networking: Correctly set MTU on all bridges

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/udev/network-hotplug-bridges b/config/udev/network-hotplug-bridges
index 4b8764598d1d55e6339cf52836483b1f1b1fccb1..9fded1fd030194e84f3c53101f56760f5fdcf129 100644 (file)
--- a/config/udev/network-hotplug-bridges
+++ b/config/udev/network-hotplug-bridges
@@ -80,11 +80,17 @@ MODE="$(get_value "${ZONE}_MODE")"
 
 # The name of the virtual bridge
 BRIDGE="$(get_value "${ZONE}_DEV")"
+MTU="$(get_value "${ZONE}_MTU")"
 STP="$(get_value "${ZONE}_STP")"
 STP_PRIORITY="$(get_value "${ZONE}_STP_PRIORITY")"
 
 case "${MODE}" in
        bridge)
+               # Set default MTU if nothing is set
+               if [ -z "${MTU}" ]; then
+                       MTU=1500
+               fi
+
                # We need to check if $STP_PRIORITY has a valid value if not set it
                if [ -z "${STP_PRIORITY}" ]; then
                        STP_PRIORITY=16384
@@ -95,7 +101,7 @@ case "${MODE}" in
 
                # We need to create the bridge if it doesn't exist, yet
                if [ ! -d "/sys/class/net/${BRIDGE}" ]; then
-                       ip link add "${BRIDGE}" address "${ADDRESS}" type bridge \
+                       ip link add "${BRIDGE}" address "${ADDRESS}" mtu "${MTU}" type bridge \
                                $([ "${STP}" = "on" ] && echo "stp_state 1  priority ${STP_PRIORITY}" )
                        #ip link set "${BRIDGE}" up
                fi
@@ -105,6 +111,9 @@ case "${MODE}" in
                        iw dev "${INTERFACE}" set type __ap
                fi
 
+               # Attempt to set the MTU
+               ip link set dev "${INTERFACE}" mtu "${MTU}"
+
                # Attach the physical device
                logger "Attach ${INTERFACE} to ${BRIDGE}"
                ip link set dev "${INTERFACE}" master "${BRIDGE}"