Something is taking all my bandwidth!! SBS 2003

May 11, 2012 at 11:14:45
Specs: Windows 2003 Server
I administer to a Small business Server 2003 domain and noticed that all my bandwidth was being used pretty much 100% of the time.

After some troubleshooting I have narrowed it down to something the domain controller is doing. I can not for the life of me figure out what process or task is eating up all the bandwidth.

The server is currenly used for AD, Exchange, Symnatec End Point administration, and GFI Mail Essentails spam control.

I have been using a variety of tools: mrtg, perfmon, etc and brute force to try and isolate the problem.

ANY HELP IS APPRECIATED!

S Smith


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#1
May 11, 2012 at 12:41:16
"noticed that all my bandwidth was being used pretty much 100% of the time."

internet bandwidth?
lan bandwidth?
how are you determining the 100% usage?

post one of the mrtg graphs?

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#2
May 14, 2012 at 04:42:14
I am referring to my internet bandwidth. We were experiencing lots of drop internet calls and intermitent internet surfing. The internal network is clean and working at normal speeds and connectivity. The gateway was is problem. In talking with my ISP I was notified that we were using all of our available bandwidth. 5 MB pipe I beleive he said. And also uploading at a higher rate than he usually sees. Working with him we realized it was the DC that was taking all available bandwidth.

The clients have no torrents programs, are virus clean and with the exception of maybe some streaming radio are not heavy internet users.

Thoughts?

I have a first run of MRTG and the graph really shows nothing. I am researching the proper configuration as I type this. The default first run did not show me very much.


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#3
May 14, 2012 at 10:44:18
SBS usage of the internet bandwidth would have a direct impact on the lan and server access. If its busy talking to the internet the entire lan would be slow.

yet you state the lan is fine and no issues with SBS access. Just voip and internet drops.

start by posting the results of a broadband test from the server and a workstation with both going to the same test server.

Post the results of a ipconfig /all from the server for review

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Related Solutions

#4
May 14, 2012 at 11:48:12
I am not sure what you mean by a broadband test?


Windows IP Configuration
Host Name . . . . . . . . . . . . : nanb01
Primary Dns Suffix . . . . . . . : NANB.local
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : NANB.local

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network Connection
Physical Address. . . . . . . . . : 00-0F-1F-F9-BC-AA
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.16.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.16.1
DNS Servers . . . . . . . . . . . : 192.168.16.2


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#5
May 14, 2012 at 13:11:35
google broadband speed test [your city] for more info.

workstations set to 192.168.16.2 for dns?

Does your router have traffic monitoring ?

post the results of a netstat -e from the server

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#6
May 15, 2012 at 07:22:12
192.168.16.2 is my DC / DNS server.
The router is being replaced. It does not have traffic monitoring. I can look at the active sessions.

One sec on the netstat front.


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#7
May 15, 2012 at 08:15:16
Netstat -e

Interface Statistics

Received Sent

Bytes 1563545889 4172697881
Unicast packets 8834332 9800931
Non-unicast packets 43958 1263
Discards 0 0
Errors 0 0
Unknown protocols 28752


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#8
May 15, 2012 at 09:55:57
migh want to follow this article to identify the unknown protocols

http://www.ehow.com/how_7898698_ide...

Speed test results?

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#9
May 15, 2012 at 11:31:35
Speedtest:

Download :: 6.4 Mbps 817 kB/s

Upload :: 292 Kbps 37 kB/s

http://testmy.net/
---------

Rogers.com speedtest:

Download :: 5.01 Mbps
Upload ::494 Kbps


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#10
May 15, 2012 at 13:27:48
what I need you to do is go to the same broadband test site and select the same server. Run a test from a workstation and run a test from the server.

We need the test point to be the same so we have a constant in the comparsion of their stats.

What bandwidth are you paying for?

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#11
May 21, 2012 at 11:23:23
Guess I lost you. Doesn't appear the SBS is taking the bandwidth. Something else is going on.

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