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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 23 Configuring Redundancy
Configuring Redundant Supervisor Engines on the Switch
•
The expected results are as follows:
–
The active supervisor engine run-time image is synchronized with the standby supervisor
engine.
–
The active supervisor engine attempts to copy its
f1
image to the standby supervisor engine.
–
Because there is not enough space on the standby supervisor engine bootflash, the redundant
synchronization function finds the oldest file, deletes it, and squeezes bootflash.
–
The active supervisor engine copies the
f1
image to the standby supervisor engine and renames
it
RTSYNC_f1
.
–
The standby supervisor engine bootflash is modified to the following:
f3, f4, RTSYNC_f1
.
–
The standby supervisor engine bootstring is modified to the following:
RTSYNC_f1,1;f2,1;
.
–
The standby supervisor engine is reset.
Synchronizing the Boot Images on the Active and Standby Supervisor Engines
This section contains four examples in which the bootstrings on the active and standby supervisor
engines are synchronized.
Example 1: Unable to allocate the boot image
The configuration for this example is as follows:
•
The active supervisor engine configuration is as follows:
–
Run-time image:
bootflash:f1
–
Bootstring:
bootflash:f1,1;
–
Bootflash:
f1
•
The standby supervisor engine configuration is as follows:
–
Run-time image:
bootflash:f1
–
Bootstring:
bootflash:f1,1;
–
Bootflash:
f1
•
The time stamp for
f1
on the active supervisor engine is the same as
f1
on the standby supervisor
engine.
•
The system attempts to modify the active supervisor engine bootstring to the following:
f2,1;
.
•
The expected results are as follows:
–
The active supervisor engine is unable to allocate
f2
, causing the synchronization to fail.
–
An error is recorded in syslog.
–
The active supervisor engine
f1
image is not copied to the standby supervisor engine.
–
The standby supervisor engine bootstring is not modified.
–
The standby supervisor engine is not reset.
