When containers are connected to a OVS bridge and tunnels are created, it makese sense to reduce the MTU of the interafce.
Reported-by: Aurélien Poulai <[email protected]> Signed-off-by: Gurucharan Shetty <[email protected]> --- AUTHORS | 1 + INSTALL.Docker.md | 6 +++--- utilities/ovs-docker | 15 ++++++++++++--- 3 files changed, 16 insertions(+), 6 deletions(-) diff --git a/AUTHORS b/AUTHORS index 5178b43..574fba5 100644 --- a/AUTHORS +++ b/AUTHORS @@ -213,6 +213,7 @@ Anuprem Chalvadi [email protected] Ariel Tubaltsev [email protected] Arkajit Ghosh [email protected] Atzm Watanabe [email protected] +Aurélien Poulain [email protected] Bastian Blank [email protected] Ben Basler [email protected] Bob Ball [email protected] diff --git a/INSTALL.Docker.md b/INSTALL.Docker.md index b505a9b..9e14043 100644 --- a/INSTALL.Docker.md +++ b/INSTALL.Docker.md @@ -55,12 +55,12 @@ and then attaches it to the Open vSwitch bridge 'br-int'. This is done by creating a veth pair. One end of the interface becomes 'eth1' inside the container and the other end attaches to 'br-int'. -The script also lets one to add IP address, MAC address and Gateway address to -the interface. e.g.: +The script also lets one to add IP address, MAC address, Gateway address and +MTU for the interface. e.g.: ``` % ovs-docker add-port br-int eth1 $CONTAINER_ID --ipaddress=192.168.1.2/24 \ ---macaddress=a2:c3:0d:49:7f:f8 --gateway=192.168.1.1 +--macaddress=a2:c3:0d:49:7f:f8 --gateway=192.168.1.1 --mtu=1450 ``` * A previously added network interface can be deleted. e.g.: diff --git a/utilities/ovs-docker b/utilities/ovs-docker index 12c3246..43cea54 100755 --- a/utilities/ovs-docker +++ b/utilities/ovs-docker @@ -86,6 +86,10 @@ add_port () { GATEWAY=`expr X"$1" : 'X[^=]*=\(.*\)'` shift ;; + --mtu=*) + MTU=`expr X"$1" : 'X[^=]*=\(.*\)'` + shift + ;; *) echo >&2 "$UTIL add-port: unknown option \"$1\"" exit 1 @@ -137,6 +141,10 @@ add_port () { ip netns exec "$PID" ip link set dev "${PORTNAME}_c" name "$INTERFACE" ip netns exec "$PID" ip link set "$INTERFACE" up + if [ -n "$MTU" ]; then + ip netns exec "$PID" ip link set dev "$INTERFACE" mtu "$MTU" + fi + if [ -n "$ADDRESS" ]; then ip netns exec "$PID" ip addr add "$ADDRESS" dev "$INTERFACE" fi @@ -216,14 +224,15 @@ usage: ${UTIL} COMMAND Commands: add-port BRIDGE INTERFACE CONTAINER [--ipaddress="ADDRESS"] [--gateway=GATEWAY] [--macaddress="MACADDRESS"] + [--mtu=MTU] Adds INTERFACE inside CONTAINER and connects it as a port in Open vSwitch BRIDGE. Optionally, sets ADDRESS on INTERFACE. ADDRESS can include a '/' to represent network - prefix length. Optionally, sets a GATEWAY and a MACADDRESS. - e.g.: + prefix length. Optionally, sets a GATEWAY, MACADDRESS + and MTU. e.g.: ${UTIL} add-port br-int eth1 c474a0e2830e --ipaddress=192.168.1.2/24 --gateway=192.168.1.1 - --macaddress="a2:c3:0d:49:7f:f8" + --macaddress="a2:c3:0d:49:7f:f8" --mtu=1450 del-port BRIDGE INTERFACE CONTAINER Deletes INTERFACE inside CONTAINER and removes its connection to Open vSwitch BRIDGE. e.g.: -- 1.9.1 _______________________________________________ dev mailing list [email protected] http://openvswitch.org/mailman/listinfo/dev
