Cable modem-->Cisco ASA5510-->Netgear 48 port switch.
All workstations running Windows XP, with the exception of one laptop with Vista. We are experiencing a slow Internet connection with ping times varying from 100ms-400ms. Ping times to workstations and servers within our network are normal. Ping times early in the morning before staff arrives, normal. Ping times return to normal in the evening when only a couple of work stations are still active.
The following is what has been done so far to try and find the problem:
Reset cable modem, Cisco ASA5510 and Netgear switch and all subsequent switches in our network. No change.
Connected directly to cable modem, ping times to Internet are normal.
Experienced high ping times while directly connected to Cisco ASA5510. If Cisco is the culprit, why normal ping times before everyone arrives and after everyone leaves?
Monitored ping times while unplugging each workstation from Netgear switch. No change.
Today found one possibly malfunctioning NIC card on a server. Switched to another card, no change.
Swapped out Netgear switch, no change.
Will try bringing one workstation at a time online in the morning.
We are a non-porfit organization, so resources are slim. It has been a couple of years since I used Wireshark, so I will require some quidance with it.