Understanding Redundant Routing Engines ! 497
Chapter 37: Monitoring Redundant Routing Engines
M320 Router Routing Engine Redundancy
The M320 router has a redundant Routing Engine that is a component of the host
subsystem (see Figure 196). The host subsystem consists of a Routing Engine and a
Control Board. Two host subsystems can be installed in the M320 router. For more
information about monitoring redundant Control Boards, see “Monitoring
Redundant Control Boards” on page 559.
Both the Routing Engine and the Control Board must be installed for the host
subsystem to function. When two host subsystems are installed in the router, both
are powered on, but only one is the master; the second host subsystem is the
backup and performs no functions. By default, the master host module has
components installed in slots
RE0 and CB0; the backup host module has
components installed in slots
RE1 and CB1. The Routing Engines are hot-pluggable.
The M320 router craft interface LEDs indicate the Routing Engine operating status
and mastership. (See “Check the M320 Router Routing Engine LEDs” on page 144.)
Figure 196: M320 Router Redundant Routing Engines
A
MASTER
FAI
L
OK
A
B
B
MASTER
FAIL
OK
ACTIVE
OK
FAIL
ACTIVE
OK
FAIL
ACTIVE
OK
FAIL
To Next Page
Loading...
Need help?
General
