InterfaceTraffic_Daily
Also InterfaceTraffic_Hourly and InterfaceTraffic_Detail depending on the timeframe.
There data may only in one of these tables. i.e. until it's rolledup from hourly into daily, it only exists in the hourly table.
note: This particular design oddity (present in some tables) forces the person querying the database to know which table to use over which timeframe and to combine multiple tables into a single query. This then forces a calculation on the database engine. e.g. if I want the daily traffic graphs for the past three months I have to include all three tables and dynamically aggregate the data from two of them, instead of simply querying the daily table, and it including the data for all days, with as much of today's traffic as had been measured.