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[#2422] add limits to the list of hook libraries in the ARM

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Andrei Pavel 2022-05-31 15:33:57 +03:00
parent aee7686354
commit 6cad049044
2 changed files with 16 additions and 3 deletions
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14
doc/sphinx/arm/hooks-limits.rst
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@ -28,9 +28,17 @@ it or the hook library configuration.
There are two ways to configure which packets get limited. One is through the client classes that are
initially assigned to the packet. In this case, the limit is configured in the user context
in the client class definition. Class rate limits are checked early in packet processing cycle
and is thus limited to those classes which are assigned to the packet via test expression and that
do not depend on host reservations, the special "BOOTP" or "KNOWN" classes, and is not marked with
"only-if-required".
and are thus limited to those classes which are assigned to the packet via test expression, that do
not depend on host reservations, the special "BOOTP" or "KNOWN" classes, and that are not marked
with "only-if-required".
.. note::
The limits hook library uses the name to identify a client class and the ID to identify a subnet.
Changing a test expression in a client class or the network range of a subnet while leaving the
name, or the ID respectively, unchanged will not reset the limit for the respective client class
or subnet and what counted towards the limit prior to the change, will continue to take effect.
To start over, consider changing the client class name or the subnet ID.
.. note::

5
doc/sphinx/arm/hooks.rst
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@ -466,6 +466,11 @@ loaded by the correct process per the table below.
| | customers |update aspects such as generating hostnames via expressions |
| | |and skipping DDNS updates for select clients. |
+-----------------+---------------+------------------------------------------------------------+
| Limits | ISC support | Kea servers ``kea-dhcp4`` and ``kea-dhcp6`` can use this |
| | customers | hook library to apply a limit to the rate at which packets |
| | | receive a response. The limit can be applied |
| | | per client class or per subnet. |
+-----------------+---------------+------------------------------------------------------------+
ISC hopes to see more hook libraries become available as time
progresses, developed both internally and externally. Since this list