[CAUSE] The tBgp4OptTransWithdrawnRoutes notification is generated when the processing of optional-transitive path attribute results in the withdrawal of the routes included in the BGP update. This notification was obsoleted in R11.0 and replaced with the notification tBgp4WithdrawnRtFromUpdateError. [EFFECT] This notification has no direct effect. The withdrawn routes are logged to aid debugging and tracking back the root cause of the problem. [RECOVERY] There is no recovery required for this notification.