Packet drops on destination NIC

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Packet drops on destination NIC

Veeam Logoby RyGy7 » Fri Jul 24, 2015 3:41 pm

So I have setup several desktops to use veeam endpoint and its been working great so far. But i've recently encountered a problem at about the same time each day. The backup destination is simply an old win7 computer with tons of storage. Here is what i see;

veeam client logs errors in the win event of 'network not found'

the destination veeam storage drops packets just pinging the client & the network utilization bounces up n down 15% - 40%

after a few re-tries and an hour all is good again. This is happening to about 5 clients that are running at that time. Now of course i could stagger better but I was wondering if anyone has tips to help the bandwidth on the destination PC.


Thoughts?
RyGy7
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Re: Packet drops on destination NIC

Veeam Logoby PTide » Fri Jul 24, 2015 4:02 pm

Hi,

Have you checked the resource monitor network tab on the destination machine?

Thank you.
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Re: Packet drops on destination NIC

Veeam Logoby Dima P. » Fri Jul 24, 2015 4:08 pm

RyGy7,
The backup destination is simply an old win7 computer

To clarify, are you using it as a VBR repository or a regular shared folder? What backup mode was configured in the endpoint? Thanks
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Re: Packet drops on destination NIC

Veeam Logoby RyGy7 » Fri Jul 24, 2015 4:29 pm

Regular shared folder. and the network utilization i was referring to was on the destination, sorry for the confusion.
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Re: Packet drops on destination NIC

Veeam Logoby Vitaliy S. » Mon Jul 27, 2015 10:06 am

Shawn, have you tried to check Windows Event log for this Win 7 server? Also have you tried to reduce the number of concurrently launched backup jobs? It seems like that target storage NIC card is overloaded when all jobs are running at the same time.
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Re: Packet drops on destination NIC

Veeam Logoby RyGy7 » Tue Jul 28, 2015 2:49 pm

Unfortunately the event logs show nothing. I would have assumed so as well, but nothing in application / system / HW events / or windows network profile. I have 5 machines backing up to this which I will begin to stagger (hope i don't bang up against other machine times..lol)

What makes this just slightly odd to me is that it was not an issue until I altered the IP address on the server. Since then i have rebooted and flushed DNS. Also the backups eventually succeed so it is a flooding issue, just didn't think 5 machines was too much. I disabled tcp offloading last week but clearly didn't help.

thanks
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Re: Packet drops on destination NIC

Veeam Logoby Vitaliy S. » Tue Jul 28, 2015 8:46 pm

Do you have Veeam B&R in your infrastructure?
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Re: Packet drops on destination NIC

Veeam Logoby RyGy7 » Wed Jul 29, 2015 4:11 pm

No, just a shared folder. At this point I am going with faulty NIC and replacing with two PCI cards. I'll reply back if I resolve with this.
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Re: Packet drops on destination NIC

Veeam Logoby Vitaliy S. » Wed Jul 29, 2015 5:49 pm

Ok, keep us updated on your upgrade results.
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Re: Packet drops on destination NIC

Veeam Logoby RyGy7 » Thu Jul 30, 2015 3:09 pm 1 person likes this post

Issue resolved!! Another Admin expanded our dhcp scope last week. Which then extended into the IP address of my backup destination. I had concerns that duplicate IP's were an issue but I was unable to prove it in the times i brought down the box. Turned out to be a Samsung phone...woopsie!

Set a new IP and all seems fine.
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Re: Packet drops on destination NIC

Veeam Logoby Vitaliy S. » Thu Jul 30, 2015 3:28 pm

Nice catch, good to know that you're up and running now.
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