<s>
Juniper	B-Protocol
M	I-Protocol
series	I-Protocol
is	O
a	O
line	O
of	O
multiservice	O
edge	B-Protocol
routers	I-Protocol
designed	O
and	O
manufactured	O
by	O
Juniper	O
Networks	O
,	O
for	O
enterprise	O
and	O
service	O
provider	O
networks	O
.	O
</s>
<s>
The	O
M40	O
router	B-Protocol
was	O
the	O
first	O
product	O
by	O
Juniper	O
Networks	O
,	O
which	O
was	O
released	O
in	O
1998	O
.	O
</s>
<s>
The	O
M-series	O
routers	B-Protocol
run	O
on	O
JUNOS	B-Application
Operating	O
System	O
.	O
</s>
<s>
The	O
M-series	O
platform	O
of	O
Juniper	O
routers	B-Protocol
includes	O
the	O
models	O
like	O
M7i	O
,	O
M10i	O
,	O
M40e	O
,	O
M120	O
,	O
and	O
M320	O
routers	B-Protocol
.	O
</s>
<s>
M40	O
and	O
M20	O
platform	O
routers	B-Protocol
have	O
reached	O
the	O
end	O
of	O
sale	O
.	O
</s>
<s>
The	O
PFE	O
consisted	O
of	O
a	O
shared	B-Operating_System
memory	I-Operating_System
,	O
a	O
single	O
forwarding	O
table	O
,	O
and	O
a	O
one-write	O
,	O
one-read	O
architecture	O
.	O
</s>
<s>
The	O
entire	O
PFE	O
was	O
capable	O
of	O
forwarding	O
at	O
40	O
Mpps	O
,	O
a	O
capacity	O
more	O
than	O
100	O
times	O
faster	O
than	O
that	O
of	O
any	O
other	O
available	O
router	B-Protocol
architectures	O
at	O
that	O
time	O
.	O
</s>
<s>
The	O
M40	O
is	O
one	O
of	O
the	O
first	O
routers	B-Protocol
on	O
this	O
scale	O
,	O
about	O
10	O
times	O
faster	O
than	O
Cisco	O
's	O
12000	O
.	O
</s>
<s>
M20	O
was	O
the	O
second	O
router	B-Protocol
introduced	O
by	O
Juniper	O
Networks	O
which	O
was	O
released	O
in	O
December	O
1999	O
.	O
</s>
<s>
The	O
M20	O
was	O
the	O
first	O
Juniper	O
router	B-Protocol
available	O
with	O
redundancy	O
(	O
power	O
supply	O
,	O
routing	B-Protocol
engine	O
,	O
and	O
system	O
and	O
switch	O
board	O
 [ SSB ] 	O
)	O
.	O
</s>
<s>
The	O
M160	O
router	B-Protocol
,	O
which	O
was	O
introduced	O
in	O
March	O
2000	O
as	O
the	O
third	O
box	O
in	O
the	O
M	O
series	O
from	O
Juniper	O
Networks	O
,	O
outperforms	O
its	O
contemporary	O
peers	O
in	O
areas	O
of	O
BGP	O
table	O
capacity	O
,	O
MPLS	B-Protocol
LSP	O
capacity	O
,	O
route	O
flapping	O
recovery	O
at	O
OC-192	B-Protocol
speeds	O
,	O
convergence	O
at	O
both	O
OC-192	B-Protocol
and	O
OC-48	O
speeds	O
,	O
and	O
filtering	O
at	O
both	O
OC-192	B-Protocol
and	O
OC-48	O
speeds	O
.	O
</s>
<s>
In	O
additional	O
tests	O
,	O
the	O
M160	O
has	O
matched	O
or	O
exceeded	O
the	O
competition	O
in	O
the	O
areas	O
of	O
CoS	O
at	O
OC-48	O
and	O
OC-192	B-Protocol
speeds	O
and	O
IP	B-Protocol
and	O
MPLS	B-Protocol
baseline	O
testing	O
at	O
OC-48	O
and	O
OC-192	B-Protocol
speeds	O
.	O
</s>
<s>
Both	O
routers	B-Protocol
employs	O
the	O
Internet	O
Processor	O
II	O
ASIC	O
,	O
providing	O
forwarding	O
table	O
lookups	O
at	O
40Mpps	O
.	O
</s>
<s>
The	O
M40e	O
router	B-Protocol
has	O
the	O
same	O
port	O
density	O
as	O
the	O
M40	O
,	O
but	O
it	O
provides	O
the	O
optional	O
redundancy	O
that	O
the	O
M40	O
did	O
n't	O
have	O
.	O
</s>
<s>
The	O
M7i	O
router	B-Protocol
is	O
Juniper	O
Networks	O
most	O
compact	O
routing	B-Protocol
platform	O
.	O
</s>
<s>
The	O
M7i	O
is	O
suited	O
to	O
the	O
role	O
of	O
an	O
IP/MPLS	B-Protocol
provider	B-Protocol
edge	I-Protocol
router	I-Protocol
in	O
small	O
POPs	O
or	O
as	O
an	O
enterprise	O
routing	B-Protocol
solution	O
for	O
Internet	O
gateway	O
or	O
branch	O
aggregation	O
.	O
</s>
<s>
It	O
supports	O
either	O
two	O
fixed	O
Fast	B-Protocol
Ethernet	I-Protocol
ports	O
,	O
two	O
fixed	O
Gigabit	O
Ethernet	O
ports	O
,	O
or	O
one	O
fixed	O
Gigabit	O
Ethernet	O
port	O
via	O
a	O
Fixed	O
Interface	O
Card	O
(	O
FIC	O
)	O
,	O
as	O
well	O
as	O
supporting	O
four	O
ejector-enabled	O
PICs	O
.	O
</s>
<s>
The	O
M7i	O
router	B-Protocol
supports	O
interface	O
speeds	O
of	O
up	O
to	O
OC-12c/STM	O
-4	O
and	O
Gigabit	O
Ethernet	O
.	O
</s>
<s>
The	O
M10i	O
router	B-Protocol
is	O
a	O
compact	O
and	O
fully	O
redundant	O
M-series	O
edge	B-Protocol
router	I-Protocol
.	O
</s>
<s>
The	O
M10i	O
supports	O
8	O
ejector-enabled	O
PICs	O
via	O
two	O
built-in	O
Flexible	O
PIC	O
concentrators	O
,	O
and	O
interface	O
speeds	O
up	O
to	O
OC-12/STM	O
-4	O
and	O
Gigabit	O
Ethernet	O
.	O
</s>
<s>
It	O
is	O
capable	O
of	O
supporting	O
MPLS	B-Protocol
services	O
at	O
Layers	O
2	O
and	O
3	O
,	O
including	O
Layer	B-Application
3	I-Application
VPNs	B-Application
.	O
</s>
<s>
The	O
M120	O
is	O
designed	O
to	O
deliver	O
superior	O
redundancy	O
and	O
facilitate	O
the	O
transport	O
of	O
legacy	O
Frame	B-Protocol
Relay	I-Protocol
and	O
ATM	O
traffic	O
over	O
high-bandwidth	O
Ethernet	O
links	O
.	O
</s>
<s>
The	O
M320	O
is	O
a	O
high	O
performance	O
,	O
10	O
Gbit/s	O
-capable	O
,	O
distributed	O
architecture	O
edge	B-Protocol
router	I-Protocol
.	O
</s>
<s>
It	O
offers	O
up	O
to	O
16	O
OC-192c/STM	O
-64	O
PICs	O
per	O
chassis	O
(	O
32	O
per	O
rack	O
)	O
or	O
up	O
to	O
64	O
OC-48c/STM	O
-16	O
ports	O
per	O
chassis	O
(	O
128	O
per	O
rack	O
)	O
,	O
with	O
up	O
to	O
320	O
Gbit/s	O
throughput	O
.	O
</s>
<s>
It	O
also	O
supports	O
provider	B-Protocol
edge	I-Protocol
services	O
in	O
10-gigabit	O
POPs	O
with	O
the	O
ability	O
to	O
support	O
up	O
to	O
32	O
type	O
1	O
and	O
type	O
2	O
PICs	O
and	O
up	O
to	O
16	O
type-3	O
PICs	O
for	O
10	O
Gbit/s	O
uplinks	O
.	O
</s>
<s>
The	O
Juniper	B-Protocol
M-series	I-Protocol
products	O
are	O
widely	O
used	O
in	O
the	O
large	O
networks	O
around	O
the	O
world	O
.	O
</s>
<s>
Features	O
and	O
services	O
supported	O
in	O
M	O
Series	O
routers	B-Protocol
include	O
advanced	O
IP/MPLS	B-Protocol
edge	B-Device
routing	I-Device
services	O
,	O
a	O
broad	O
array	O
of	O
VPNs	B-Application
,	O
network-based	O
security	O
,	O
real-time	O
voice	O
and	O
video	O
,	O
bandwidth	O
on	O
demand	O
,	O
rich	O
multicast	O
of	O
premium	O
content	O
,	O
IPv6	B-Protocol
services	O
,	O
granular	O
accounting	O
etc	O
.	O
</s>
<s>
These	O
IP/MPLS	B-Protocol
M	O
Series	O
Multiservice	O
Edge	B-Device
Routing	I-Device
platforms	O
are	O
deployed	O
at	O
the	O
edge	O
of	O
provider	O
networks	O
,	O
in	O
small	O
and	O
medium	O
cores	O
,	O
and	O
in	O
peering	O
,	O
route	O
reflector	O
and	O
data-center	O
applications	O
.	O
</s>
<s>
A	O
single	O
M-series	O
multiservice	O
edge	B-Device
routing	I-Device
platform	O
can	O
provide	O
a	O
single	O
point	O
of	O
edge	O
aggregation	O
for	O
thousands	O
of	O
customers	O
over	O
any	O
access	O
type	O
—	O
including	O
ATM	O
,	O
Frame	B-Protocol
Relay	I-Protocol
,	O
Ethernet	O
and	O
TDM	O
and	O
at	O
any	O
speed	O
from	O
DS0	O
up	O
to	O
OC-192/STM	O
-64	O
and	O
10	O
Gigabit	O
Ethernet	O
.	O
</s>
<s>
It	O
also	O
supports	O
Layer	B-Protocol
2	I-Protocol
virtual	O
circuits	O
,	O
Layer	B-Protocol
2	I-Protocol
VPNs	B-Application
,	O
Layer	O
2.5	O
Interworking	O
VPNs	B-Application
,	O
Layer	B-Application
3	I-Application
2547	O
VPNs	B-Application
,	O
VPLS	B-Application
,	O
IPSec	B-Protocol
,	O
GRE	O
,	O
IP	B-Protocol
over	O
IP	B-Protocol
and	O
other	O
tunneling	B-Protocol
mechanisms	O
.	O
</s>
<s>
These	O
comprehensive	O
QoS	O
functions	O
include	O
classification	O
,	O
rate	O
limiting	O
,	O
shaping	O
,	O
weighted	B-Algorithm
round-robin	I-Algorithm
scheduling	I-Algorithm
,	O
strict	B-Application
priority	I-Application
queuing	I-Application
,	O
weighted	O
random	O
early	O
detection	O
,	O
random	O
early	O
detection	O
and	O
packet	O
marking	O
.	O
</s>
<s>
For	O
network	O
convergence	O
applications	O
,	O
Layer	B-Protocol
2	I-Protocol
CoS	O
can	O
be	O
mapped	O
to	O
Layer	B-Application
3	I-Application
CoS	O
on	O
a	O
per	O
DLCI	O
,	O
per	O
VP/VC	O
,	O
or	O
per-VLAN	O
basis	O
.	O
</s>
