Removing and Replacing a Cisco ASR 1001-X Router SPA
The online insertion and removal (OIR) feature allows you to install and replace shared port adapters (SPAs)
while the router is operating, you do not have to shut down the system’s power, although you should not run
traffic through the shared port adapter while it is being removed. OIR is a method that is seamless to end users
on the network, maintains all routing information, and preserves sessions.