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Cisco Cisco IOS XE 3.5E

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Release Notes for the Catalyst 4500-X Series Switches, Cisco IOS XE Release 3.9.xE
New and Changed Information
New and Changed Information
The Cisco IOS XE Release 3.9.xE Documentation Roadmap provides quick and easy access to all 
relevant documentation for specific platforms. Look for Quick Links to Platform Documentation on the 
respective platform documentation pages. For more information, see 
New Features in Cisco IOS XE Release 3.9.xE
New Hardware Features
Table 5
New Hardware Features in this Release
New Software Features
Feature Name
Description
10 Gigabit Ethernet (GE) SFP+ 
CWDM Transceivers
Support for the following 10 GE SFP+ CWDM transceivers on Cisco Catalyst 4500-X 
Series Switches:
•
CWDM-SFP10G-1590
•
CWDM-SFP10G-1570
•
CWDM-SFP10G-1530
•
CWDM-SFP10G-1510
•
CWDM-SFP10G-1550
•
CWDM-SFP10G-1470
•
CWDM-SFP10G-1610
•
CWDM-SFP10G-1490
Table 6
New Software Features in this Release
Feature Name
Description
Downshift Support on Multigigabit 
(mGIG) Ethernet Interfaces
Introduces support for downshifted or lowered speeds on mGIG interfaces, 
automatically, if the link quality is poor or if the link is continuously down.
(LAN Base, IP Base, Enterprise Services)
MKA MACsec Enahancements
•
Supports MKA MACsec Pre-shared keys (PSKs) that are used to generate 
Connectivity Association Keys (CAKs), Key Encryption Keys (KEK), and 
Integrity Check Value Keys (ICK), when configuring switch-to-switch links.
•
Supports port channels
(Enterprise Services)
Multicast VLAN Registration
The maximum number of supported MVR groups is now increased to 1500.
(LAN Base, IP Base, Enterprise Services)