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mpm: deactivate Duplicate Address Detection (DAD) on int0 interface

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Starting from systemd v245, Duplicate Address Detection (DAD) is automatically
enabled for static IPv4 addresses if the IP address is a link local address.
DuplicateAddressDetection=none (or DuplicateAddressDetection=true for historical
reasons) deactivates this.

Important notes on compatibility:
- systemd v243.2 (Yocto release zeus) does not support DuplicateAddressDetection=none
  and errors out without applying the IPv4 address -> use the historical
  parameter DuplicateAddressDetection=true to remain backward compatibility
- systemd v250.5 (Yocto release kirkstone) ignores the DuplicateAddressDetection=none
  (or DuplicateAddressDetection=true) parameter for link local addresses and enables
  DAD unconditionally. This is fixed by commit a9efd16090baee492e9dd9ae832b5b548e7c6fcf
  ("network: do not enable IPv4 ACD for IPv4 link-local address if ACD is disabled explicitly")
  which is not part of default Yocto systemd v250.5. In meta-ettus we have applied
  the patch so that the DuplicateAddressDetection=none (or DuplicateAddressDetection=true)
  parameter is honored for link local addresses
This commit is contained in:
Joerg Hofrichter 2024-05-28 15:58:38 +02:00
parent aedb8ac79f
commit f077a17602
1 changed files with 6 additions and 1 deletions
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7
mpm/systemd/network/int0.network
View File

@ -2,8 +2,13 @@
Name=int0
[Network]
Address=169.254.0.1/24
IPForward=ipv4
[Address]
Address=169.254.0.1/24
# The setting actually means DuplicateAddressDetection=none. We use the old flag here
# on purpose to remain backward compatibility with systemd v243.2 (Yocto release zeus)
DuplicateAddressDetection=true
[Link]
MTUBytes=9000