I hope you can help.
I have a Cisco 3750 switch stack connected to an Extreme Networks switch via 2 fast ethernet ports.
On both switches the speed and duplex have been set to 100/Full.
The Cisco 3750 switch is acting as the root bridge, and I see both ports are in 'FORWARDING' mode. The Extreme network switch has one port in FORWARDING and the other in BLOCKING, as I would expect. However when I run a constant ping to the Extreme Networks switch I lose approx 3/4 packets at 1 minute intervals. When I remove the 'BLOCKING' connection between the switches there is no packet loss.
Any help would be greatly appreciated!