It is understood a number of tractors and farm vehicles are parked at the entrance to the Lidl regional distribution centre near Nutts Corner.
There have been several protests by farmers about the slump in milk prices in recent weeks.
These have been held across the UK.
Earlier on Tuesday, Northern Ireland Agriculture Minister Michelle O'Neill met Environment Secretary Liz Truss in London to seek support in lobbying the European Union over the dairy crisis.
Around 50 people are protesting outside a supermarket depot in County Antrim, calling for a fair price for farm produce.