他们机房被攻击，核心设备挂了，然后计划某天进行设备版本升级了
We will be performing maintenance on our core routers in Denver on May 1st, 12:00am-3am CST
We will be upgrading version of IOS to deal with recent performance issues we have been experiencing in Denver for past few weeks.
The routers might have to be rebooted during the maintenance window which may cause 5-10 minutes of network downtime
Thank you
FDCServers
