M320 Router, T320 Router, And T640 Routing Node Redundant Host Subsystems - Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Network Operation Manual

JUNOS Internet Software Network Operations Guide: Hardware

M320 Router, T320 Router, and T640 Routing Node Redundant Host Subsystems

Figure 186: M320 Router, T320 Router, and T640 Routing Node Redundant Host Subsystems
M320 router rear
CB0
RE0
RE1
CB1
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Understanding Redundancy for the Routing Engine, Host Module, and Host Subsystem
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.)
Control Boards
Routing Engines
Control Boards
T640 routing node rear
CB0
RE0
RE1
CB1
T320 router rear
Control Board
Routing Engines
Control Board
CB0
RE0
RE1
CB1