpv6分配地址无法下发。
用到的文件：/var/lib/kea/kea-leases6.csv 默认情况下存放ipv6地址以及终端的设备信息，可查看到域账号mac地址等信息。/var/log/kea-dhcp6.log 我开的debug模式。可查看dhcp6运行状态的日志。

Centos 7 修改dns修改/etc/NetworkManager/NetworkManager.conf[main]plugins=ifcfg-rhdns=none手工修改 /etc/resolv.confnameserver 114.114.114.114nameserver 8.8.8.8
服务器网卡静态ipv6配置：
[root@localhost kea]# vi /etc/sysconfig/network-scripts/ifcfg-eno16777736TYPE=EthernetBOOTPROTO=staticDEFROUTE=yesPEERDNS=yesPEERROUTES=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=noIPV6_DEFROUTE=yesIPV6_PEERDNS=yesIPV6_PEERROUTES=yesIPV6_FAILURE_FATAL=noNAME=eno16777736UUID=03b35ca7-4678-48ca-ab46-5782367cd56aDEVICE=eno16777736ONBOOT=yesIPADDR=X.X.X.XGATEWAY=X.X.X.XNETMASK=X.X.X.XIPVADDR=2001:da8:XXXX:XXXX:24::125IPV6_DEFAULTGW=2001:da8:XXXX:XXXX:24::1IPV6ADDR=2001:da8:XXXX:XXXX:24::125/80

kea-dhcpv6 配置：
{
“Dhcp6”:{# Add names of interfaces to listen on. “interfaces-config”: { “interfaces”: [“eno16777736/2001:da8:XXXX:XXXX:24:aefd:ddb0:7d02”] },
“option-data”: [{“name”: “unicast”,”data”: “2001:da8:XXXX:XXXX:24:aefd:ddb0:7d02”} ],# Use Memfile lease database backend to store leases in a CSV file.
# Setup reclamation of the expired leases and leases affinity.# Expired leases will be reclaimed every 10 seconds. Every 25# seconds reclaimed leases, which have expired more than 3600# seconds ago, will be removed. The limits for leases reclamation# are 100 leases or 250 ms for a single cycle. A warning message# will be logged if there are still expired leases in the# database after 5 consecutive reclamation cycles.# “expired-leases-processing”: {# “reclaim-timer-wait-time”: 10,# “flush-reclaimed-timer-wait-time”: 25,# “hold-reclaimed-time”: 3600,# “max-reclaim-leases”: 100,# “max-reclaim-time”: 250,# “unwarned-reclaim-cycles”: 5# },
# Addresses will be assigned with preferred and valid lifetimes# being 3000 and 4000, respectively. Client is told to start# renewing after 1000 seconds. If the server does not respond# after 2000 seconds since the lease was granted, client is supposed# to start REBIND procedure (emergency renewal that allows switching# to a different server). “preferred-lifetime”: 3000, “valid-lifetime”: 4000, “renew-timer”: 1000, “rebind-timer”: 2000,
# The following list defines subnets. Uncomment to enable them. “subnet6”: [ { “subnet”: “2001:da8:XXXX:XXXX:25::/80”, “pools”: [ { “pool”: “2001:da8:XXXX:XXXX:25::/80” } ], “interface-id”:”vlan25″
},
{ “subnet”: “2001:da8:XXXX:XXXX:26::/80”, “pools”: [ { “pool”: “2001:da8:XXXX:XXXX:26::/80” } ], “interface-id”:”vlan26″
},# { “subnet”: “2001:db8:3::/64”,# “pools”: [ { “pool”: “2001:db8:3::/80” } ] },# { “subnet”: “2001:db8:4::/64”,# “pools”: [ { “pool”: “2001:db8:4::/80” } ] } ]},
# DHCP DDNS configuration starts here.
# Logging configuration starts here. It tells Kea servers to store# all log messages (on severity INFO or more) in a file.# debuglevel variable is used on DEBUG level only.”Logging”:{ “loggers”: [ { “name”: “kea-dhcp4”, “output_options”: [ { “output”: “/var/log/kea-dhcp4.log” } ], “severity”: “INFO”, “debuglevel”: 0 }, { “name”: “kea-dhcp6”, “output_options”: [ { “output”: “/var/log/kea-dhcp6.log” } ], “severity”: “DEBUG”, /日志开启到debug级别，可以查看分配的地址信息。 “debuglevel”: 99 }, { “name”: “kea-dhcp-ddns”, “output_options”: [ { “output”: “/var/log/kea-ddns.log” } ], “severity”: “INFO”, “debuglevel”: 0 } ]}
}

如果自己网段内需要dhcpv6服务 需开通以下：

[root@localhost kea]# cat /etc/kea/kea.conf# This is a basic configuration for the Kea DHCPv4 and DHCPv6 servers.# Subnet declarations are commented out and no interfaces are listed.# Therefore, the servers will not listen or respond to any queries.# The basic configuration must be extended to specify interfaces on# which the servers should listen. Also, subnets and options must be# declared.{
# DHCPv4 configuration starts here.#”Dhcp4″:#{# Add names of interfaces to listen on.# “interfaces-config”: {# “interfaces”: [ ]# },
# Use Memfile lease database backend to store leases in a CSV file.# “lease-database”: {# “type”: “memfile”# },
# Setup reclamation of the expired leases and leases affinity.# Expired leases will be reclaimed every 10 seconds. Every 25# seconds reclaimed leases, which have expired more than 3600# seconds ago, will be removed. The limits for leases reclamation# are 100 leases or 250 ms for a single cycle. A warning message# will be logged if there are still expired leases in the# database after 5 consecutive reclamation cycles.# “expired-leases-processing”: {# “reclaim-timer-wait-time”: 10,# “flush-reclaimed-timer-wait-time”: 25,# “hold-reclaimed-time”: 3600,# “max-reclaim-leases”: 100,# “max-reclaim-time”: 250,# “unwarned-reclaim-cycles”: 5# },
# Global (inherited by all subnets) lease lifetime is mandatory parameter.# “valid-lifetime”: 4000,
# Below an example of the simple subnet declaration. Uncomment to# enable it. This is a list, denoted with [ ], of structure, denoted# with { }. Each structure describes a single subnet and may have# several parameters. One of those parameters is “pools” that is# also a list of structures.# “subnet4”: [# { “subnet”: “192.0.2.0/24”,# “pools”: [ { “pool”: “192.0.2.1 – 192.0.2.200” } ] }# ]#},
# DHCPv6 configuration starts here.”Dhcp6″:{# Add names of interfaces to listen on. “interfaces-config”: { “interfaces”: [“eno16777736/2001:da8:XXXX:XXXX:24::125”] },
“option-data”: [{“name”: “unicast”,”data”: “2001:da8:XXXX:XXXX:24::125”} ],# Use Memfile lease database backend to store leases in a CSV file.
# Setup reclamation of the expired leases and leases affinity.# Expired leases will be reclaimed every 10 seconds. Every 25# seconds reclaimed leases, which have expired more than 3600# seconds ago, will be removed. The limits for leases reclamation# are 100 leases or 250 ms for a single cycle. A warning message# will be logged if there are still expired leases in the# database after 5 consecutive reclamation cycles.# “expired-leases-processing”: {# “reclaim-timer-wait-time”: 10,# “flush-reclaimed-timer-wait-time”: 25,# “hold-reclaimed-time”: 3600,# “max-reclaim-leases”: 100,# “max-reclaim-time”: 250,# “unwarned-reclaim-cycles”: 5# },
# Addresses will be assigned with preferred and valid lifetimes# being 3000 and 4000, respectively. Client is told to start# renewing after 1000 seconds. If the server does not respond# after 2000 seconds since the lease was granted, client is supposed# to start REBIND procedure (emergency renewal that allows switching# to a different server). “preferred-lifetime”: 3000, “valid-lif免费云主机域名etime”: 4000, “renew-timer”: 1000, “rebind-timer”: 2000,
# The following list defines subnets. Uncomment to enable them. “subnet6”: [ { “subnet”: “2001:da8:XXXX:XXXX:25::/80”, “pools”: [ { “pool”: “2001:da8:XXXX:XXXX:25::/80” } ], “interface-id”:”vlan25″
},
{ “subnet”: “2001:da8:XXXX:XXXX:24::/80”, “pools”: [ { “pool”: “2001:da8:XXXX:XXXX:24::/80” } ], “interface”:”eno16777736″
}, { “subnet”: “2001:da8:XXXX:XXXX:26::/80”, “pools”: [ { “pool”: “2001:da8:XXXX:XXXX:26::/80” } ], “interface-id”:”vlan26″
},# { “subnet”: “2001:db8:3::/64”,# “pools”: [ { “pool”: “2001:db8:3::/80” } ] },# { “subnet”: “2001:db8:4::/64”,# “pools”: [ { “pool”: “2001:db8:4::/80” } ] } ]},
# DHCP DDNS configuration starts here.
# Logging configuration starts here. It tells Kea servers to store# all log messages (on severity INFO or more) in a file.# debuglevel variable is used on DEBUG level only.”Logging”:{ “loggers”: [ { “name”: “kea-dhcp4”, “output_options”: [ { “output”: “/var/log/kea-dhcp4.log” } ], “severity”: “INFO”, “debuglevel”: 0 }, { “name”: “kea-dhcp6”, “output_options”: [ { “output”: “/var/log/kea-dhcp6.log” } ], “severity”: “DEBUG”, “debuglevel”: 99 }, { “name”: “kea-dhcp-ddns”, “output_options”: [ { “output”: “/var/log/kea-ddns.log” } ], “severity”: “INFO”, “debuglevel”: 0 } ]}
}

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