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Jul
3
comment Choosing network topology for top performance
I don't think in this case you'd ever be able to load balance across more than 2 links. You can't do LACP to 2 different remote switches, so you'd be doing 2 LACP groups and the server would only ever use one of those links at a time. I'd switch to a 3 and 1 and see if win2k3 allows you to bias to the 3 link LACP. Better performance in most situations and the system is still reliable if a single switch fails.
Jul
3
answered Choosing network topology for top performance
Jul
2
answered How do you deal with server noise? Hearing loss?
Jul
2
comment Running TFTP Server on specified port
does the client accept instructions that it connect on a different port? How hard would it be to update the client to use a different port? Changing the server's port is trivial -- it typically runs out of inetd/xinetd and can be told to start on any port you want.
Jul
2
comment Running TFTP Server on specified port
The trick is getting the client to connect to the tftp server on the non-standard port. It's either trivial or really really hard, depending on the level of stupidity of the client.
Jul
1
comment Are there any vendors making a Gigabit Fiber solution for laptops?
@romandas: Ethernet isn't like an old modem that varies the speed according to the available bandwidth. Ethernet works or it doesn't. If it doesn't you either get media errors which cause your throughput to fall through the floor or you don't get a link. If you get no errors with cat 5, you'll have the same bandwidth as if you use cat6. Bet you a beer on that one... Wish this silly interface had private messages...
Jul
1
comment Are there any vendors making a Gigabit Fiber solution for laptops?
That's the boring way to solve the problem! He'd need to make sure to get the proper sort of converter (multimode / single mode / etc)
Jul
1
revised Are there any vendors making a Gigabit Fiber solution for laptops?
added 4 characters in body
Jul
1
comment Are there any vendors making a Gigabit Fiber solution for laptops?
@romandas: the gigabit ethernet spec requires that it function over cat5. Many older cat5 sites are not actually cat5 and still work at 100mb because it is more tolerant than gig, but if the wire plant tests out fine at cat5 specs, it will work at gig just as well as if you use cat6. networkworld.com/news/tech/2000/1016tech.html and en.wikipedia.org/wiki/Gigabit_Ethernet#1000BASE-T
Jul
1
comment Are there any vendors making a Gigabit Fiber solution for laptops?
laptop expresscards are 1 lane of pci express, which is 250MB/sec in each direction, which should allow you to snoop up to 2 flat out 1gig ethernet links. If you use a card that does IP in the card and allows you to put filters on the card, that should even allow useful monitoring of 10gig links, though clearly not the full pipe.
Jul
1
revised Are there any vendors making a Gigabit Fiber solution for laptops?
added 4 characters in body
Jul
1
comment Are there any vendors making a Gigabit Fiber solution for laptops?
Do you have the shiny briefcase? If you go with the magma box and already have gig pci express cards it's actually not too pricy... Get a card with 2 interfaces so you can tap both directions at the same time.
Jul
1
revised Are there any vendors making a Gigabit Fiber solution for laptops?
added 274 characters in body
Jul
1
answered Are there any vendors making a Gigabit Fiber solution for laptops?
Jul
1
awarded  Critic
Jun
30
revised How to diagnose network speed issues in a Microsoft environment?
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Jun
30
comment How to diagnose network speed issues in a Microsoft environment?
The parent needs to test performance from one subnet to the next and from hosts inside the each subnet to each-other. That will isolate if it is an L3 problem or an L2 / L1 problem. Swapping cables isolates an L1 problem and looking at the interface error counters on each side of the link (switch & host) to isolate L2. Even 10/half is way way faster than the speed one of the hosts observed, which leads me conclude L2 errors which will destroy TCP/IP throughput under load.
Jun
30
comment How to diagnose network speed issues in a Microsoft environment?
@evan: Most mid-tier and better managed switches do static routes at near wire-speed. They won't do OSPF or other dynamic routing protocols but they're totally able to shovel traffic from one vlan to another at the same speed they shovel traffic from one L2 interface to another. No need for a fancy router if you're just doing static routes between subnets.
Jun
30
comment How to diagnose network speed issues in a Microsoft environment?
What is the output of "netstat -e" ? DNS issues would only cause the initial part of the transfer to be slow, not the whole thing.
Jun
30
answered How to diagnose network speed issues in a Microsoft environment?