Juniper M-Series
| Date invented | 1998 |
|---|---|
| Manufacturer | Juniper Networks |
| Type | Network router |
| Processor | Internet processor |
Juniper M Series is a series of Multiservice Edge routers designed and manufactured by Juniper Networks, for enterprise and service provider networks. It spans over M7i, M10i, M40e, M120, and M320 platforms with 5 Gbit/s up to 160 Gbit/s of full-duplex throughput. The M40 router was the first product by Juniper Networks, which was released in 1998. The M Series routers run on JUNOS Operating System.
M Series Platform of Juniper routers includes the models like M7i, M10i, M40e, M120, and M320 routers. M40 and M20 platform routers have reached the end of sale.
M40 was the first product by Juniper Networks, which was released in 1998. The M40 was the first of its kind capable of scaling to meet the internet standards, which can move 40 million packets per second with a throughput rate in excess of 20 Gbit/s full-duplex. With the initial offering of m40, Juniper came up with the Internet Processor I. The proprietary ASIC was the fundamental core of Juniper's Packet Forwarding Engine (PFE). The PFE consisted of a shared memory, a single forwarding table, and a one-write, one-read architecture.The entire PFE was capable of forwarding at 40 Mpps, a capacity more than 100 times faster than that of any other available router architectures at that time. The M40 is one of the first routers on this scale, about 10 times faster than Cisco's 12000.
The M Series were also the first in the industry to offer a true decoupling of the Control Plane and the forwarding plane.
M20 was the second router introduced by Juniper Networks which was released in December 1999. The M20 also uses the Internet Processor II ASIC and is capable of throughput in excess of 10Gbit/s full-duplex.The M20 was the first Juniper router available with redundancy (power supply, routing engine, and system and switch board [SSB] ).
The M160 router, which was introduced in March 2000 as the third box in the M Series from Juniper Networks, outperforms its contemporary peers in areas of BGP table capacity, MPLS LSP capacity, route flapping recovery at OC-192 speeds, convergence at both OC-192 and OC-48 speeds, and filtering at both OC-192 and OC-48 speeds. In additional tests, the M160 has matched or exceeded the competition in the areas of CoS at OC-48 and OC-192 speeds and IP and MPLS baseline testing at OC-48 and OC-192 speeds. Unfortunately the M160 unexpectedly turned out to cause packet reordering especially on OC192 interfaces, because the packets are forwarded using four Packet Forwarding Engines operating in parallel. Packet reordering may affect the performance of transport protocol and applications.
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