Hi Guyz

Can we have a 10/100/1000 switch on the sub-LAN, where all the other components of the network are 10/100 only...
would it clash / collide and create trouble networking? All are working fine except those that branch from this switch..

Only a few new laptops have this 10/100/1000 network cards you know...
( Ours is a big network and connected thro' switches every 80 mtrs and we use CAT 5E cable)

They work at lowest protocols.

If Some components are only 10/100......your 1000 Type switch will still work at 10/100

Thank you, but despite all efforts, they are not able to connect consistently with the ERP server...may be there is one more reason I need to explore.. they belong to another domain..but all the protocols are OK..let me see
Thanx anyway for your quick reply

The problem is you have too many routers.

Try to invest in Industrial routers.

Or There's one more thing you can try...
Each router has a DHCP server to distribute IP adress and mach then with MAC codes on each network card.

Keep only ONE DHCP server runnning....disable the DHCP for other routers except main.