3.1 Juniper Networks Router Models


This section describes the different models of Juniper Networks routers. The physical dimension, performance statistics, and some information about the internal architecture of the router itself are provided for each model.

3.1.1 M5 and M10

The M5 and M10 routers were introduced in September 2000 as the latest additions to the router family. With their introduction, Juniper Networks hoped to gain a larger marketshare by appealing to networks needing a smaller footprint router. Due to its minimal physical requirements ”5.25 x 17.4 x 24 in., or 13.33 x 44.2 x 60.96 cm ”single rack can hold 15 M5s, which creates a bandwidth-to-footprint-to-price ratio that is hard to beat.

The M5 and M10 were released at the same time because they had similar architectures with two different throughput capabilities (5Gbps on the M5 and 10Gbps on the M10). Both routers employ the Internet Processor II ASIC, providing forwarding table lookups at 40Mpps.The M10's chassis looks the same as the M5's; however, there are two forwarding engine boards (FEBs) in the M10, allowing for a maximum of eight physical interface cards (PICs) to be used.

3.1.2 M20

The second router introduced by Juniper Networks was the M20, released in December 1999. The M20 also uses the Internet Processor II ASIC and is capable of throughput in excess of 20Gbps.

With physical dimensions of 14 x 19 x 21 in., or 35.56 x 48.26 x 53.34 cm, a network administrator can stack five chassis in a single equipment rack. The M20 was the first Juniper Networks router available with redundancy (power supply, routing engine, and system and switch board [SSB]). This greatly increased the appeal of the Juniper Networks routers to the marketplace . Component failure in an operational network can be disastrous. By addressing the need for component redundancy, Juniper Networks was able to allay this fear in the minds of potential customers.

3.1.3 M40

The M40 router was the first product launched by Juniper Networks. With a chassis size of 35 x 19 x 23.5 in., or 88.9 x 48.26 x 59.69 cm, deployment is limited to two chassis per equipment rack. However, the router's architecture provides over 40Gbps throughput. The M40 supports the same PICs as the M20. The PICs are compatible between both platforms.

Although initially deployed with the Internet Processor I and without ACL capability, the M40 now runs on the Internet Processor II and has addressed the need for filtering. This platform, however, does not provide for the same component redundancy as the M20 and M160 models, an important distinction for most customers.

3.1.4 M40e

To answer the need for the throughput of the M40 coupled with redundant-component capability, Juniper Networks introduced the M40e platform in February 2002. The M40e router has the same footprint and port density as the M40, but it provides the optional redundancy that the M40 does not. This model is compatible with most of the PICs from the M20, M40, and M160 models.

3.1.5 M160

The M160 was introduced in March 2000 as the third box in the M-Series. It is a formidable router, both in size and capacity. The M160 chassis is 35 x 19 x 29 in., or 88.9 x 48.26 x 73.66 cm. This allows for two per equipment rack.

The M160, to date, is the highest-rated core router on the market. Independent testing has shown that the M160 outperforms the competition 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.

The M160 platform provides the maximum throughput and port density necessary for the next generation of Internet architectures.

3.1.6 G10

In November 2001, Juniper Networks announced its intent to acquire Pacific Broadband Communications and its CMTS. Subsequently, Juniper Networks rereleased that CMTS as its G10 router. This product is aimed at the growing broadband-remote-access-service (BRAS) market that delivers Internet service into private homes and small businesses primarily through cable modems.

A chief complaint of cable Internet subscribers is that as more subscribers join in a given area, the amount of bandwidth available to each end user can drop dramatically. The G10 uses a custom-built ASIC that has the capability of 20 legacy CMTS chips. The end result is that this device is capable of supporting greater numbers of subscribers using less bandwidth.



Juniper Networks Reference Guide. JUNOS Routing, Configuration, and Architecture
Juniper Networks Reference Guide: JUNOS Routing, Configuration, and Architecture: JUNOS Routing, Configuration, and Architecture
ISBN: 0201775921
EAN: 2147483647
Year: 2002
Pages: 176

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