Juniper Networks M10i Benutzerhandbuch
Routing Engine
The Routing Engine is an Intel-based PCI platform that runs JUNOS Internet software.
Software processes that run on the Routing Engine maintain the routing tables,
manage the routing protocols used on the router, control the router's interfaces,
control some chassis components, and provide the interface for system management
and user access to the router.
Software processes that run on the Routing Engine maintain the routing tables,
manage the routing protocols used on the router, control the router's interfaces,
control some chassis components, and provide the interface for system management
and user access to the router.
For a description of the Routing Engine's role in router architecture, see
One or two Routing Engines can be installed into the midplane from the front of the
chassis, as shown in
chassis, as shown in
Chassis Manager (HCM) determines which is the master and which is in standby
mode (and so performs no functions). By default, the Routing Engine in the slot
labeled
mode (and so performs no functions). By default, the Routing Engine in the slot
labeled
RE0
is the master.
To change the default master Routing Engine, include the appropriate
[edit chassis redundancy routing-engine]
statement in the configuration, as described
in the section about Routing Engine redundancy in the JUNOS System Basics
Configuration Guide.
Configuration Guide.
on page 3. Removal or failure of the standby Routing Engine does not affect
router function. If the master Routing Engine is removed from the chassis, the effect
depends on whether two Routing Engines are installed:
depends on whether two Routing Engines are installed:
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With the default router configuration, in case of failure you must correct the
problem manually. You can issue the appropriate
problem manually. You can issue the appropriate
request chassis routing-engine master
command to switch mastership to the other
Routing Engine, for example. For information about the command, see the JUNOS
System Basics and Services Command Reference.
System Basics and Services Command Reference.
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On routers with two installed Routing Engines, you can configure graceful
switchover of Routing Engines or automatic Routing Engine mastership failover.
If the Routing Engines are configured for graceful switchover, the standby Routing
Engine immediately assumes Routing Engine functions and there is no
interruption to packet forwarding. Otherwise, packet forwarding halts while the
standby Routing Engine becomes the master and the Packet Forwarding Engine
components reset and connect to the new master Routing Engine. For information
about configuring graceful switchover or automatic mastership failover, see the
section about Routing Engine redundancy in the JUNOS System Basics
Configuration Guide.
switchover of Routing Engines or automatic Routing Engine mastership failover.
If the Routing Engines are configured for graceful switchover, the standby Routing
Engine immediately assumes Routing Engine functions and there is no
interruption to packet forwarding. Otherwise, packet forwarding halts while the
standby Routing Engine becomes the master and the Packet Forwarding Engine
components reset and connect to the new master Routing Engine. For information
about configuring graceful switchover or automatic mastership failover, see the
section about Routing Engine redundancy in the JUNOS System Basics
Configuration Guide.
We recommend you run JUNOS Release 7.0 or later on the M10i router to support
graceful switchover.
graceful switchover.
For replacement instructions, see
Routing Engine Components
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Routing Engine
M10i Internet Router Hardware Guide