Note:The ER-X/ER-X-SFP/EP-R6 has more limited storage, and in some cases upgrade may fail due to not enough space. If this happens, remove the old backup image first (using "delete system image" command, seeherefor more details) before doing upgrade.
More details can be found in the release notes below. Please give it a try if you are interested in the new features/changes to help us test them so that we can get the release out sooner! Thanks very much!
[Release Notes v1.9.7+hotfix.4]
Changes since v1.9.7+hotfix.3
Enhancements and bug fixes
[PPPoE client] Fix bug when asterisk char (*) was not allowed in PPPoE username.
[PPPoE server] Fix bug when PPPoE server was randomly denying client reconnect attempts after session expiration.
Updated software components
[Dnsmasq] - Upgrade dnsmasq to 2.78 to fix multiple security vulnerabilities (CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496, CVE-2017-13704). Discussedhere