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[#1548] Revised ddns-tuning v6 rules in ARM

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modified:   hooks-ddns-tuning.rst
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Thomas Markwalder 2022-04-12 11:56:46 -04:00
parent 5a91f37028
commit 49eeee7029
1 changed files with 16 additions and 7 deletions
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doc/sphinx/arm/hooks-ddns-tuning.rst
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@ -124,17 +124,26 @@ DHCPv6 host name generation
With this library installed the behavior for ``kea-dhcp6`` when forming host names in
response to a client query (e.g. SOLICIT, REQUEST, RENEW, REBIND) is as follows:
1. If a host name is supplied via a host reservation use it along with the DDNS
behavioral parameters to form the final host name. Goto step 3.
2. If the client supplied an FQDN option (option 39) use the domain name value
1. If the client supplied an FQDN option (option 39) use the domain name value
specified within it along with the DDNS behavioral parameters to form the final
host name. Goto step 3.
host name. Goto step 4.
3. If there is an ddns-tuning in-scope host name expression (either global or subnet),
2. If the client did not supply an FQDN but ddns-replace-client-name is either
``always`` or ``when-not-present``, then calculate the final form of the host
name and use it to create an outbound FQDN. Goto step 4.
3. If there is no outbound FQDN at this point, client name processing for this
packet stops. Without an outbound FQDN there is no way to communicate a host
name to the client.
4. If a host name is supplied via a host reservation use it along with the DDNS
behavioral parameters to form the final host name, and supersedes the FQDN value
calculated in steps 1 or 2.
5. If there is a ddns-tuning in-scope host name expression (either global or subnet),
calculate the host name using the expression. If the calculated value is not a fully
qualified name and there is an in-scope ddns-qualifying-suffix, append the suffix.
4. If value calculated by the hook is not an empty string and is different than the
6. If value calculated by the hook is not an empty string and is different than the
the host name formed in the prior steps (1 or 2), the calculated value becomes the
final host name.