Specifications
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2.9  The M5 and M10 Internet Routers  
The M10/M5 is a compact, high-performance routing platform based on the 
ASIC-based M160/M40/M20 forwarding architecture (including the Internet 
Processor II) and JUNOS Internet software. As an extension of the 
M160/M40/M20 product line, the M10/M5 is targeted at a variety of Internet 
applications, including high-speed access, public and private peering, 
content sites, and backbone core networks. Only 5.25 inches in height, the 
M10/M5's compact design brings tremendous performance and port density 
in very little rack space. The M10/M5 ships in the form of two product 
variants: 
§  the M10 supports 8 PIC slots 
§  the M5 supports 4 PIC slots 
Both variants ship in a 5.25-inch chassis. The M10/M5 offers performance, 
scalability, and reliability in a space-efficient package, with a feature set that 
includes: 
§  A forwarding engine capable of route lookup rates in excess of 40 million 
packets per  second for line-rate forwarding performance. This 
performance is significantly oversized for Chaser interfaces, leaving 
plenty of headroom for value-added services (e.g. CoS, packet filtering, 
sampling) 
§  Aggregate throughput capacity exceeding 10 Gbps and 5 Gbps for the 
M10 and M5 respectively  – the M10 has an aggregate throughput of 
12.8 Gbps (half duplex) and the M5 has an aggregate throughput of 6.4 
Gbps (half duplex) 
§  The Internet Processor II ASIC, offering rich, performance-based 
enhanced services  
§  A  routing engine that supports hundreds of peering sessions and 
thousands of virtual circuit connections. 
§  Market-leading port density and flexibility 
§  A space- and power-efficient form-factor 
§  Production-proven routing software with Internet-scale implementations 
of BGP4, IS-IS, OSPF, MPLS for traffic engineering, and Multicast 
The M10/M5 extends the Juniper product family, leveraging proven 
technology developed for the M160, M40 and M20 Internet Backbone 
Routers, which have been deployed in the largest service provider networks 
in the world. The M10/M5 runs the same JUNOS software that is supported 
by the M160, M40, and M20.  
2.9.1  The Forwarding Engine Board 
The M10/M5 packet forwarding engine architecture leverages the production-
proven ASIC technology of the M40 Internet Backbone Router. The heart of 
the M10/M5 forwarding engine is the Internet Processor II ASIC, capable of 
lookup rates exceeding 40 million packets per second. This lookup capacity 
enables line-rate support at all packet sizes for interface speeds ranging from 
The M10 router 
The M5 router 










