https://www.cisco.com/c/en/us/td/docs/routers/access/800/firmware/release/notes/VDSL2/A2pv6C038q_and_B2pvC038r1.html
Release Notes for Firmware Release A2pv6C038q and B2pvC038r1 - Cisco
Release notes for Cisco 886, 887, 896, and 897 VA Series Multimode VDSL2/ADSL2/2+ DSL Routers using firmware releases A2pv6C038q and B2pvC038r1
release notesfirmwarecisco