Server 2003, XP Worksta’s - network slow after ISP change
Following in the footsteps of others with issues in network speed I too have been suffering from degradation in speed after switching ISP’s.
Server 2003 SP3, uses AD, 6 SCSI disks RAID2 split into 3 drive letters- Disks are about ¾ full and are defragged and cleaned weekly. AV is Symantec on the server, running different AV on Workstas.
Level3 ISP, Altatel Metro Switch @ 100Mbs Full Dup, Fortinet Firewall stateful packet inspection, followed by Cisco SG200-26 port switch using default ip on network (scheme 192.168.x.x)
XP Pro Sp3 (HP EliteWB 8730W) patches applied, NIC set for 100Mbs FD, all hard wired to network via Cat5e cable installed by certified installer.
Over the last few years we used Verizon as ISP, but after several problems with their billing we got fed-up and decided to go with a different provider. During this time we only had a T1 connection, with very few issues in network speed (we used Verizon DNS settings on the firewall in DHCP), however, after changing to Level 3 (buying a 10Mbs circuit) we have had dramatic changes in speed in file transfers Large files 1gig take almost an hour to move from worksta to Server share). I verified the switch settings with the L3 engineers, then had the Fortinet engineers assist in changing setting in the firewall, then since the old switch was a Netgear dumb hub (10/100) I installed the Cisco 10/100/1000 switch. Verifying that the speed at the switch was correct, I connected a laptop to the Alcatel tested the speed (10mbs up and dwn) then moved to put the firewall in the loop (speed dropped a little on the up load to 6mbs, 8mbs on the dwn), then inserted the switch testing again (speed drops to about 1mbs upld/8mbs dwn).
I doubled checked DNS (no WINS servers), the NIC speed, added a DNS for L3 of 184.108.40.206, as secondary, primary is 220.127.116.11, and still files of over 1gig take close to an hour.
I would be happy to treat someone to a steak dinner if you can help with this (as determined after the fix)