<s>
The	O
Cisco	B-Device
12000	I-Device
,	O
also	O
known	O
as	O
a	O
Gigabit	O
Switch	O
Router	B-Protocol
or	O
GSR	O
,	O
is	O
a	O
series	O
of	O
large	O
network	B-Protocol
routers	I-Protocol
designed	O
and	O
manufactured	O
by	O
Cisco	O
Systems	O
.	O
</s>
<s>
Cisco	B-Device
12000	I-Device
series	O
routers	B-Protocol
feature	O
a	O
high-performance	O
switched	O
backplane	O
providing	O
2.4Gbit/s	O
across	O
16	O
switched	O
ports	O
simultaneously	O
.	O
</s>
<s>
The	O
Multi-Service	O
Blade	O
module	O
(	O
introduced	O
for	O
the	O
XR	O
12000	O
line	O
)	O
provides	O
firewall	B-Application
and	O
acts	O
as	O
a	O
session	B-Protocol
border	I-Protocol
controller	I-Protocol
.	O
</s>
<s>
Certain	O
line	O
cards	O
in	O
Cisco	B-Device
12000	I-Device
routers	B-Protocol
are	O
potentially	O
vulnerable	O
to	O
denial-of-service	O
attacks	O
.	O
</s>
