Cisco Cisco IOS Software Release 12.4(9)T

 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a 
specific command, see the command reference documentation.

Cisco IOS software images are specific to a Cisco IOS software release, a feature set, and a platform. 
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at 

. You must have an account on 

Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at 
the login dialog box and follow the instructions that appear.

 lists only the Cisco IOS software 

release that introduced support for a given feature in a given Cisco IOS software release train. Unless 
noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and 
figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and 
coincidental.

Copyright © 2006 Cisco Systems, Inc. All rights reserved

.

FRF .20 Support 

12.4(9)T
12.4(11)T

This feature provides support for FRF .20. Support for IETF 
encapsulated DLCIs is also provided with this feature.

In Cisco IOS Release 12.4(11)T, support for ECRTP was 
added, and the ability to enable IPHC on a specific PVC was 
added.

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Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity,
Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, Follow Me Browsing, FormShare, GigaDrive, HomeLink, Internet Quotient, IOS,
iPhone, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, iQuick Study, LightStream, Linksys, MeetingPlace, MGX, Networkers,
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All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a
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