[CAUSE] A tBgpMaxNgPrefixThreshReached notification is generated when the number of routes learned from the peer has exceeded tBgpPeerNgMaxPrefixThreshold percent of the configured maximum (tBgpPeerNgMaxPrefix). tBgpMaxNgPrefixThreshReached replaces notification object tBgpMaxNgPrefix90 as the latter limits the threshold to 90 percent. [EFFECT] No direct effect but if the peer continues to advertise more routes then the number of routes may exceed the configured maximum (tBgpPeerNgMaxPrefix). in that case the peer would just be disabled. [RECOVERY] Increase the max-prefix for this peer. This notification is obsoleted in release 13.0.