Document ID: 116263
Updated: Jun 26, 2013
Contributed by Shashank Singh, Cisco TAC Engineer.
Introduction
This document describes a problem with the creation of new policy maps along with attempts to follow logs on a Cisco Metro Ethernet 3600X Series switch (ME3600X).
Problem
After you create a certain number of policy maps, the ME3600X switch might report this log along with a failure to create any new policy maps:
QOSMGR-3-PROFILE_EXHAUST:
No free scheduler profiles available in hardware
This might occur even if the Quality of Service (QoS) Ternary Content Addressable Memory (TCAM) has available space:
Switch#show platform tcam utilization qos
Nile Tcam Utilization per Application & Region:
ES == Entry size == Number of 80 bit TCAM words
==================================================================
App/Region Start Num Avail ES Used Range Num Used
==================================================================
QOS 36864 4096 2
nile0 2966
nile1
Solution
This log is expected when all scheduler profiles (255) run out, as per the policy map configuration. In order to verify this, enter the show platform qos scheduler profile queue 0 command:
Switch#show platform qos scheduler profile queue 0
Asic 01)PIR =1000000 bandwidth =0 eir_ratio=1 ref_count=19 mtu=1500
2)PIR =1000000 bandwidth =0 eir_ratio=1 ref_count=1 mtu=9200
3)PIR =5000 bandwidth =5000 eir_ratio=1 ref_count=0 mtu=1500
So on?.
252)PIR =5083 bandwidth =5083 eir_ratio=1 ref_count=0 mtu=1500
253)PIR =5083 bandwidth =0 eir_ratio=1 ref_count=1 mtu=1500
254)PIR =5083 bandwidth =0 eir_ratio=98 ref_count=0 mtu=1500
255)PIR =1000000 bandwidth =0 eir_ratio=1 ref_count=1 mtu=2000
Scheduler is a different hardware resource, and TCAM utilization is independent of this problem. The amount of scheduler usage depends on the configuration. A policy map that utilizes more features (percent of bandwidth available, shape) is expected to use more scheduler resources than others.
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