Shulou(Shulou.com)06/01 Report--

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 process of server packet interaction through tcpdump

Tcpdump-I eth0-w dhcp6.pcap

Turn off the firewall

Systemctl stop firewalld.service

Note: the firewall must be turned off or the dhcpv6 assigned address cannot be sent.

Files used:

/ var/lib/kea/kea-leases6.csv stores the ipv6 address and the device information of the terminal by default, and you can view the domain account mac address and other information.

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

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:

[root@localhost 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 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":

# "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", / log is opened to the debug level, and 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 IP address range, you need to activate the following:

[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":

# "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 Universe 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":

# "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: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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