Managing Global Settings
Cisco Systems, Inc. Page 121
When the VNE is using slow polling and CPU usage drops to a regular level
(or below the minimum value), Sheer DNA waits for the VNE to drop below
the maximum CPU usage threshold value twice (default) and only then does
the VNE return to normal polling.
In the example below CPU usage is polled 5 times and it is above the
maximum value, so the VNE moves to slow polling. The CPU usage then
drops to a regular level (or below the minimum value). The CPU usage is the
polled again twice and it is below the maximum value, so the VNE returns to
normal polling.
Maximum
threshold
value
Minimum
threshold
value
Normal polling
1. CPU usage is polled 5 times
(and above the max. value)
3. CPU usage is polled twice
(and below the max. value)
2. VNE moves to slow polling 4. VNE returns to normal polling
If CPU usage is high and a slow polling interval is used and the AVM goes
down and is then restarted the AVM remembers its previous polling interval
and when the AVM is restarted the AVM will make use of the same polling
interval that it was using before it went down.
7.5 Managing Protection Groups By default all the Sheer DNA Units in the Sheer DNA Fabric belong to one
big cluster, namely, the default-pg protection group. The administrator can
change the default setup of the Sheer DNA Units by customizing protection
groups (clusters) and then assigning Sheer DNA Units to these groups.
For more information, refer to the Cisco Active Network Abstraction High
Availability User’s Guide.
Sheer DNA Manage enables the user to create new protection groups. The
new protection groups that are created can then be used when defining a
Sheer DNA Unit. For more information, refer to page 71.