Our Sydney Vocus links have been dropped while we perform some work with Vocus. Any traffic single-homed to Sydney will flow via other paths. If you're anycasting traffic from Sydney and other cities in Australia, you may find that ~30% of your Sydney traffic (anything connected via Vocus) may go to Vocus links in alternate cities (likely Melbourne if you're announcing there).
We will let you know once the Vocus links have returned in Sydney (may be be a day or two)