JUNOS Internet Software Network Operations Guide: Hardware
In addition to accommodating up to four Physical Interface Cards (PICs), the M7i router includes a built-in Fixed Interface Card (FIC) that provides two Fast Ethernet ports or one Gigabit Ethernet port, depending on which FIC or which model was ordered. For more information about Fast Ethernet and Gigabit Ethernet interfaces, see the M7i Internet Router PIC Guide .
The M7i router supports various PICs, including ATM, channelized, Ethernet, IP services, and SONET/SDH interfaces. For more information about supported PICs, see the M7i Internet Router PIC Guide .
The M7i router provides a maximum aggregate throughput of 8.4 gigabits per second (Gbps). Control operations in the router are perform Control operations in the router are performed by the Routing Engine, which runs JUNOS software to handle routing protocols, traffic engineering, policy, policing, monitoring, and configuration management. Forwarding operations in the router are performed by the Packet Forwarding Engine.
M7i Router Components
Table 4 lists the major M7i router components and characteristics.
Table 4: M7i Router Major Hardware Components
Component
CFEB
Cooling system
FIC
PIC
Power supply
Routing Engine
Quantity Function
1 Provides route lookup, management of shared memory, transfer of outgoing data packets, and transfer of exception and control packets; includes built-in tunnel interface and optional Adaptive Services
PIC
–
Cools router components – 1 fan tray
(4 fans)
1
Redundant
Field-
Replaceable
Hot-removable, hot-insertable
Built-in
Offline
Button
Hot-pluggable
(routing functions are interrupted when removed)
Yes
–
PICs
On/Off button
1–4
2 AC or
2 DC
1
Receives incoming packets and transmits outgoing packets to the network, displays alarm status, and takes PICs online and offline (2 Fast Ethernet or 1 Gigabit
Ethernet)
–
Provides interfaces to various network media and performs framing and line-speed signaling
–
Distributes needed voltages to components
Yes
Maintains the routing tables, manages the routing protocols, controls the interfaces, controls some chassis components, and provides the interface for system management and user access
–
Hot-removable, hot-insertable
Yes
Hot-removable, hot-insertable
Yes
Hot-pluggable
(routing functions are interrupted when removed)
Yes
8 !
M7i Router Components
