Cisco 10000 - Manual (Page 490)

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Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 22 Configuring Template ACLs
Configuration Examples for Template ACLs
access-list template Command History
access-list template Command Modes
Use this command in global configuration mode.
Usage Guidelines for the access-list template Command
Reducing the number of rules for Template ACL status can lower CPU utilization. The process of
checking each ACL against other known ACLs in the system is easier if the matching task can be aborted
earlier. However, if you set the number too low (smaller than the largest “similar” Attribute 242 ACL),
CPU utilization can go very high, because ACLs that previously would be considered as Template ACL
duplicates are now sent to the PXF without regard to other ACLs already in the router.
Setting the number of rules higher can increase CPU utilization, because the comparison task takes some
CPU.
Note Changes in CPU utilization occur only during session initiation. Steady-state CPU utilization is
unaffected by these changes in ACL processing.
Examples
The following example specifies that ACLs with more than 50 rules will be considered for Template
ACL status:
Router# access-list template 50
show access-list template Command
To display information about Template ACLs, use the show access-list template command in EXEC
mode.
Command Purpose
Router(config)# access-list template number Enables Template ACL processing.
number specifies the maximum length of ACL that should be
considered for template status. Only ACLs with number or
fewer rules will be considered for template status.
If the number variable is omitted, the default of 100 will be
used, and only ACLs with 100 or fewer rules will be
considered for template status.
Default is 100 rules.
Cisco IOS Release Description
12.2(28)SB This command was introduced on the Cisco 10000 series router.