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Diffstat (limited to 'devstack/settings')
| -rw-r--r-- | devstack/settings | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/devstack/settings b/devstack/settings index 9783efdd6..cafa85384 100644 --- a/devstack/settings +++ b/devstack/settings @@ -9,4 +9,8 @@ source $DEST/ironic/devstack/common_settings local_mtu=$(ip link show | sed -ne 's/.*mtu \([0-9]\+\).*/\1/p' | sort -n | head -1) # 50 bytes is overhead for vxlan (which is greater than GRE # allowing us to use either overlay option with this MTU. -PUBLIC_BRIDGE_MTU=${OVERRIDE_PUBLIC_BRIDGE_MTU:-$((local_mtu - 50))} +# However, if traffic is flowing over IPv6 tunnels, then +# The overhead is essentially another 100 bytes. In order to +# handle both cases, lets go ahead and drop the maximum by +# 100 bytes. +PUBLIC_BRIDGE_MTU=${OVERRIDE_PUBLIC_BRIDGE_MTU:-$((local_mtu - 100))} |