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RyanStevenson
9 Posts
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25990
August 18th, 2006 13:00
Slow Network Performance
I have 6 Dell PowerConnect Switches that are connected to a Cisco 3750G Layer 3 gige switch. The performance on the Dell switches when dumping ghost images and large file copies is slow. We are dropping ghost images using a tcpip mapped drive boot cd. The server that holds the images in connected Gigabit to the Cisco and so are the Dell PowerConnect switches. We are also using Cisco IP Phones on the network. We do not have the phones connected to the Dell PowerConnect Switches.
Any ideas?
Thanks
Ryan
RyanStevenson
9 Posts
954
0
Posted August 18th, 2006 17:00
Product Name PowerConnect 2716Firmware Version 1.0.1.07
Boot Version 1008
RyanStevenson
9 Posts
954
0
Posted August 18th, 2006 17:00
Sorry for not including that. I am using the PowerConnect 2716.DELL-Cuong N.
1017 Posts
953
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Posted August 18th, 2006 17:00
Which switch model are you using? Can you fully describe your network topology?
Cuong.
RyanStevenson
9 Posts
954
0
Posted August 18th, 2006 17:00
Product Name PowerConnect 2716Firmware Version
document.write(fwVer); 1.0.1.07 Boot Versiondocument.write(bootVer); 1008RyanStevenson
9 Posts
954
0
Posted August 18th, 2006 17:00
Product Name PowerConnect 2716Firmware Version
document.write(fwVer); 1.0.1.07 Boot Versiondocument.write(bootVer); 1008DELL-Cuong N.
1017 Posts
954
0
Posted August 18th, 2006 18:00
Are you running the switch in managed or unmanaged mode? Also check to make sure you don't accidentally have duplex mismatch problem which could cause this symptom. Duplex mismatch may occur if one side of a link is set to auto-negotiation and the other side is set to fix speed/duplex. Both side must be auto or both side must be same speed/duplex.Cuong.RyanStevenson
9 Posts
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Posted August 18th, 2006 19:00
Both sides are Auto. I have all in managed mode. I turned off QoS on the Cisco and CoS on the Dell side and that seemed to fix the issue, but it seems to of come back.DELL-Cuong N.
1017 Posts
954
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Posted August 18th, 2006 19:00
That's strange. Do you have any configured on the 27xx or is it running only default configuration? What does the network look like? Do you have flow control enabled or disabled? Are you using jumbo frame?
Cuong.
RyanStevenson
9 Posts
221
0
Posted August 22nd, 2006 02:00
I have tried flow control on. I was running the default. I turned off COS. That helped for a little while. If I turned the 27xx into unmanaged are any of the COS, or other features on or are they turned off?
DELL-Cuong N.
1017 Posts
954
0
Posted August 18th, 2006 17:00
Are you running the latest FW? There was a known bug in 27xx that cause performance problem when a packet gets close to max MTU size. Latest FW fixed this.
Cuong.