What is the default NMSP echo interval between a Mobility Services Engine and Wireless LAN Controller?

30 seconds is not the default NMSP echo interval; it is longer than the actual default value.

NMSP (Network Mobility Services Protocol) uses a default echo interval of 15 seconds to maintain the keepalive relationship between the MSE and the WLC. This interval controls how frequently heartbeat messages are exchanged to verify the NMSP connection is still active.

10 seconds is not the default NMSP echo interval; it is shorter than the actual default value.

60 seconds is not the default NMSP echo interval; this value is too long and would result in slower detection of connection loss.