i have internet connection 2mb on hp router framrelay conection on hp router router one serial port is coneted to inter net and hp eth port goes to firewall port,anoter firewall port goes to switch, and 2821 another router ethernet port goes to same switch,and having 4 serial ports having goes to multi links to 4 branches,on 4 remote branches i having routers and each branch i having 100,100,100,250and main branch 250 users in this senario i wnat to configure my all network setup .plz suggest me best configration.