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Network Bandwidth?

By jlbecker67 ·
Our network is connected to a 128k frame relay circuit for internet access and we are having problems with connection speed. The provider says either we are maxed out on bandwidth or we have a network problem. I want to be sure my end is ok before upgrading the circuit. How can I troubleshoot the speed and bandwidth of my network? I have downloaded some demo programs for analyzing networks, but I really don't know how to interpret the results. Any help would be appreciated. Thanks

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Network Bandwidth?

by royonoonone In reply to Network Bandwidth?

do a file transfer from station to station
of 5megs this will give an idea...
3 minutus or better ...this is good speed

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Network Bandwidth?

by jlbecker67 In reply to Network Bandwidth?

The question was auto-closed by TechRepublic

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Network Bandwidth?

by OddballSixActual In reply to Network Bandwidth?

In order to make sure that it is not your end of the network, you will need to look for several problems that can cause network slowness. Because of the wide range of problems to check for, there are several approaches you can use to test your end of the network.

First, check for collision domain problems. If your network hub has a collision indicator, monitor it for a while. Next, get a packet scanner. You can usually download a demo from the net for free. If you get unusually high volumes of broadcasts, you may want to look at cutting those down.

If that still checks out ok, do a peer to peer crossload of 5-15MB of data. Run it multiple times and record the speeds/times that it takes to perform the operations.

If you still are unsure of whether it is your side or not, seek a local CCNA or CCDA certified guru to help you. Though that is certainly a more expensive approach, best saved for the last ditch.

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Network Bandwidth?

by OddballSixActual In reply to Network Bandwidth?

Email me at wfrazee@hotmail.com if you need more information on how to do some of these basic network analysis tests.

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Network Bandwidth?

by jlbecker67 In reply to Network Bandwidth?

The question was auto-closed by TechRepublic

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Network Bandwidth?

by ckilday In reply to Network Bandwidth?

Check your router for reliability, load, and error statistics. Check your modem or CSU/DSU for errors. Look at the configurations of the modems at both ends to insure that there are no clocking problems. Mismatched clock settings can cause loss of synchronization meaning dropped data and slow response because the modems are always re-synching with each other. You will probably have to work over the phone with a tech from your ISP or circuit provider. Contact your frame-relay circuit provider and ask for a report on circuit utilization. They can provide this for you. That will tell you whether your problem is bandwidth or an internal network problem. Something else to be aware of...frame-relay has a CIR or committed information rateand a burst rate. The CIR is the minimum bandwidth you will have available regardless of the load on the circuit. The burst rate is the maximum bandwidth you can transmit at even if there's no other traffic on the line. You may spend most of yourtime transmitting at your burst rate, but once the load from other customers increases, any traffic over your CIR is discarded! Check your contract. You may think you have 128Kbps when in fact you're guaranteed only 64K or even 32K.

I hope thishelps. Best wishes,
- ck

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Network Bandwidth?

by jlbecker67 In reply to Network Bandwidth?

The question was auto-closed by TechRepublic

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Network Bandwidth?

by -Q-240248 In reply to Network Bandwidth?

Answer one will not work, nor will answer two. THis checks local traffic only. ckildays answer is the best. Your provider WILL provide you with circuit utilization and if it's topping out at 100% a lot, you need more bandwidth. Also check the CIR astold by ckilday.

Another way to find out what's going on is to check the router stats as to the traffic going out, dropped packets and other errors. If you don't have a lot of employees, then find out who's hogging the bandwidth and put out some access lists to ban certain worthless internet sites. It all depends how many people u have. If not alot then you is always the possibility of being attacked.

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Network Bandwidth?

by jlbecker67 In reply to Network Bandwidth?

The question was auto-closed by TechRepublic

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Network Bandwidth?

by estebandelatorre In reply to Network Bandwidth?

You have a 128, but with what cir? usually 50% or 75%, work with any of these values.
1.- Work with a sniffer or packet capture in order to verify if all traffic between nodes are the one that you are hoping...
Most problems are statics routes or default gateway problems in users Pc's.
2.- To measure the bw, unfortunatelly, the only way is:
a.- ASk your provider to give you a chart of bw consuming in peak hours.
b.- In peak hours, disconnect everyone off the line, connect your machine onlyand perform a file transfer with a 10MB file. (5 to 8 minutes are good to accesptable performance.
Try to document this test with a sniffer and show it to your provider.
3.- If you have a windows 2000, you will have a new utility, pathping.exe. Itwill help you to do a first approach to any network/server problem. Document it's statics while copying the file.

Good Luck

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