I have such network below:
there were one intel 550t , three intel 510t switch ,there were be stacked together, intel 550t has limited 3 layer routing function ,510t is layer 2 managable switch ,another link is a cisco 2924 switch.
recently i purchace one 3550-emi switch , i want use it as the main layer 3 switch to enchance my lan . I setup a four port trunk to intel switch (encap dot1q), but it can't no ping any hosts connect in the intel switch. the connection between 2924 and 3550 working correctly .
would someone tell me the possible reason?