Centos 7 under IPV6 stateful DHCPV6 configuration

Yum Source Installation Kea

Yum Install Epel-release

Yum Install Kea

DEMON

PS aux| grep Kea

Rpm-qa Kea

View DHCPv6 default configuration

Cat/etc/kea/kea.conf

Start Kea-dhcpv6 and view the Kea startup process

Systemctl Start KEA-DHCP6

Systemctl Status KEA-DHCP6

Systemctl-l Status KEA-DHCP6

View the server packet interaction process through tcpdump

Tcpdump-i eth0-w Dhcp6.pcap

Shutting down the firewall

Systemctl Stop Firewalld.service

Note: You must turn off the firewall or cause the DHCPv6 assignment address to be issued.

Files used:

/var/lib/kea/kea-leases6.csv by default, the IPv6 address and device information of the terminal can be found, see the domain account MAC address and other information.

/var/log/kea-dhcp6.log I open the debug mode. You can view a log of the DHCP6 running status.

Centos 7 Modify DNS

Modify/etc/networkmanager/networkmanager.conf

[Main]

Plugins=ifcfg-rh

Dns=none

Manual modification/etc/resolv.conf

NameServer 114.114.114.114

NameServer 8.8.8.8

Server nic static IPv6 configuration:

[Email protected] kea]# vi/etc/sysconfig/network-scripts/ifcfg-eno16777736

Type=ethernet

Bootproto=static

Defroute=yes

Peerdns=yes

Peerroutes=yes

Ipv4_failure_fatal=no

Ipv6init=yes

Ipv6_autoconf=no

Ipv6_defroute=yes

Ipv6_peerdns=yes

Ipv6_peerroutes=yes

Ipv6_failure_fatal=no

name=eno16777736

uuid=03b35ca7-4678-48ca-ab46-5782367cd56a

device=eno16777736

Onboot=yes

ipaddr=x.x.x.x

gateway=x.x.x.x

netmask=x.x.x.x

ipvaddr=2001:da8:xxxx:xxxx:24::125

Ipv6_defaultgw=2001:da8:xxxx:xxxx:24::1

Ipv6addr=2001:da8:xxxx:xxxx:24::125/80

Kea-dhcpv6 configuration:

{

"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'll be reclaimed every seconds. Every 25

# seconds reclaimed leases, which has expired more than 3600

# seconds ago, would be removed. The limits for leases reclamation

# is leases or each MS for a single cycle. A warning message

# would be logged if there is 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'll be assigned with preferred and valid lifetimes

# Being and 4000, respectively. Client is told to start

# Renewing after seconds. If the server does not respond

# 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 logs 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",/Log on to the DEBUG level, you can view the assigned address information.

"DebugLevel": 99

},

{

"Name": "Kea-dhcp-ddns",

"Output_options": [

{

"Output": "/var/log/kea-ddns.log"

}

],

"Severity": "INFO",

"DebugLevel": 0

}

]

}

}

If you need DHCPv6 service in your network segment, you must open the following:

[Email protected] kea]# cat/etc/kea/kea.conf

# This was a basic configuration for the Kea DHCPv4 and DHCPV6 servers.

# Subnet declarations is commented out and no interfaces is listed.

# Therefore, the servers would not be listen or respond to any queries.

# The basic configuration must is 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'll be reclaimed every seconds. Every 25

# seconds reclaimed leases, which has expired more than 3600

# seconds ago, would be removed. The limits for leases reclamation

# is leases or each MS for a single cycle. A warning message

# would be logged if there is 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 A example of the simple subnet declaration. Uncomment to

# enable it. This was a list, denoted with [], of structure, denoted

# with {}. Each structure describes a, subnet and may

# several parameters. One of those parameters is ' pools ' 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'll be reclaimed every seconds. Every 25

# seconds reclaimed leases, which has expired more than 3600

# seconds ago, would be removed. The limits for leases reclamation

# is leases or each MS for a single cycle. A warning message

# would be logged if there is 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'll be assigned with preferred and valid lifetimes

# Being and 4000, respectively. Client is told to start

# Renewing after seconds. If the server does not respond

# 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: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 logs 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

}

]

}

}

This article is from the "It is not a thing" blog, please make sure to keep this source http://imccie.blog.51cto.com/4710872/1878466

Centos 7 under IPV6 stateful DHCPV6 configuration