Juniper J4350, Руководство по началу работы

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J4350 and J6350 Services Router Getting Started Guide
Table 6: J4350 and J6350 Physical Specifications
Description Value
Chassis dimensions 3.44 in. (8.74 cm) high
17.44 in. (44.3 cm) wide—19.44 in. (48.38 cm) wide with mounting brackets attached
21.13 in. (53.67 cm) deep—plus 0.5 in. (1.27 cm) of hardware that protrudes from the
chassis front
Router weight
J4350 Services Router:
Minimum (no PIMs): 23 lb (10.4 kg)
Maximum (six PIMs): 25.3 lb (11.5 kg)
J6350 router
Minimum (no PIMs and one power supply): 25.5 lb (11.6 kg)
Maximum (six PIMs and two power supplies): 30.7 lb (13.9 kg)
Midplane
The midplane is located in the center of the chassis and forms the rear of
the PIM card cage (see Figure 6). You install the PIMs into the midplane
from the front of the chassis. Data packets are transferred across the
midplane from the PIM to the Routing Engine, and from the Routing
Engine across the midplane to the destination PIM.
Routing Engine
The Routing Engine provides three main functions:
Creates the packet forwarding switch fabric for the Services Router, providing
route lookup, filtering, and switching on incoming data packets, then directing
outbound packets to the appropriate interface for transmission to the network.
Maintains the routing tables used by the router and controls the routing
protocols that run on the router.
Provides control and monitoring functions for the router, including controlling
power and monitoring system status.
The Routing Engine consists of the following components:
Processor—Creates the packet forwarding switch fabric for the router and
runs JUNOS Internet software to maintain the router’s routing tables and
routing protocols.
DRAM—Buffers incoming packets and provides storage for the routing and
forwarding tables and for other Routing Engine processes.
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J4350 and J6350 Services Router Hardware Features