From 890316df4cfa1440c6e5d4d26c8eba721de7fc27 Mon Sep 17 00:00:00 2001 From: Alexandru Avadanii Date: Mon, 13 Aug 2018 19:10:50 +0200 Subject: [jump] Enable jumbo frames for vnet devices By default, vnet devices have a MTU of 1500 on the host side, causing issue with larger packets traversing the bridges between guest VMs when guest VMs have jumbo frames enabled. JIRA: FUEL-336 JIRA: FUEL-367 JIRA: FUEL-382 [1] http://linuxaleph.blogspot.com/2013/01/ how-to-network-jumbo-frames-to-kvm-guest.html [2] https://packetpushers.net/udev/ Change-Id: I941ac9cf764e3b3fa2d6463be5363b5459775f29 Signed-off-by: Alexandru Avadanii --- ci/deploy.sh | 1 + mcp/scripts/lib.sh | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/ci/deploy.sh b/ci/deploy.sh index 40176073d..07cde2613 100755 --- a/ci/deploy.sh +++ b/ci/deploy.sh @@ -293,6 +293,7 @@ else "${virtual_nodes[@]}" create_networks "${OPNFV_BRIDGES[@]}" do_sysctl_cfg + do_udev_cfg create_vms "${STORAGE_DIR}" "${virtual_nodes_data}" "${OPNFV_BRIDGES[@]}" update_mcpcontrol_network start_vms "${virtual_nodes[@]}" diff --git a/mcp/scripts/lib.sh b/mcp/scripts/lib.sh index 4e4f36908..c566cc993 100644 --- a/mcp/scripts/lib.sh +++ b/mcp/scripts/lib.sh @@ -546,6 +546,13 @@ function wait_for { ) } +function do_udev_cfg { + local _conf='/etc/udev/rules.d/99-opnfv-fuel-vnet-mtu.rules' + # http://linuxaleph.blogspot.com/2013/01/how-to-network-jumbo-frames-to-kvm-guest.html + echo 'SUBSYSTEM=="net", ACTION=="add", KERNEL=="vnet*", RUN+="/sbin/ip link set mtu 9000 dev '"'"%k"'"'"' |& sudo tee "${_conf}" + sudo udevadm control --reload || true +} + function do_sysctl_cfg { local _conf='/etc/sysctl.d/99-opnfv-fuel-bridge.conf' # https://wiki.libvirt.org/page/Net.bridge.bridge-nf-call_and_sysctl.conf -- cgit 1.2.3-korg