Scheduled Service Change: WAN Router Code Upgrades
All services will fail over and wide-area network connectivity will be intermittent for periods up up to 30 seconds for each upgrade as routing protocols converge.
There is no workaround for this issue
On Sunday, April 22nd between 5am and 7am, CIT Infrastructure will upgrade the code on 3 wide-area routers to the latest maintenance release. These routers support redundant connectivity to both the commodity Internet and Internet2. During this maintenance window there will be 3 brief (30 second) periods of intermittent off-campus connectivity as routing protocols converge.