git: b4174079576a - main - bridge.4: describe new MTU behaviour

The branch main has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=b4174079576aeb811f2aa854be2d32b703a21960

commit b4174079576aeb811f2aa854be2d32b703a21960
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2022-09-15 06:26:49 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2022-09-16 10:49:16 +0000

    bridge.4: describe new MTU behaviour
    
    1865ebfb12 changed if_bridge to have it change the MTU on newly added
    interfaces to match the if_bridge MTU, rather than rejecting them for
    having an incorrect MTU.
    
    Update the man page to reflect this, as pointed out by woodsb02.
    
    Reviewed by:    woodsb02
    Differential Revision:  https://reviews.freebsd.org/D36481
---
 share/man/man4/bridge.4 | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/share/man/man4/bridge.4 b/share/man/man4/bridge.4
index e193724928ca..e5313430b407 100644
--- a/share/man/man4/bridge.4
+++ b/share/man/man4/bridge.4
@@ -35,7 +35,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 17, 2021
+.Dd September 7, 2022
 .Dt IF_BRIDGE 4
 .Os
 .Sh NAME
@@ -127,7 +127,9 @@ in
 .Xr rc.conf 5 .
 .Pp
 The MTU of the first member interface to be added is used as the bridge MTU.
-All additional members are required to have exactly the same MTU value.
+All additional members will have their MTU changed to match.
+If the MTU of a bridge is changed after its creation, the MTU of all member
+interfaces is also changed to match.
 .Pp
 The TOE, TSO, TXCSUM and TXCSUM6 capabilities on all interfaces added to the
 bridge are disabled if any of the interfaces do not support/enable them.
@@ -511,4 +513,5 @@ Rapid Spanning Tree Protocol (RSTP) support was added by
 The
 .Nm
 driver currently supports only Ethernet and Ethernet-like (e.g., 802.11)
-network devices, with exactly the same interface MTU size as the bridge device.
+network devices, which can be configured with the same MTU size as the bridge
+device.