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
This commit is contained in:
Kristof Provost 2022-09-15 08:26:49 +02:00
parent 8f98a937ed
commit b417407957

View File

@ -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.