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-rw-r--r--website/content/en/releases/15.0R/relnotes.adoc4
-rw-r--r--website/content/en/releases/15.1R/relnotes.adoc4
2 files changed, 8 insertions, 0 deletions
diff --git a/website/content/en/releases/15.0R/relnotes.adoc b/website/content/en/releases/15.0R/relnotes.adoc
index 14611ba001..d175b2f5b2 100644
--- a/website/content/en/releases/15.0R/relnotes.adoc
+++ b/website/content/en/releases/15.0R/relnotes.adoc
@@ -1485,6 +1485,10 @@ Kernel compatibility code supporting man:ipfw[8] binaries from FreeBSD 7 and 8 h
gitref:660255be1ed9[repository=src]
{{< sponsored "The FreeBSD Foundation" >}}
+The stable MAC address generated for man:if_bridge[4], man:if_epair[4], and other interfaces will change as of 15.0 due to a critical flaw in the implementation that resulted in a high chance of collisions and some generated addresses outside of the expected OUI.
+If the previous MAC address needs to be retained for, e.g., DHCP leases, then care must be taken to persist the existing MAC address, such as with `ifconfig_bridgeN="... ether aa:bb:cc:dd:ee:ff"` in man:rc.conf[5].
+gitref:604d34c23f77[repository=src]
+
[[network-protocols]]
=== Network Protocols
diff --git a/website/content/en/releases/15.1R/relnotes.adoc b/website/content/en/releases/15.1R/relnotes.adoc
index 25a0efc504..b90562d17c 100644
--- a/website/content/en/releases/15.1R/relnotes.adoc
+++ b/website/content/en/releases/15.1R/relnotes.adoc
@@ -774,6 +774,10 @@ gitref:9657c50cdd77[repository=src].
The support for RFC 7217 stable IPv6 address generation via a new ifconfig 'stableaddr' flag and associated sysctls has been added. The feature is disabled by default, preserving existing behavior. The man:ifconfig[8] manual page is updated with documentation.
gitref:865e0b20ca3c[repository=src].
+The stable MAC address generated for man:if_bridge[4], man:if_epair[4], and other interfaces will change as of 15.0 due to a critical flaw in the implementation that resulted in a high chance of collisions and some generated addresses outside of the expected OUI.
+If the previous MAC address needs to be retained for, e.g., DHCP leases, then care must be taken to persist the existing MAC address, such as with `ifconfig_bridgeN="... ether aa:bb:cc:dd:ee:ff"` in man:rc.conf[5].
+gitref:604d34c23f77[repository=src]
+
[[wireless-networking]]
=== Wireless Networking