Network Slow
 

we have this config
Cisco B( ppal Switch)cat4506-192.168.1.46
we have 2 vlans (1 and 12 )
in the floor we have 3 switches connected to the cisco B with Fiber
Cisco C - cat6513 ,
Cisco D - cat4506
Cisco E - cat 4506
the clients need to download software from our servers.
The cisco C works faster
but the Cisco D and E works slow .
we compare the ports configuration and its the same .
what we can improvement to make this couple sitches works faster as cisco C..
Thanks in advanced