IPcelerate is requesting that ip multicasting is enabled before they install their ipcelerate server. When I asked for a sample config, they point me to Cisco's website. We have a 2821 gateway at each site(4 sites connected via a metroE-connection), 3560s and 3548s. They have stated the 3548s will work with an upgrade. Approximately 400 phones. Does anyone have a sample config with multicasting in a ipclerate environment? Thanks in advance for any assistance you may provide.