Adding a Unit to an Operating Stack

1. Make sure that the redundant stack link is in place and functional. All stack members should be connected in a logical ring.
2. Preconfigure the new unit, if desired.
3. Install the new unit in the rack (assumes installation below the bottom-most unit, or above the top-most unit).
4. Disconnect the redundant stack cable that connects the last unit in the stack back up to the first unit in the stack at the new position in the ring where the new unit is to be inserted.
5. Connect this cable to the new unit, following the established order of connections. In other words, use the redundant stack cable to connect from the first box in the stack to the last.
6. Power up the new unit. Verify, by monitoring the manager unit console port, that the new unit successfully joins the stack by using the show switch command in EXEC mode. The new unit should always join as a "member" (never as manager; the existing manager of the stack should not change).
7. If the 200 Series software version of the newly added member is not the same as the existing stack, update the software image.