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Setting up switches with SFP

I have noticed that there is quite a bit a latency on my network and I think that it has to do with my switches.  I have 2 Netgear GS724t and 2 GSM7224 switches.  They all have SFP connectors and the GSM7224 switches came with modules for the SFP.  I was thinking that it would be best if I daisy chained them through the SFP to resolve my issues, but I am clueless on how to even install these or where to even get the wire and what wire at that.  Anybody have a clue?
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adrienne73
Asked:
adrienne73
2 Solutions
 
giltjrCommented:
How much latency are you talking about?

How are they connected now?

Putting them in a daisy chain will create a spanning tree loop and will cause one of the interfaces to be shut down.

I don't know what you have connected to what, but a tree setup may be better.  One "central/main" switch and all the other switches connected to it.

SFP will not reduce latency.  Now, SFP are generally used for gigabit connections.  Both your switches are gigabit switches, so the connection you now have between the switch should already be gigabit.  So going from copper gigabit to fiber gigabit will not reduce latency.

Check the port that you are currently using to make sure they have connected at gigabit and full duplex.

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adrienne73Author Commented:
I haven't exactly measured the latency, but I do have users experience definite times of slowness.  

As for the tree setup, that is what I have right now.  If I actually had stackable switches would that have been a better way to go?

I am not in the vicinity of the switches right now, but will check them tomorrow to see that they are gigabit and full duplex.
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giltjrCommented:
You need to figure out the latency.  Typically in a switch LAN enviroment latency should be under 1ms.  Even if it went as high as 5 or 10 ms, most users would not notice.

In my LAN (about 500 desktops and 50 servers) when ever we have slowness, 99.99999% of the time the server is having problems.  Only once were we having "slowness" on the LAN and it was the network.  Even in that case it one accessing servers that were on the same switch.

The switch had issues and was misconfigured.  All the ports were mistakenly configured as trunks ports and when ever a server was rebooted all of the ports were going through spanning tree learning.  Changed the ports to access mode and problem was resloved.
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mikecrCommented:
The biggest culprit of latency on a network is a misconfigured switch port for speed and duplex. If the network card in the computer is running at 100/half lets say, and the switch is trying to negotiate 100/full, then the machine will have hundreds of collisions and constantly be retransmitting which would cause the slowness from the end users perspective. Try hard coding spead and duplex settings on the switch and workstion and also any servers that the user is talking to or internet connections that may be plugged into the network and see if there is an improvement. The small form factor SFP uplinks are not going to increase your performance any better, it's just a different way of hooking switches together.
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modus_operandiCommented:
Question split.

modus_operandi
EE Moderator
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