RS01 (206.71.12.4 and 2001:504:40:12::1:4) will be taken offline for updates. BGP sessions to it will drop, but RS02 will remain up.
Once RS01 has fully recovered and all BGP sessions have been established, RS02 (206.71.12.5 and 2001:504:40:12::1:5) will be taken offline for updates. BGP sessions to it will drop, but RS01 will remain up.
If you peer with both route servers, you should see no impact to your traffic.
We will also use this opportunity to update
atl.communityix.org and
www.communityix.org.