Cisco Cisco Prisma II EDR Receiver 설치 가이드
1-12
Introduction
78-748704-01 Rev C
Processor Configuration Options,
Continued
Redundant Mode
Both optical receivers installed in the processor may be configured to operate as
either a Master, Internal, or External optical receiver as explained below and
illustrated on the following pages.
Receiver
Type
Description
Master
The primary optical receiver. You can configure one, both, or neither
of the optical receivers in the same processor as Master.
•
•
If both optical receivers in the same processor are configured as
Master, they have no internal backup and can only be backed-up
by an identical optical receiver configured as External.
•
If only one is configured as Master, the other optical receiver in
that processor may also operate in one of the two redundant
modes listed below.
•
If neither optical receiver in a processor is configured as Master,
they must operate in one of the two redundant modes listed below.
Master is the default setting.
Internal
Internally redundant to an optical receiver located in the same
processor.
•
•
With one optical receiver configured to Master, the other optical
receiver in the same processor can be configured as Internal
(internally redundant), providing backup to the master optical
receiver.
•
When configured to Internal, an optical receiver’s output is
activated only if the master optical receiver in the same processor
fails. Two optical receivers in the same processor cannot be
configured to Internal, as they would both be internal redundant
with no master to back-up. Two optical receivers in the same
processor configured to Internal will generate an RdnInvld alarm
on the ICIM and an Invalid Redundant Receiver alarm when
using LCI or TNCS software.
External Externally redundant to an optical receiver located outside of the
processor. You can configure one, or both, or neither of the optical
receivers in the same processor as External. When configured to
External, an optical receiver is redundant to an optical receiver located
in a separate processor. When configured as External, the optical
receiver’s output is activated only if the master optical receiver located
in the other processor fails.