The router provides multiple redundancy options and chassis configurations, enhanced
ASIC features, and chassis and Packet Forwarding Engine (PFE) scaling. PFE routing
functionality is performed by Forwarding Engine Boards (FEBs) which separate routing
ASICs from Flexible PIC Concentrators (FPCs) to provide high availability and redundancy
of the forwarding engine. The router utilizes the I-chip ASIC, which supports up to 32,000
logical interfaces depending on your configuration. The base chassis provides 120 gigabits
per second (Gbps) of midplane bandwidth between the interfaces and FEBs, and 144
Gbps, half duplex, of fabric bandwidth between the FEBs.
The M120 router accepts both AC and DC power supplies. See Figure 8 on page 18 and
Figure 9 on page 19.
Figure 8: Rear View of an AC M120 Router
Copyright © 2012, Juniper Networks, Inc.18
M Series and T Series Routers Monitoring and Troubleshooting Guide
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