What is the impact of service backup on terminal access under hierarchical AC networking？

What is the impact of service backup on terminal access under hierarchical AC networking？

The current hierarchical AC networking authentication and forwarding scheme only supports two cases：

1) authentication point in Central + forwarding point in AP;

2) authentication point and forwarding point are in Local.

Local-ac and central-ac disconnected case, will ensure that the online users are not affected, not interrupted. If the user can come back online depends on the network configuration:

1)      if the central-ac authentication + AP local forwarding, the user is unable to come online, so the user disconnected wireless can not access;

2)      if the local-ac authentication + local-ac forwarding, should be unaffected, the user disconnected wireless can again authenticate online successfully.