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Webcast-Catalyst9k
New Member

Large time taken for file copying

Hi,

Our office lan network is in 192.168.0.0/16  with 300 nodes and 30 server .Since its a large broadcast domain some times it takes large time for copying files.How can we avoid this problem with out changing the subnet.Also how to avoid broadcast storm.

we are using cisco 2950 series switch.

pls give me a better solution.....

Thanks

Sihanu.N

10 REPLIES

Re: Large time taken for file copying

Hi Sihanu,

Hmm /16 as single broadcast domain...strange. You need to break down it to /24 as soon as possible for better performance.

However you can configure strom control like bwlo.

Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# storm-control broadcast level 20

Also can take look at the below two links for better understand.
http://www.techrepublic.com/article/manage-network-broadcasts-on-cisco-switches-using-storm-control/6169808
http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_22ea/SCG/swtrafc.html#wp1063295


Please rate the helpfull posts.
Regards,
Naidu.

Super Bronze

Re: Large time taken for file copying

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.

Posting

The fact you have a large subnet (the /16), but with 330 hosts, does not necessarily mean your file copying performance is due to broadcast activity.  For example, really poor file copy performance might be due to a duplex errors.  Or, also for example, you might have all your 2950s in one long daisy chain topology.  Some additional analysis is probably merited.

New Member

Large time taken for file copying

Thanks for the reply.Is there any issue if I enable storm control broadcat in all port of the switch.Also what is the best value of storm control broadcast level value???

This is my config

cisco1(config-if-range)#interface range gigabitEthernet 0/1-48

cisco1(config-if-range)#storm-control broadcast level 20

cisco1(config-if-range)#storm-control action shutdown

Thanks

Sihanu N

Super Bronze

Re: Large time taken for file copying

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

Is there any issue if I enable storm control broadcat in all port of the switch.

Also what is the best value of storm control broadcast level value???

Yes, there can be an issue since networks use broadcasts legitimately.  Broadcast storm control shouldn't be considered a tuning option, but an option to preclude total network meltdown.  For latter usage, the network might not work too well when storm control engages, but you might still be able to examine the network (in-band) and mitigate the issue.

Best value varies.  Since broadcasts are legitimate, you might analyze your network to baseline what the broadcast volume is, then add some fudge factor.  Hopefully, this will then only have storm control engage when something is amiss.  Of course, you also then want to continuously monitor your network, as "routine" broadcast volume can change overtime if network usage changes.

Re: Large time taken for file copying

Couple questions...

How large a file was or is it?

How long did it take to copy?

How did you copy this? Xcopy, drag and drop, cut and paste?

What this a copy or move?

What is the connection speeds for all the links to the spot you copied the file to?

Mike

New Member

Large time taken for file copying

Hi,

How large a file was or is it?  1gb

How long did it take to copy? one hour

How did you copy this? Xcopy, drag and drop, cut and paste? copy and past

What this a copy or move? copy

What is the connection speeds for all the links to the spot you copied the file to? full duplex auto 1000Mbps

Thanks.

Sihanu N

Large time taken for file copying

Could you try a Move instead and see if it is quicker? I have found copying can sometimes take forever while a move is far quicker.

What is the operating system? XP, Vista, Apple?

Is the slowness only from certain PC's?

How many switches or routers does it have to pass through for source to destination?

Do you have any type of rate limiting configured?

What type of switch is the PC connected to?

Just trying to narrow things down.

Mike

New Member

Large time taken for file copying

What is the exact model number of the switch?

What OS is the two PCs running?

-Jason

New Member

Large time taken for file copying

cisco 2950G 48 port

windows server 2005

windiws xp

Sihanu N

New Member

Large time taken for file copying

Are the windows XP and Windows 2003 server both connected to the same switch?  If not could you perhaps attach a diagram showing those two machines and the devices between them?

Also, on each switchport perhaps do a "show interface ", eg if the PC is connected to gigabit port 1, use show interface gi0/1, and look for any errors at the end of the output.  If there are errors, reset the port statistics, retry the copy and examine the errors again.

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