Networks
I've got about 35-40 pc's on a windows 2000 domain
We have a couple of 10/100 hubs and a 10/100 switch, in monitoring the switch we have found that the average packets per sec are 2,000 - 15,000. I'm wondering if any one else has had this problemand what they did to fix. Any info would be great.
by ann777
You really haven't given us enough info in order to be able to help you.
If you're convinced that the switches are the bottleneck, then either add switches or add RAM to the switches in order to decrease re-transmissions.
What are your server specifications?
by brad.bergen
Not exactly sure what information you need about the servers.
I'm pretty convinced that it's the switch, just wanted a second opinion
by sgt_shultz
are all the pc's slow or just a few?
you could try locking down the nic's to 10mb half duplex to see if that improves speed. the autonegtiation can cause a lot of traffic. do you have a lot of collisions?
by brad.bergen
I've changed every NIC that I have to 100 MB / Half duplex
and all the ports on the switch too.
Still have the switch maxing out though
by alpha-male
To start off, I'd take a look with a packet sniffer at what is going on. If you don't have Sniffer Pro or EtherPeek, go to www.ethereal.com where you'll find a great sniffer that's FREE. The help files and documentation are great also.
What you need to know is not just how many packets you have, but what kind of packets they are. If you have tons of ICMP, SNMP packets then the problem isn't with the switch, it's with your network (wasting bandwidth). You need to get a pulse for what's going on with the LAN...and the sniffer is the way. 15,000 pps to me is a huge amount for the number of users you have. I suspect you have devices that are "chattering" far more than necessary or even "rogue apps". Napster for example used to be the bane of admins everywhere for devouring bandwith and being extremely inefficient in how it did it - the old double whammy.
Have you done a baseline on you LAN? Take a look at it and the traffic. You may even want to monitor traffic over a weekend or late night to see what kind of broadcasts etc you are getting. It may be that your users send and receive massive amounts of data...but it may also be that there is a lot of wasted packets...maybe even a malfunctioning device.
If the LAN is fine andthe traffic is what you expect to have there (not a ton of broadcasts, unanswered requests, retransmissions etc) then the answer would be to add another switch, upgrade your switch or, better yet, to use a router (or bridge) to separate out the busiest parts of the network into separate collison domains.
by brad.bergen
replaced the switch
fixed all the issues and gained to Gbps ports.
by scottsman
by brad.bergen
Yes, but I think I found the problem, replaced the switch
fixed all the issues and gained to Gbps ports.
by brad.bergen
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