Juniper JUNOS - NETWORK OPERATION GUIDE REV1 User Manual

JUNOS Internet Software Network Operations Guide: Hardware
468 ! Understanding Redundancy for the Routing Engine, Host Module, and Host Subsystem
M320 Router, T320 Router, and T640 Routing Node Redundant Host Subsystems
On the M320 router, T320 router, and the T640 routing node, the host subsystem
consists of a Routing Engine and Control Board functioning as a unit. Two host
subsystems can be installed in each routing platform. One pair functions as master,
while the other stands by as backup should the master Routing Engine fail. (See
Figure 186, “Redundancy Connection for an M320 Router” on page 473, and
“Redundancy Connection for a T320 Router and T640 Routing Node” on page 474.)
Figure 186: M320 Router, T320 Router, and T640 Routing Node Redundant Host Subsystems
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M320 router rear
T640 routing node rear
Control Boards
Control Board
Control Board
Control Boards
Routing Engines
Routing Engines
T320 router rear

Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Specifications

General

Brand	Juniper
Model	JUNOS - NETWORK OPERATION GUIDE REV1
Category	Software
Language	English