Switch problem? Can ping but cant surf...usually
Switch problem? Can ping but cant surf...usually
(OP)
I've been going round and round with this problem. I have a 3com superstack 3 3300XM switch connected to a DSL router/modem and to several workstations. If I connect a workstation to the DSL its super fast... works great. If I connect through the hub then usually I cant browse the web. I can PING the web ... ie PING www.google.com or PING 4.2.2.1 and get good response. Sometimes I can browse, so it seems a performance issue. I set the switch to have an IP and subnet within the confines of my network scheme and set the ports at 100/full. COVAD wont help.. they say it works perfectly. 3Com wont help.. they want to sell me a contract. Microsoft..well you know. Any ideas? I am also running spy-bot and AVG antivirus. It doesnt seem to be clogged (the activity lights would be going nuts if I was spamming myself out of commission)





RE: Switch problem? Can ping but cant surf...usually
#2 Try removing all filtering on the switch, or temporarily try an unmanaged switch. If you had a small Linksys or Netgear 5 port switch lying around, (never a bad idea), you could attach a few workstations to see if there are performance issues then.
#3 If the switch has SNMP built in, look at the port stats to see if you have a heavy user on the line eating up your available bandwidth.
#4 Ping between machines with various paket sizes, and try to FTP some large files around your LAN to see if there may be a LAN issue, or if it is jut the WAN interface.
RE: Switch problem? Can ping but cant surf...usually
Have you been out to 3com to find a code upgrade?
What type of DSL router is it?
RE: Switch problem? Can ping but cant surf...usually
Hope this helps.
Mike Smith
Net-Consul-Team, LLC
RE: Switch problem? Can ping but cant surf...usually
You said that connecting the DSL cable directly to a workstation, it worked fine. But after connecting to a hub, nothing came out. It must be the hub. Get something better like a netgear switch with several ports on it. It is auto-sense, so you need not configure it for duplex, 100 bps, etc. The hub must be a old unit that doesn't have an autosense feature.
The hub or switch should act as a transparent device. If it works without a hub, then it should work with the hub, unless you have problem with the hub or cables.
RE: Switch problem? Can ping but cant surf...usually
DNS resolves the Ip address into domain name.
If you have a firewall, do you have NAT included? NAT translates the local IP to an IP outside the network.
We need to know more info to diagnose where the problem is.
RE: Switch problem? Can ping but cant surf...usually
I guess I overthought the problem a little more than necessary.
Thanks,
David