Release Notes

4. Installation, Upgrade, and Configuration Changes
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4.2.1 License Renewal
Upgrading to Extreme Management Center version 8.5 requires you to renew your NMS
license if generated prior to July 31, 2020. Licenses generated prior to July 31, 2020
expire 90 days after upgrading to Extreme Management Center version 8.5.
4.2.2 Upgrading Hardware
When attempting to upgrade the Extreme Management Center server, the
ExtremeAnalytics engine, or the ExtremeControl engine to version 8.5, the upgrade
might not complete successfully. If the upgrade is not successful, begin the upgrade
again.
4.2.3 Free Space Consideration
When upgrading to Extreme Management Center version 8.5, a minimum of 15 GB of
free disk space is required on the Extreme Management Center server.
To increase the amount of free disk space on the Extreme Management Center server,
perform the following:
l Decrease the number of Extreme Management Center backups (by default, saved
in the /usr/local/Extreme_Networks/NetSight/backup directory).
l Decrease the Data Persistence settings (Administration > Options > Access
Control > Data Persistence).
l Remove unnecessary archives (Network > Archives).
l Delete the files in the <installation
directory>/NetSight/.installer directory.
4.2.4 Site Discover Consideration
Discovering devices via the Site tab using a Range, Subnet, or Seed discover might not
successfully add all expected devices. To correct the issue, increase the Length of
SNMP Timeout value on the Administration > Options > Site tab in the Discover First
SNMP Request section.
4.3 ExtremeAnalytics Upgrade Information
Enabling or disabling the disk flow export feature might cause enforce operations to time
out. Enforcing again resolves the issue.