[CAUSE] The tmnxTwampSrvPfxMaxConnsExceeded notification is generated when a TWAMP control connection could not be established by the TWAMP server because the maximum number of concurrent TWAMP control connections configured against the TWAMP client's prefix (tmnxTwampSrvPrefixMaxConnections) has been reached. [EFFECT] The TWAMP client cannot request test runs on the rejected connection. [RECOVERY] Configure the prefix's maximum number of concurrent TWAMP control connections to a larger value, or disconnect a TWAMP control connection which uses the prefix.