Magento 2.1.18 is the final 2.1.x release. After June 2019, Magento 2.1.x will no longer receive security patches, quality fixes, or documentation updates.
To maintain your site's performance, security, and PCI compliance, upgrade to the latest version of Magento.

After Migration

After you have completed your migration and thoroughly tested your new Magento 2 site, perform the following tasks:

  • Put Magento 1 in maintenance mode and permanently stop all Admin activities

  • Start Magento 2 cron jobs

  • Flush all Magento 2 cache types

  • Reindex all Magento 2 indexers](/devdocs/2.1/guides/v2.1/config-guide/cli/config-cli-subcommands-index.html#config-cli-subcommands-index-reindex){:target=”_blank”}

  • Change DNS, load balancers, etc. to point to Magento 2 production hardware

Updated