[5] 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.
The PFE consisted of a shared memory, a single forwarding table, and a one-write, one-read architecture.
The M20 was the first Juniper router available with redundancy (power supply, routing engine, and system and switch board [SSB] ).
Both routers employs the Internet Processor II ASIC, providing forwarding table lookups at 40Mpps.
There are two forwarding engine boards (FEBs) in the M10, allowing for a maximum of eight physical interface cards (PICs) to be used.
The M7i is suited to the role of an IP/MPLS provider edge router in small POPs or as an enterprise routing solution for Internet gateway or branch aggregation.
The M120 is designed to deliver superior redundancy and facilitate the transport of legacy Frame Relay and ATM traffic over high-bandwidth Ethernet links.
[1][46] A single M-series multiservice edge routing platform can provide a single point of edge aggregation for thousands of customers over any access type — including ATM, Frame Relay, Ethernet and TDM and at any speed from DS0 up to OC-192/STM-64 and 10 Gigabit Ethernet.
It supports multiple levels of granular quality of service per port, per logical circuit (DLCI, VC/VP, VLAN), and per channel (to DS0) for traffic prioritization.