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net: disallow MTU changes on bridge member interfaces

Description

net: disallow MTU changes on bridge member interfaces

if_bridge member interfaces should always have the same MTU as the
bridge itself, so disallow MTU changes on interfaces that are part of an
if_bridge.

Reviewed by: donner
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31304

Details

Provenance
kpAuthored on Jul 26 2021, 10:18 AM
Reviewer
donner
Differential Revision
D31304: net: disallow MTU changes on bridge member interfaces
Parents
R10:6e439506408d: bridge tests: test changing the bridge MTU
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