diff options
| author | nickcooper-zhangtonghao <nic@opencloud.tech> | 2016-12-11 20:48:57 -0800 |
|---|---|---|
| committer | Ben Pfaff <blp@ovn.org> | 2016-12-12 17:07:48 -0800 |
| commit | 06ca9597a63ea109d1e66ba09c9a28b56f9df6c9 (patch) | |
| tree | f0d9090273db275e85d76fec02018053b8ac0dd9 /vswitchd | |
| parent | 56edfb185bd03910d95e21eeb0f1a9cc5ed3fafd (diff) | |
| download | openvswitch-06ca9597a63ea109d1e66ba09c9a28b56f9df6c9.tar.gz | |
vswitch.xml: Document reasonable range for MTU.
According to RFC 791, every internet module must be
able to forward a datagram of 68 octets without further
fragmentation. This is because an internet header may
be up to 60 octets, and the minimum fragment is 8 octets.
The maximum size of IP packets is 65535 bytes. The range
of MTU values allowes for the MTU configuration parameter
is 68 to 65535.
Signed-off-by: nickcooper-zhangtonghao <nic@opencloud.tech>
[blp@ovn.org changed this to just a documentation patch]
Signed-off-by: Ben Pfaff <blp@ovn.org>
Diffstat (limited to 'vswitchd')
| -rw-r--r-- | vswitchd/vswitch.xml | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml index d10fc1def..b4af5a58e 100644 --- a/vswitchd/vswitch.xml +++ b/vswitchd/vswitch.xml @@ -2396,6 +2396,12 @@ </p> <p> + RFC 791 requires every internet module to be able to forward a + datagram of 68 octets without further fragmentation. The maximum + size of an IP packet is 65535 bytes. + </p> + + <p> If this is not set and if the interface has <code>internal</code> type, Open vSwitch will change the MTU to match the minimum of the other interfaces in the bridge. |