© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
107107107
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Check QoS TCAM
D-4500(config)#int fastEthernet 2/1
D-4500(config-if)# service-policy input classVOIP
D-4500(config-if)# 00:43:58: %C4K_HWACLMAN-4-ACLHWPROGERR:
Input Policy Map: classVOIP - hardware TCAM limit, qos being
disabled on relevant interface. 00:43:58:
%C4K_HWACLMAN-4-ACLHWPROGERRREASON: Input Policy Map: classVOIP -
out of hardware TCAM entries.
r3_4507R#sh platform hardware acl statistics utilization
( truncated output from Supervisor II-Plus)
Used (%) Free (%) Total
------------- -------------- ------
Input QosCam
PortAndVlan Entries 0 ( 0.0) 1024 (100.0) 1024
PortAndVlan Masks 0 ( 0.0) 128 (100.0) 128
PortOrVlan Entries 493 ( 48.1) 531 ( 51.8) 1024
PortOrVlan Masks 121 ( 94.5) 7 ( 5.4) 128
Output QosCAM
PortAndVlan Entries 0 ( 0.0) 1024 (100.0) 1024
PortAndVlan Masks 0 ( 0.0) 128 (100.0) 128
PortOrVlan Entries 0 ( 0.0) 1024 (100.0) 1024
PortOrVlan Masks 0 ( 0.0) 128 (100.0) 128
Note: Supervisor IV and V have larger TCAM’s
108108108
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
r3_4507R#sh platform hardware acl statistics utilization
With the default port based QoS
Used (%) Free (%) Total
------------- -------------- ------
PortOrVlan Entries 521 ( 50.8) 503( 49.1) 1024
PortOrVlan Masks 124 ( 96.8) 4( 3.1)128
With VLAN based QoS ..the same Service Policy is configured on a SVI...
PortOrVlan Entries 21 ( 2.0) 1003 ( 97.9)1024
PortOrVlan Masks 19 ( 14.8) 109 ( 85.1)128
Optimize QoS TCAM Utilization
• Use VLAN based QoS…if classification rules are the same within the VLAN
• General Policy should use VLAN based QoS…exceptions use port based QoS
Port BasedYesYesPort-Based (Default)
VLAN BasedYesYesVLAN-Based
Service Policy Used
Service Policy
Applied to the Port
Service Policy
Applied to the VLAN
QoS Policy on the
Port
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