Cisco Cisco IOS Software Release 12.4(2)T

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ACL Support for Filtering on TTL Value
Customers may use extended IP access lists (named or numbered) to filter packets based on their 
time-to-live (TTL) value, from 0 to 255. This filtering enhances a customer’s control over which packets 
reach a router.
History for the ACL Support for Filtering on TTL Value Feature
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at 
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Contents
Restrictions for ACL Support for Filtering on TTL Value
This feature does not support turbo access lists.
Release
Modification
12.4(2)T
This feature was introduced.