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diff --git a/doc/sphinx/arm/hooks-subnet-cmds.rst b/doc/sphinx/arm/hooks-subnet-cmds.rst new file mode 100644 index 0000000..63cedfe --- /dev/null +++ b/doc/sphinx/arm/hooks-subnet-cmds.rst @@ -0,0 +1,1326 @@ +.. ischooklib:: libdhcp_subnet_cmds.so +.. _hooks-subnet-cmds: + +``libdhcp_subnet_cmds.so``: Subnet Commands to Manage Subnets and Shared Networks +================================================================================= + +This library offers commands used to query and manipulate subnet and shared network +configurations in Kea. These can be very useful in deployments +with a large number of subnets being managed by the DHCP servers, +when those subnets are frequently updated. The commands offer a lightweight +approach for manipulating subnets without needing to fully reconfigure +the server, and without affecting existing servers' configurations. An +ability to manage shared networks (listing, retrieving details, adding +new ones, removing existing ones, and adding subnets to and removing them from +shared networks) is also provided. + +.. note:: + + :ischooklib:`libdhcp_subnet_cmds.so` is available only to ISC customers with + a paid support contract. For more information on subscription options, + please complete the form at https://www.isc.org/contact. + +.. note:: + + This library can only be loaded by the :iscman:`kea-dhcp4` or :iscman:`kea-dhcp6` + process. + +The following commands are currently supported: + +- :isccmd:`subnet4-list` / :isccmd:`subnet6-list` - lists all configured subnets. + +- :isccmd:`subnet4-get` / :isccmd:`subnet6-get` - retrieves detailed information about a + specified subnet. + +- :isccmd:`subnet4-add` / :isccmd:`subnet6-add` - adds a new subnet into the server's + configuration. + +- :isccmd:`subnet4-update` / :isccmd:`subnet6-update` - updates (replaces) a single subnet in + the server's configuration. + +- :isccmd:`subnet4-del` / :isccmd:`subnet6-del` - removes a subnet from the server's + configuration. + +- :isccmd:`subnet4-delta-add` / :isccmd:`subnet6-delta-add` - updates (replaces) parts of a + single subnet in the server's configuration. + +- :isccmd:`subnet4-delta-del` / :isccmd:`subnet6-delta-del` - removes parts of a single subnet in + the server's configuration. + +- :isccmd:`network4-list` / :isccmd:`network6-list` - lists all configured shared networks. + +- :isccmd:`network4-get` / :isccmd:`network6-get` - retrieves detailed information about a + specified shared network. + +- :isccmd:`network4-add` / :isccmd:`network6-add` - adds a new shared network to the + server's configuration. + +- :isccmd:`network4-del` / :isccmd:`network6-del` - removes a shared network from the + server's configuration. + +- :isccmd:`network4-subnet-add` / :isccmd:`network6-subnet-add` - adds an existing subnet to + an existing shared network. + +- :isccmd:`network4-subnet-del` / :isccmd:`network6-subnet-del` - removes a subnet from + an existing shared network and demotes it to a plain subnet. + +.. isccmd:: subnet4-list +.. _command-subnet4-list: + +The ``subnet4-list`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to list all currently configured subnets. Each +subnet is returned with a subnet identifier and +subnet prefix. To retrieve +detailed information about the subnet, use the :isccmd:`subnet4-get` command. + +This command has a simple structure: + +:: + + { + "command": "subnet4-list" + } + +The list of subnets is returned in the following format: + +:: + + { + "result": 0, + "text": "2 IPv4 subnets found", + "arguments": { + "subnets": [ + { + "id": 10, + "subnet": "10.0.0.0/8" + }, + { + "id": 100, + "subnet": "192.0.2.0/24" + } + ] + } + } + +If no IPv4 subnets are found, an error code is returned along with the +error description. + +.. isccmd:: subnet6-list +.. _command-subnet6-list: + +The ``subnet6-list`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to list all currently configured subnets. Each +subnet is returned with a subnet identifier and +subnet prefix. To retrieve +detailed information about the subnet, use the :isccmd:`subnet6-get` command. + +This command has a simple structure: + +:: + + { + "command": "subnet6-list" + } + +The list of subnets is returned in the following format: + +:: + + { + "result": 0, + "text": "2 IPv6 subnets found", + "arguments": { + "subnets": [ + { + "id": 11, + "subnet": "2001:db8:1::/64" + }, + { + "id": 233, + "subnet": "3000::/16" + } + ] + } + } + +If no IPv6 subnets are found, an error code is returned along with the +error description. + +.. isccmd:: subnet4-get +.. _command-subnet4-get: + +The ``subnet4-get`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to retrieve detailed information about the +specified subnet. This command usually follows :isccmd:`subnet4-list`, +which is used to discover available subnets with their respective subnet +identifiers and prefixes. Any of those parameters can then be used in +:isccmd:`subnet4-get` to fetch subnet information: + +:: + + { + "command": "subnet4-get", + "arguments": { + "id": 10 + } + } + +or + +:: + + { + "command": "subnet4-get", + "arguments": { + "subnet": "10.0.0.0/8" + } + } + +If the subnet exists, the response will be similar to this: + +:: + + { + "result": 0, + "text": "Info about IPv4 subnet 10.0.0.0/8 (id 10) returned", + "arguments": { + "subnets": [ + { + "subnet": "10.0.0.0/8", + "id": 1, + "option-data": [ + { + ... + }, + ... + ], + ... + } + ] + } + } + +.. isccmd:: subnet6-get +.. _command-subnet6-get: + +The ``subnet6-get`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to retrieve detailed information about the +specified subnet. This command usually follows :isccmd:`subnet6-list`, +which is used to discover available subnets with their respective subnet +identifiers and prefixes. Any of those parameters can be then used in +:isccmd:`subnet6-get` to fetch subnet information: + +:: + + { + "command": "subnet6-get", + "arguments": { + "id": 11 + } + } + +or + +:: + + { + "command": "subnet6-get", + "arguments": { + "subnet": "2001:db8:1::/64" + } + } + +If the subnet exists, the response will be similar to this: + +:: + + { + "result": 0, + "text": "Info about IPv6 subnet 2001:db8:1::/64 (id 11) returned", + "arguments": { + "subnets": [ + { + "subnet": "2001:db8:1::/64", + "id": 1, + "option-data": [ + { + ... + }, + ... + ], + ... + } + ] + } + } + +.. isccmd:: subnet4-add +.. _command-subnet4-add: + +The ``subnet4-add`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to create and add a new subnet to the existing server +configuration. This operation has no impact on other subnets. The subnet +identifier must be specified and must be unique among all subnets. If +the identifier or a subnet prefix is not unique, an error is reported and +the subnet is not added. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet4-add`. The commands described in :ref:`hooks-host-cmds` should be used to +add, remove, and modify static reservations. + +:: + + { + "command": "subnet4-add", + "arguments": { + "subnet4": [ { + "id": 123, + "subnet": "10.20.30.0/24", + ... + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv4 subnet added", + "arguments": { + "subnet4": [ + { + "id": 123, + "subnet": "10.20.30.0/24" + } + ] + } + } + +.. isccmd:: subnet6-add +.. _command-subnet6-add: + +The ``subnet6-add`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to create and add a new subnet to the existing server +configuration. This operation has no impact on other subnets. The subnet +identifier must be specified and must be unique among all subnets. If +the identifier or a subnet prefix is not unique, an error is reported and +the subnet is not added. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet6-add`. The commands described in :ref:`hooks-host-cmds` should be used +to add, remove, and modify static reservations. + +:: + + { + "command": "subnet6-add", + "arguments": { + "subnet6": [ { + "id": 234, + "subnet": "2001:db8:1::/64", + ... + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv6 subnet added", + "arguments": { + "subnet6": [ + { + "id": 234, + "subnet": "2001:db8:1::/64" + } + ] + } + } + +It is recommended, but not mandatory, to specify the subnet ID. If not +specified, Kea will try to assign the next ``subnet-id`` value. This +automatic ID value generator is simple; it returns the previous +automatically assigned value, increased by 1. This works well, unless +a subnet is manually created with a larger value than one previously used. For +example, if :isccmd:`subnet4-add` is called five times, each without an ID, Kea will +assign IDs 1, 2, 3, 4, and 5 and it will work just fine. However, if +:isccmd:`subnet4-add` is called five times, with the first subnet having the +``subnet-id`` of value 3 and the remaining ones having no ``subnet-id``, the operation will +fail. The first command (with the explicit value) will use ``subnet-id`` 3; the +second command will create a subnet with and ID of 1; the third will use a +value of 2; and finally the fourth will have its ``subnet-id`` value +auto-generated as 3. However, since there is already a subnet with that +ID, the process will fail. + +The general recommendation is either never to use explicit values, so +that auto-generated values will always work; or always use explicit +values, so that auto-generation is never used. The two +approaches can be mixed only if the administrator understands how internal +automatic ``subnet-id`` generation works in Kea. + +.. note:: + + Subnet IDs must be greater than zero and less than 4294967295. + +.. isccmd:: subnet4-update +.. _command-subnet4-update: + +The ``subnet4-update`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to update (overwrite) a single subnet in the existing +server configuration. This operation has no impact on other subnets. The +subnet identifier is used to identify the subnet to replace; it must be +specified and must be unique among all subnets. The subnet prefix should +not be updated. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet4-update`. The commands described in :ref:`hooks-host-cmds` should be +used to update, remove, and modify static reservations. + +:: + + { + "command": "subnet4-update", + "arguments": { + "subnet4": [ { + "id": 123, + "subnet": "10.20.30.0/24", + ... + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv4 subnet updated", + "arguments": { + "subnet4": [ + { + "id": 123, + "subnet": "10.20.30.0/24" + } + ] + } + } + +As with other update commands, this command overwrites all the contents of the +entry. If the IPv4 subnet previously had a resource assigned to it, and the +:isccmd:`subnet4-update` command is missing the resource, it is deleted from the +server configuration. If an incremental update of the subnet is desired, then +this can be achieved with :isccmd:`subnet4-delta-add`. + +.. isccmd:: subnet6-update +.. _command-subnet6-update: + +The ``subnet6-update`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to update (overwrite) a single subnet in the existing +server configuration. This operation has no impact on other subnets. The +subnet identifier is used to identify the subnet to replace; it must be +specified and must be unique among all subnets. The subnet prefix should +not be updated. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet6-update`. The commands described in :ref:`hooks-host-cmds` should be +used to update, remove, and modify static reservations. + +:: + + { + "command": "subnet6-update", + "arguments": { + "subnet6": [ { + "id": 234, + "subnet": "2001:db8:1::/64", + ... + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv6 subnet updated", + "arguments": { + "subnet6": [ + { + "id": 234, + "subnet": "2001:db8:1::/64" + } + ] + } + } + +As with other update commands, this command overwrites all the contents of the +entry. If the IPv6 subnet previously had a resource assigned to it, and the +:isccmd:`subnet6-update` command is missing the resource, it is deleted from the +server configuration. If an incremental update of the subnet is desired, then +this can be achieved with :isccmd:`subnet6-delta-add`. + +.. isccmd:: subnet4-del +.. _command-subnet4-del: + +The ``subnet4-del`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to remove a subnet from the server's configuration. +This command has no effect on other configured subnets, but removing a +subnet does have certain implications. + +In most cases the server has assigned some leases to the clients +belonging to the subnet. The server may also be configured with static +host reservations which are associated with this subnet. The current +implementation of the :isccmd:`subnet4-del` command removes neither the leases nor +the host reservations associated with a subnet. This is the safest approach +because the server does not lose track of leases assigned to clients +from this subnet. However, removal of the subnet may still cause +configuration errors and conflicts. For example: after removal of the +subnet, the server administrator may update a new subnet with the ID +used previously for the removed subnet. This means that the existing +leases and static reservations will be in conflict with this new subnet. +Thus, we recommend that this command be used with extreme caution. + +This command can also be used to completely delete an IPv4 subnet that +is part of a shared network. To simply remove the subnet +from a shared network and keep the subnet configuration, use the +:isccmd:`network4-subnet-del` command instead. + +The command has the following structure: + +:: + + { + "command": "subnet4-del", + "arguments": { + "id": 123 + } + } + +A successful response may look like this: + +:: + + { + "result": 0, + "text": "IPv4 subnet 192.0.2.0/24 (id 123) deleted", + "arguments": { + "subnets": [ + { + "id": 123, + "subnet": "192.0.2.0/24" + } + ] + } + } + +.. isccmd:: subnet6-del +.. _command-subnet6-del: + +The ``subnet6-del`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to remove a subnet from the server's configuration. +This command has no effect on other configured subnets, but removing a +subnet does have certain implications. + +In most cases the server has assigned some leases to the clients +belonging to the subnet. The server may also be configured with static +host reservations which are associated with this subnet. The current +implementation of the :isccmd:`subnet6-del` command removes neither the leases nor +the host reservations associated with a subnet. This is the safest approach +because the server does not lose track of leases assigned to clients +from this subnet. However, removal of the subnet may still cause +configuration errors and conflicts. For example: after removal of the +subnet, the server administrator may add a new subnet with the ID used +previously for the removed subnet. This means that the existing leases +and static reservations will be in conflict with this new subnet. Thus, +we recommend that this command be used with extreme caution. + +This command can also be used to completely delete an IPv6 subnet that +is part of a shared network. To simply remove the subnet +from a shared network and keep the subnet configuration, use the +:isccmd:`network6-subnet-del` command instead. + +The command has the following structure: + +:: + + { + "command": "subnet6-del", + "arguments": { + "id": 234 + } + } + +A successful response may look like this: + +:: + + { + "result": 0, + "text": "IPv6 subnet 2001:db8:1::/64 (id 234) deleted", + "subnets": [ + { + "id": 234, + "subnet": "2001:db8:1::/64" + } + ] + } + +.. isccmd:: subnet4-delta-add +.. _command-subnet4-delta-add: + +The ``subnet4-delta-add`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to update a subnet by adding or overwriting its parts in +the existing server configuration. This operation has no impact on other +subnets. The subnet identifier is used to identify the subnet to update; it must +be specified and must be unique among all subnets. The subnet prefix should not +be updated. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet4-delta-add`. The commands described in :ref:`hooks-host-cmds` should +be used to update, remove, and modify static reservations. + +:: + + { + "command": "subnet4-delta-add", + "arguments": { + "subnet4": [ { + "valid-lifetime": 120, + "id": 123, + "subnet": "10.20.30.0/24", + "option-data": [ + { + "always-send": false, + "code": 3, + "csv-format": true, + "data": "192.0.3.1", + "name": "routers", + "space": "dhcp4" + } + ], + "pools": [ + { + "pool": "10.20.30.1-10.20.30.10", + "option-data": [ + { + "always-send": false, + "code": 4, + "csv-format": true, + "data": "192.0.4.1", + "name": "time-servers", + "space": "dhcp4" + } + ] + } + ] + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv4 subnet updated", + "arguments": { + "subnet4": [ + { + "id": 123, + "subnet": "10.20.30.0/24" + } + ] + } + } + +The command updates subnet "10.20.30.0/24" with id 123 by changing the valid +lifetime, adding or changing the subnet level option 3 ("routers"), by adding +or changing the pool "10.20.30.1-10.20.30.10" and by adding or changing the pool +level option 4 ("time-servers"). + +.. isccmd:: subnet6-delta-add +.. _command-subnet6-delta-add: + +The ``subnet6-delta-add`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to update a subnet by adding or overwriting its parts in +the existing server configuration. This operation has no impact on other +subnets. The subnet identifier is used to identify the subnet to update; it must +be specified and must be unique among all subnets. The subnet prefix should not +be updated. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet6-delta-add`. The commands described in :ref:`hooks-host-cmds` should +be used to update, remove, and modify static reservations. + +:: + + { + "command": "subnet6-delta-add", + "arguments": { + "subnet6": [ { + "valid-lifetime": 120, + "id": 243, + "subnet": "2001:db8:1::/64", + "option-data": [ + { + "always-send": false, + "code": 23, + "csv-format": true, + "data": "3000::3:1", + "name": "dns-servers", + "space": "dhcp6" + } + ], + "pd-pools": [ + { + "prefix": "2001:db8:2::", + "prefix-len": 48, + "delegated-len": 64, + "option-data": [ + { + "always-send": false, + "code": 22, + "csv-format": true, + "data": "3000::4:1", + "name": "sip-server-addr", + "space": "dhcp6" + } + ] + } + ], + "pools": [ + { + "pool": "2001:db8:1::1-2001:db8:1::10", + "option-data": [ + { + "always-send": false, + "code": 31, + "csv-format": true, + "data": "3000::5:1", + "name": "sntp-servers", + "space": "dhcp6" + } + ] + } + ] + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv6 subnet updated", + "arguments": { + "subnet6": [ + { + "id": 234, + "subnet": "2001:db8:1::/64" + } + ] + } + } + +The command updates subnet "2001:db8:1::/64" with id 243 by changing the valid +lifetime, adding or changing the subnet level option 23 ("dns-servers"), by +adding or changing the pool "2001:db8:1::1-2001:db8:1::10", by adding or +changing the pool level option 31 ("sntp-servers"), by adding or changing the +pd-pool "2001:db8:2::" with prefix-len 48 and by adding or changing the pd-pool +level option 22 ("sip-server-addr"). + +.. isccmd:: subnet4-delta-del +.. _command-subnet4-delta-del: + +The ``subnet4-delta-del`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to update a subnet by removing its parts in the existing +server configuration. This operation has no impact on other subnets. +The subnet identifier is used to identify the subnet to update; it must be +specified and must be unique among all subnets. The subnet prefix should not be +updated. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet4-delta-del`. The commands described in :ref:`hooks-host-cmds` should +be used to update, remove, and modify static reservations. + +The command is flexible and can delete the part of the subnet by either +specifying the entire object that needs to be deleted, or just the keys +identifying the respective object. The address pools are identified by the +'pool' parameter, the options are identified by the 'name' or 'code' and +'space' parameters. The 'space' parameter can be omitted if the option belongs +to the default 'dhcp4' space. + +:: + + { + "command": "subnet4-delta-del", + "arguments": { + "subnet4": [ { + "valid-lifetime": 0, + "id": 123, + "subnet": "10.20.30.0/24", + "option-data": [ + { "name": "routers" } + ], + "pools": [ + { + "option-data": [ + { "code": 4 } + ], + "pool": "10.20.30.11-10.20.30.20" + }, + { + "pool": "10.20.30.21-10.20.30.30" + } + ] + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv4 subnet updated", + "arguments": { + "subnet4": [ + { + "id": 123, + "subnet": "10.20.30.0/24" + } + ] + } + } + +The command updates subnet "10.20.30.0/24" with id 123 by removing the valid +lifetime, removing the subnet level option 3 ("routers"), by removing the pool +"10.20.30.21-10.20.30.30" and by removing the pool level option 4 +("time-servers") in pool "10.20.30.11-10.20.30.20". +The scalar values don't need to match what is configured, but still need to be +present to maintain a valid json structure and to be a valid value to be able to +be parsed. + +.. isccmd:: subnet6-delta-del +.. _command-subnet6-delta-del: + +The ``subnet6-delta-del`` Command +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This command is used to update a subnet by removing its parts in the existing +server configuration. This operation has no impact on other subnets. +The subnet identifier is used to identify the subnet to update; it must be +specified and must be unique among all subnets. The subnet prefix should not be +updated. + +The subnet information within this command has the same structure as the +subnet information in the server configuration file, with the exception +that static host reservations cannot be specified within +:isccmd:`subnet6-delta-del`. The commands described in :ref:`hooks-host-cmds` should +be used to update, remove, and modify static reservations. + +The command is flexible and can delete the part of the subnet by either +specifying the entire object that needs to be deleted, or just the keys +identifying the respective object. The address pools are identified by the +'pool' parameter, the prefix pools are identified by the "prefix", "prefix-len" +and "delegated-len" parameters, the options are identified by the 'name' or +'code' and 'space' parameters. The 'space' parameter can be omitted if the +option belongs to the default 'dhcp6' space. + +.. code-block:: json + + { + "command": "subnet6-delta-del", + "arguments": { + "subnet6": [ { + "valid-lifetime": 0, + "id": 234, + "subnet": "2001:db8:1::/64", + "option-data": [ + { "name": "dns-servers" } + ], + "pd-pools": [ + { + "prefix": "2001:db8:3::", + "prefix-len": 48, + "delegated-len": 64, + "option-data": [ + { "code": 22 } + ] + }, + { + "prefix": "2001:db8:4::", + "prefix-len": 48, + "delegated-len": 64 + } + ], + "pools": [ + { + "option-data": [ + { "code": 31 } + ], + "pool": "2001:db8:1::11-2001:db8:1::20" + }, + { + "pool": "2001:db8:1::21-2001:db8:1::30" + } + ] + } ] + } + } + +The response to this command has the following structure: + +:: + + { + "result": 0, + "text": "IPv6 subnet updated", + "arguments": { + "subnet6": [ + { + "id": 234, + "subnet": "2001:db8:1::/64" + } + ] + } + } + +The command updates subnet "2001:db8:1::/64" with id 243 by removing the valid +lifetime, removing the subnet level option 23 ("dns-servers"), by removing the +pool "2001:db8:1::21-2001:db8:1::30", by removing the pool level option 31 +("sntp-servers") in pool "2001:db8:1::11-2001:db8:1::20", by removing the +pd-pool "2001:db8:4::" with prefix-len 48, by removing the pd-pool level option +22 ("sip-server-addr") in pd-pool "2001:db8:3::" with prefix-len 48. +The scalar values don't need to match what is configured, but still need to be +present to maintain a valid json structure and to be a valid value to be able to +be parsed. + +.. isccmd:: network4-list +.. _command-network4-list: + +.. isccmd:: network6-list +.. _command-network6-list: + +The ``network4-list``, ``network6-list`` Commands +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are used to retrieve the full list of currently configured +shared networks. The list contains only very basic information about +each shared network. If more details are needed, please use +:isccmd:`network4-get` or :isccmd:`network6-get` to retrieve all information +available. This command does not require any parameters and its +invocation is very simple: + +:: + + { + "command": "network4-list" + } + +An example response for :isccmd:`network4-list` looks as follows: + +:: + + { + "arguments": { + "shared-networks": [ + { "name": "floor1" }, + { "name": "office" } + ] + }, + "result": 0, + "text": "2 IPv4 network(s) found" + } + +The :isccmd:`network6-list` command uses exactly the same syntax for both the +command and the response. + +.. isccmd:: network4-get +.. _command-network4-get: + +.. isccmd:: network6-get +.. _command-network6-get: + +The ``network4-get``, ``network6-get`` Commands +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are used to retrieve detailed information about shared +networks, including subnets that are currently part of a given network. +Both commands take one mandatory parameter, ``name``, which specifies the +name of the shared network. An example command to retrieve details about +an IPv4 shared network with the name "floor13" looks as follows: + +:: + + { + "command": "network4-get", + "arguments": { + "name": "floor13" + } + } + +An example response could look as follows: + +:: + + { + "result": 0, + "text": "Info about IPv4 shared network 'floor13' returned", + "arguments": { + "shared-networks": [ + { + "match-client-id": true, + "name": "floor13", + "option-data": [ ], + "rebind-timer": 90, + "relay": { + "ip-address": "0.0.0.0" + }, + "renew-timer": 60, + # "reservation-mode": "all", + # It is replaced by the "reservations-global", + # "reservations-in-subnet", and "reservations-out-of-pool" + # parameters. + # Specify if the server should look up global reservations. + "reservations-global": false, + # Specify if the server should look up in-subnet reservations. + "reservations-in-subnet": true, + # Specify if the server can assume that all reserved addresses + # are out-of-pool. + "reservations-out-of-pool": false, + "subnet4": [ + { + "subnet": "192.0.2.0/24", + "id": 5, + ... + # many other subnet-specific details here + }, + { + "id": 6, + "subnet": "192.0.3.0/31", + ... + # many other subnet-specific details here + } + ], + "valid-lifetime": 120 + } + ] + } + } + +The actual response contains many additional fields that are +omitted here for clarity. The response format is exactly the same as +used in :isccmd:`config-get`, just limited to returning the shared network's +information. + +.. isccmd:: network4-add +.. _command-network4-add: + +.. isccmd:: network6-add +.. _command-network6-add: + +The ``network4-add``, ``network6-add`` Commands +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are used to add a new shared network, which must +have a unique name. This command requires one parameter, +``shared-networks``, which is a list and should contain exactly one +entry that defines the network. The only mandatory element for a network +is its name. Although it does not make operational sense, it is possible +to add an empty shared network that does not have any subnets in it. +That is allowed for testing purposes, but having empty networks (or networks with +only one subnet) is discouraged in production environments. For details +regarding syntax, see :ref:`shared-network4` and +:ref:`shared-network6`. + +.. note:: + + As opposed to parameter inheritance during the processing of a full new + configuration, this command does not fully handle parameter inheritance. + Any missing parameters will be filled with default values, rather + than inherited from the global scope. + +An example that showcases how to add a new IPv4 shared network looks as +follows: + +:: + + { + "command": "network4-add", + "arguments": { + "shared-networks": [ { + "name": "floor13", + "subnet4": [ + { + "id": 100, + "pools": [ { "pool": "192.0.2.2-192.0.2.99" } ], + "subnet": "192.0.2.0/24", + "option-data": [ + { + "name": "routers", + "data": "192.0.2.1" + } + ] + }, + { + "id": 101, + "pools": [ { "pool": "192.0.3.2-192.0.3.99" } ], + "subnet": "192.0.3.0/24", + "option-data": [ + { + "name": "routers", + "data": "192.0.3.1" + } + ] + } ] + } ] + } + } + +Assuming there was no shared network with a name "floor13" and no subnets +with IDs 100 and 101 previously configured, the command will be +successful and will return the following response: + +:: + + { + "arguments": { + "shared-networks": [ { "name": "floor13" } ] + }, + "result": 0, + "text": "A new IPv4 shared network 'floor13' added" + } + +The :isccmd:`network6-add` command uses the same syntax for both the query and the +response. However, there are some parameters that are IPv4-only (e.g. +``match-client-id``) and some that are IPv6-only (e.g. ``interface-id``). The same +applies to subnets within the network. + +.. isccmd:: network4-del +.. _command-network4-del: + +.. isccmd:: network6-del +.. _command-network6-del: + +The ``network4-del``, ``network6-del`` Commands +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are used to delete existing shared networks. Both +commands take exactly one parameter, ``name``, that specifies the name of +the network to be removed. An example invocation of the :isccmd:`network4-del` +command looks as follows: + +:: + + { + "command": "network4-del", + "arguments": { + "name": "floor13" + } + } + +Assuming there was such a network configured, the response will look +similar to the following: + +:: + + { + "arguments": { + "shared-networks": [ + { + "name": "floor13" + } + ] + }, + "result": 0, + "text": "IPv4 shared network 'floor13' deleted" + } + +The :isccmd:`network6-del` command uses exactly the same syntax for both the +command and the response. + +If there are any subnets belonging to the shared network being deleted, +they will be demoted to a plain subnet. There is an optional parameter +called ``subnets-action`` that, if specified, takes one of two possible +values: ``keep`` (which is the default) and ``delete``. It controls +whether the subnets are demoted to plain subnets or removed. An example +usage in the :isccmd:`network6-del` command that deletes the shared network and all +subnets in it could look as follows: + +:: + + { + "command": "network4-del", + "arguments": { + "name": "floor13", + "subnets-action": "delete" + } + } + +Alternatively, to completely remove the subnets, it is possible to use the +:isccmd:`subnet4-del` or :isccmd:`subnet6-del` commands. + +.. isccmd:: network4-subnet-add +.. _command-network4-subnet-add: + +.. isccmd:: network6-subnet-add +.. _command-network6-subnet-add: + +The ``network4-subnet-add``, ``network6-subnet-add`` Commands +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are used to add existing subnets to existing shared +networks. There are several ways to add a new shared network. The system +administrator can add the whole shared network at once, either by +editing a configuration file or by calling the :isccmd:`network4-add` or +:isccmd:`network6-add` command with the desired subnets in it. This approach +works well for completely new shared subnets. However, there may be +cases when an existing subnet is running out of addresses and needs to +be extended with additional address space; in other words, another subnet +needs to be added on top of it. For this scenario, a system administrator +can use :isccmd:`network4-add` or :isccmd:`network6-add`, and then add an existing +subnet to this newly created shared network using +:isccmd:`network4-subnet-add` or :isccmd:`network6-subnet-add`. + +The :isccmd:`network4-subnet-add` and +:isccmd:`network6-subnet-add` commands take +two parameters: ``id``, which is an integer and specifies the ID of +an existing subnet to be added to a shared network; and ``name``, which +specifies the name of the shared network to which the subnet will be added. The +subnet must not belong to any existing network; to +reassign a subnet from one shared network to another, use the +:isccmd:`network4-subnet-del` or +:isccmd:`network6-subnet-del` command commands first. + +An example invocation of the :isccmd:`network4-subnet-add` command looks as +follows: + +:: + + { + "command": "network4-subnet-add", + "arguments": { + "name": "floor13", + "id": 5 + } + } + +Assuming there is a network named "floor13", and there is a subnet with +``subnet-id`` 5 that is not a part of the existing network, the command will +return a response similar to the following: + +:: + + { + "result": 0, + "text": "IPv4 subnet 10.0.0.0/8 (id 5) is now part of shared network 'floor13'" + } + +The :isccmd:`network6-subnet-add` command uses exactly the same syntax for both the +command and the response. + +.. note:: + + As opposed to parameter inheritance during the processing of a full new + configuration or when adding a new shared network with new subnets, + this command does not fully handle parameter inheritance. + Any missing parameters will be filled with default values, rather + than inherited from the global scope or from the shared network. + +.. isccmd:: network4-subnet-del +.. _command-network4-subnet-del: + +.. isccmd:: network6-subnet-del +.. _command-network6-subnet-del: + +The ``network4-subnet-del``, ``network6-subnet-del`` Commands +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are used to remove a subnet that is part of an existing +shared network and demote it to a plain, stand-alone subnet. +To remove a subnet completely, use the :isccmd:`subnet4-del` or :isccmd:`subnet6-del` +commands instead. The :isccmd:`network4-subnet-del` and +:isccmd:`network6-subnet-del` commands take two parameters: ``id``, which is +an integer and specifies the ID of an existing subnet to be removed from +a shared network; and ``name``, which specifies the name of the shared +network from which the subnet will be removed. + +An example invocation of the :isccmd:`network4-subnet-del` command looks as +follows: + +:: + + { + "command": "network4-subnet-del", + "arguments": { + "name": "floor13", + "id": 5 + } + } + +Assuming there was a subnet with ``subnet-id`` 5, that was part of a +shared network named "floor13", the response would look similar to the +following: + +:: + + { + "result": 0, + "text": "IPv4 subnet 10.0.0.0/8 (id 5) is now removed from shared network 'floor13'" + } + +The :isccmd:`network6-subnet-del` command uses exactly the same syntax for both the +command and the response. |