No new features - maintenance only

New Feature

There are no new features with this release. It is maintenance only.

Known Limitations

Smart Licensing Using Policy

Starting with Cisco IOS XE 17.6.1, with the introduction of Smart Licensing Using Policy, even if you configure a hostname for a product instance or device, only the Unique Device Identifier (UDI) is displayed. This change in the display can be observed in all licensing utilities and user interfaces where the hostname was displayed in earlier releases. It does not affect any licensing functionality. There is no workaround for this limitation.The licensing utilities and user interfaces that are affected by this limitation include only the following: Cisco Smart Software Manager (CSSM), Cisco Smart License Utility (CSLU), and Smart Software Manager On-Prem (SSM On-Prem).

Expansion Module on the IR1101

The expansion module IR1101 does not support +1500 MT size on LAN interfaces. See this Caveat for details.

Standalone MAC Authentication Bypass (MAB) Limitation

Standalone MAC Authentication Bypass (MAB) is an authentication method that grants network access to specific MAC addresses regardless of 802.1X capability or credentials. The IR1100 crashes with concurrent IPSec traffic and macsec traffic (device to client).

Caveats

Open Caveats

CSCwf42477

WAN port LED is not turning off when we shut interface with media-type sfp.

CSCwd58723

IR1100 crashes with concurrent IPSec traffic and macsec traffic (device to client).

Resolved Caveats

CSCwi02277

Router crashing because of TDL memory leaks.

CSCwf74518

APN Profile change in controller context config doesn't take effect.

CSCwf24237

Virtual IP not responding to ICMP request on IR1101.

CSCwh10876

IR1101 : Ping is not successful after reload the device with switchport config in gi0/0/0

CSCwh46672

Cannot configure G0/0/0 interface on IR1101 using default vManage feature templates.