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Author Topic: Large file copy  (Read 2651 times)

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Offline eby83

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Large file copy
« on: June 03, 2013, 08:27:45 AM »
Hi, we have recently noticed an issue with copying large files (> 2GB) between different VLAN's. Our servers and users are on different VLAN's. Copying a large file within the same VLAN works fine without any issues. While copying from a server to a user machine, the copying process starts but gives an error 'network resource not found'. This happens at random points during the copy process. Please help!

Thanks.


Offline TankII

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Re: Large file copy
« Reply #1 on: June 03, 2013, 02:17:54 PM »
What is your qos setting on the switch?  2 and regular?  Try changing it to 8 and regular if running VOIP or putting it to 1 and large if not.

TankII

Offline eby83

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Re: Large file copy
« Reply #2 on: June 04, 2013, 12:53:28 AM »
Qos on the switch is currently set to 2. Is there a document on the recommended qos setting? You have suggested two settings for qos and each time a change is done the stack has to be restarted which is not ideal. Is there a way of deciding which is the correct setting?

Thanks.

Offline TankII

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Re: Large file copy
« Reply #3 on: June 04, 2013, 06:50:50 AM »
As I noted, if you are not running VOIP traffic across this switch, change it to 1 and large.  That 's the recommended iSCSI setting per the best practicies guide.
That meanse queue 1 (default for un-marked traffic) and large for maximum buffering for queue 1.

TankII

Offline eby83

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Re: Large file copy
« Reply #4 on: June 04, 2013, 06:59:18 AM »
We are running VOIP on this switch. In that case should the setting be 8 and regular?

Offline Michael McNamara

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Re: Large file copy
« Reply #5 on: June 04, 2013, 09:22:35 AM »
You really haven't provided a whole lot of detail so I'm not sure what you expect to get back in return.

https://forums.networkinfrastructure.info/announcements/read-before-posting/

What model of switch?
What version?
Who's acting as the router between VLANs?
What's the topology look like?
You mention IP phones? Is the PC doing the copy connected to the IP phone?
What is the link speed of the 2 devices in question?

You are in essence asking "why is my car running hot?" without any context or background. It might help if you let us know that you live in Texas and just made a 100mile trip to Dallas towing a 20' boat.

We have no idea of your topology, how it's configured or how busy it's running.

If you want more than just a quick shot from the hip you'll need to provide detailed information.

The fact that you don't have this problem when copying data between devices in the same VLAN is the only fact that you provided. That would suggest - barring any other information - that you need to look at the router.

Good Luck!
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Offline eby83

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Re: Large file copy
« Reply #6 on: June 04, 2013, 09:28:45 AM »
Thanks Michael.

Our core stack is Avaya 5520 and 5510. The edge stack is 4550 switches. The core switches are running on 6.2.4 and edge 5.6.1. The gateway of client machines connected to the edge stack is the edge stack itself. We have tried copying from machines connected to IP phones as well not connected to them, the result is the same. The servers are in vlan 1 and client machines in vlan 2. Within the same vlan there is no problems with copying files. The issue is only while copying between the vlan's. Hope this gives a 'clearer' picture of the network.

Thanks again!