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