PTP over MRPThis feature achieves precise time synchronization with hardware timestamping

Release Notes for Cisco Catalyst IE3x00 and IE3100 Rugged, IE3400 Heavy Duty, and ESS3300 Series Switches, Cisco IOS XE 17.18.x

New software features

• PTP over MRP
  This feature achieves precise time synchronization with hardware timestamping, while MRP ensures fast network recovery—enabling reliable and consistent operations.
• Product Analytics
  Cisco IOS XE Product Analytics collects device Systems Information for the purposes of understanding product usage, enabling product improvements and product development, and assisting in product adoption and sales support. Only summarized data of feature usage and statistical counters of configuration are collected. No personal identifiable information, such as MAC/IP addresses, usernames, custom configuration names, or user provided strings, are collected as part of Cisco IOS XE Product Analytics. Cisco processes this data following the General Terms, the Cisco Privacy Statement, and any other applicable agreement with Cisco.

Resolved issues

• CSCwn24555
  IE3100: Duplex Mode Shows as "Half" Despite Configuration is set Full Duplex along with 10/100 Speed.
• CSCwn98466
  IE3100 - Major Alarm Relay Fault due to Over temperature Spike
• CSCwn62607
  IE3100-PN connect issues due to out of AR resources
• CSCwj82708
  Intermittent network connectivity with interfaces with speed/duplex of 100/half.
• CSCwn47744
  Device not able to ping on trunk port when "vlan dot1q tag native" is configured globally.
• CSCwo15432
  PTP stop working after ACL with permit ip any any
• CSCwo33351
  IE3xxx: Observed "rep bpduleak" CLI in Latest image
• CSCwn65142
  Disable REP NEG as REP ZTP functioning incoherent
• CSCwn48091
  DHCP Client on PVLAN does not receive IP address from DHCP server and unable to reach its gateway
• CSCwo60140
  DHCP Client on PVLAN does not receive IP address from DHCP server in MAC move case
• CSCwj68054
  MAT event not working on EEM for IE3400 switches
• CSCwn88892
  %IMSP_ACLMGR-3-INVALIDACL: Add access-list failed error on IE3400 switches

Open issues

• CSCwp84508
  Device with IPv6 ACL on 13+ Interfaces crashes on reload.
• CSCwq27349
  IE3400 configured for HSR/PRP, when copper interface 1/3-4 set to 100mb HSR PTP tag missing.
• CSCwp38345
  DHCP snooping dropping DHCP discover message for non-CDP devices.