JUNOS Internet Software Network Operations Guide: Hardware
466 ! Understanding Redundancy for the Routing Engine, Host Module, and Host Subsystem
M20 Router Redundant Routing Engines and SSBs
The M20 router can have one or two Routing Engines. The System and Switch
Boards (SSBs) communicate with the Routing Engines. (See Figure 184 and
“Redundancy Connection for an M20 Router” on page 471.)
Figure 184: M20 Router Redundant Routing Engines and SSBs
g002292
SSB0
RE0
RE1
System and Switch Boards
(SSBs)
SSB1
Routing
Engines
M20 router front M20 router rear
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