NBX phones on Netgear GS748T switches

[meyery2k]

New GS748T switches.  Some phones (always the same ones) will stop working after a couple of hours.  Rebooting phone or PC connected to phone will restore service for a few hours.  Any ideas?  NBX V3000 running 6_0_63.  IP on the Fly due to remote phones and VTL sites.   Phones are directly connected to switch.  No VLAN or COS set up at present.  Spanning Tree enabled.  Moving phones to a different switch and no trouble.   Any help appreciated!!! ~ Mike

[JacksonW3]

Mike - 

FYI - I have been implementing that same switch on several systems without issue.  Hope this is not going to come back and bite us (me).  Please post how it is resolved.

[Justin_Goldberg]

Certain Netgear switches have multicast issues. I'd check the firmware level and see about updating it.