Memory Consistency Check Routines - Cisco Catalyst 2928 Software Configuration Manual

Chapter 33 Troubleshooting

Memory Consistency Check Routines

The switch runs memory consistency check routines to detect and correct invalid ternary content
addressable memory (TCAM) table entries that can affect the performance of the switch.
If the switch cannot fix the error, it logs a system error message, specifying the TCAM space in which
the error is located:
•
•
•
The output from the show platform tcam errors privileged EXEC command provides information about
the TCAM memory consistency integrity on the switch.
Displaying TCAM Memory Consistency Check Errors
Beginning in privileged EXEC mode, use this command to display the TCAM memory consistency
check errors detected on the switch:
Command
show platform tcam errors
This example shows information about the TCAM memory consistency integrity on the switch:
Switch# show platform tcam errors
TCAM Memory Consistency Checker Errors
--------------------------------------
TCAM Space Values Masks
Unassigned 0
HFTM
HQATM
Switch#
The display provides information about TCAM portions that were checked for integrity.
Table 33-3
Column
Values
Masks
Fixups
Retries
Failures
OL-23389-01
Unassigned space: Unassigned TCAM table entries for the current SDM template.
Hulc Forwarding TCAM Manager (HFTM) space: Related to the Layer 2 and Layer 3 forwarding
tables.
Hulc Quality of Service (QoS)/access control list (ACL) TCAM Manager (HQATM) space: Related
to ACL and ACL-like tables such as QoS classification and policy routing.
Fixups Retries Failures
0 0
0 0 0
0 0 0
Details of Checked TCAM Portions
Description
The number of invalid values found in the TCAM tables.
The number of invalid masks found in the TCAM tables.
The number of initial attempts to fix the invalid values or masks.
The number of attempts to fix the invalid values or masks.
The number of failed attempts to fix the invalid values or masks.
Purpose
Displays TCAM memory consistency check errors in the Hulc
QoS/ACL TCAM Manager (HQATM), Hulc Forwarding TCAM
Manager (HFTM), and unassigned spaces on the TCAM.
0 0
0 0
0 0
Catalyst 2928 Switch Software Configuration Guide
Memory Consistency Check Routines
33-23