Outlines usage guidelines for managing traffic with VOQs, including verifying CGM profile and VOQ resource usage, and provides instructions for safely modifying QoS and queuing policies to prevent congestion-management resource exhaustion.
Verify CGM profile usage before modifying QoS policies
Verify congestion management (CGM) profile and VOQ resource usage before you perform in-place modification of queuing policies that change parent shaper values or otherwise affect congestion-management resources.
To verify congestion management (CGM) profile usage, use the show ofa objects tmrateprofile object-count location command.
Example:
Router# show ofa objects tmrateprofile object-count location 0/7/CPU0
Table [TMRATEPROFILE] has 22 entries in DB.If the current usage approaches the platform limit of 29 CGM profiles, avoid modifying multiple policies simultaneously. Use the options to
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remove all policy maps from interfaces, update the global QoS configuration, and then reapply the policies under the interfaces, or
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break the configuration into smaller chunks and apply the changes in smaller increments after evaluating the resource impact of each line change.