M40E Multiservice Edge Router Overview; Figure 6: M40E Router - Juniper M Series Monitoring And Troubleshooting Manual

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M40e Multiservice Edge Router Overview

Requires router shutdown—You must power down the router before removing the

M40 Router Overview on page 13

The M40e router provides a dense, highly redundant platform primarily for dedicated

access aggregation at the edge as well as for mid-size core IP networks. The M40e router

supports Junos OS which provides router configuration and monitoring. (See

The M40e router shares the same chassis and many of the same components as the

M160 Internet router. It accepts both AC and DC power supplies. The M40e router can

have up to two Switching and Forwarding Modules (SFMs). The SFMs contain the Internet

Processor II application-specific integrated circuit (ASIC) and two Distributed Buffer

Manager ASICs, and make forwarding decisions, distribute packets throughout memory,

and forward notification of outgoing packets.

The M40e router includes the host module that constructs routing tables, performs

system management functions, and generates the SONET/SDH clock signal for

SONET/SDH interfaces. The host module contains the Routing Engine and the

Miscellaneous Control Subsystem (MCS). The Routing Engine manages routing protocols

and maintains the routing tables. For a host module to function, both of these

components must be installed and operational.

The M40e router houses three types of Flexible PIC Concentrators (FPCs): one to

accommodate M20 and M40 PICs, and two to accommodate hot-swappable M160

router PICs. The Type 1 FPCs for the M40e and M160 routers are interchangeable.

Chapter 1: M Series Multiservice Edge Routers