We are running RedHat Linux AS 3.1. We wrote an app to transmit udp data via multicast over our network. The problem is, every 600 seconds some service launches and causes us to lose hundreds of consecutive packets on all machines receiving the data. We have Googled the internet and searched for various culprits, but with no luck. What services could be occuring every 600 seconds that would cause this probelm? Also, it is always EXACTLY 600 seconds, we verify this through the udp packet timestamps.