<s>
Distributed	B-Protocol
Overlay	I-Protocol
Virtual	I-Protocol
Ethernet	I-Protocol
(	O
DOVE	O
)	O
is	O
a	O
tunneling	B-Protocol
and	O
virtualization	B-General_Concept
technology	O
for	O
computer	B-Architecture
networks	I-Architecture
,	O
created	O
and	O
backed	O
by	O
IBM	O
.	O
</s>
<s>
DOVE	O
allows	O
creation	O
of	O
network	O
virtualization	B-General_Concept
layers	O
for	O
deploying	O
,	O
controlling	O
,	O
and	O
managing	O
multiple	O
independent	O
and	O
isolated	O
network	O
applications	O
over	O
a	O
shared	O
physical	O
network	B-Architecture
infrastructure	I-Architecture
.	O
</s>
<s>
The	O
tunneling	B-Protocol
format	O
is	O
decoupled	O
from	O
the	O
logical	O
network	O
view	O
offered	O
by	O
DOVE	O
,	O
and	O
defines	O
only	O
the	O
way	O
frames	B-Protocol
are	O
encapsulated	B-Protocol
to	O
be	O
transferred	O
by	O
the	O
underlying	O
network	B-Architecture
infrastructure	I-Architecture
.	O
</s>
<s>
As	O
a	O
notable	O
difference	O
from	O
other	O
network	O
virtualization	B-General_Concept
solutions	O
(	O
such	O
as	O
OTV	B-Protocol
)	O
,	O
this	O
allows	O
DOVE	O
not	O
to	O
be	O
limited	O
to	O
providing	O
OSI	O
layer	O
2	O
emulation	O
only	O
(	O
for	O
example	O
,	O
passing	O
Ethernet	B-Protocol
frames	I-Protocol
)	O
.	O
</s>
<s>
Logical	O
components	O
of	O
the	O
DOVE	O
architecture	O
are	O
DOVE	O
controllers	O
and	O
DOVE	O
switches	B-Protocol
(	O
abbreviated	O
as	O
dSwitch	O
)	O
.	O
</s>
<s>
DOVE	O
controllers	O
perform	O
management	O
functions	O
,	O
and	O
one	O
part	O
of	O
the	O
control	B-Protocol
plane	I-Protocol
functions	O
across	O
DOVE	O
switches	B-Protocol
.	O
</s>
<s>
DOVE	O
switches	B-Protocol
perform	O
the	O
encapsulation	B-Protocol
of	O
layer2	O
frames	B-Protocol
into	O
UDP	B-Protocol
packets	I-Protocol
using	O
the	O
Virtual	B-Protocol
Extensible	I-Protocol
LAN	I-Protocol
(	O
VXLAN	B-Protocol
)	O
frame	O
format	O
,	O
and	O
provide	O
virtual	O
interfaces	O
for	O
virtual	B-Architecture
machines	I-Architecture
to	O
plug	O
into	O
,	O
similarly	O
to	O
how	O
physical	O
Ethernet	B-Protocol
switches	I-Protocol
provide	O
ports	O
for	O
network	B-Protocol
interface	I-Protocol
controller	I-Protocol
(	O
NIC	O
)	O
connections	O
.	O
</s>
<s>
DOVE	O
switches	B-Protocol
are	O
running	O
as	O
part	O
of	O
virtual	B-Architecture
machine	I-Architecture
hypervisors	B-Operating_System
.	O
</s>
<s>
,	O
DOVE	O
components	O
are	O
implemented	O
as	O
part	O
of	O
VMware	O
's	O
hypervisors	B-Operating_System
,	O
while	O
implementations	O
for	O
the	O
Linux	B-Application
KVM	I-Application
and	O
Open	B-Language
vSwitch	I-Language
are	O
planned	O
.	O
</s>
<s>
DOVE	O
extensions	O
for	O
VXLAN	B-Protocol
were	O
merged	O
into	O
the	O
Linux	B-Application
kernel	O
mainline	O
in	O
kernel	O
version	O
3.8	O
,	O
which	O
was	O
released	O
on	O
February	O
18	O
,	O
2013	O
.	O
</s>
<s>
Appropriate	O
extensions	O
to	O
related	O
userspace	B-Operating_System
configuration	O
utilities	O
were	O
added	O
into	O
version	O
3.8.0	O
of	O
the	O
iproute2	B-Protocol
utilities	O
,	O
which	O
was	O
released	O
on	O
February	O
21	O
,	O
2013	O
.	O
</s>
