What about the device drivers for the ethernet card and/or the OS version. Have 
you checked the drivers are the latest and greatest and looked on any forums 
for any bugs for those particular devices and driver versions. What OS is your 
backup server running? Is that fully patched?
Any dropped packets?
Sorry to state the things that you will probably have checked already.
 
Regards
Andy
 

> Date: Tue, 11 Dec 2012 18:21:37 +0000
> From: dave.werth AT GARMIN DOT COM
> Subject: Re: [Networker] High speed Ethernet problem
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> 
> Our backup server handles everything. The tape drives that we backup to (no 
> backup to disk yet) are attached and all data comes in to the server and is 
> written to the tapes.
> 
> I doubt the keep alive settings come in to play. We backup through the 1 GB 
> built in NIC without a problem. Only when we switch to the 10 GB NIC do the 
> problems occur.
> 
> I'm thinking the switch is not the problem because we had the same issue a 
> year ago when we tried an optical 10 GB NIC. This new NIC is an electrical 
> connection so they were going to two different switch ports. I spent about 4 
> months trying to get the optical NIC working trying all sorts of fixed 
> without success. So with the same problem occurring with both the optical and 
> electrical NIC it appears the problem must be in the OS or NetWorker.
> 
> Dave Werth
> Garmin AT, Inc.
> Salem, Oregon
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] 
> On Behalf Of Andy Fahy
> Sent: Tuesday, December 11, 2012 2:39 AM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: [Networker] High speed Ethernet problem
> 
> Hi Dave,
> 
> Could you tell us a little more about the usage of the networker server?
> Is it used to only receive metadata and do scheduling or do you have tape 
> drives/disk drives attached. What is the throughput of data through the NIC 
> on the backup server?
> What speed is the ethernet adapter set to. Is it locked to full duplex or 
> auto negotiate? This may not affect you, but with older 100Mb networks this 
> was a factor.
> Similar question for the switch port it is connected to. What speed setting 
> is defined?
> Have you tried the bigasm directive to push a large file through this 
> connection proving it is directly related to the speed of this new 10Gb link?
> I assume you have applied the TCP keep alive settings to maintain your long 
> running sessions. By your description though that would not be your specific 
> problem
> Regards 
> Andy
> 
> 
> 
> > Date: Fri, 7 Dec 2012 18:31:55 +0000
> > From: dave.werth AT GARMIN DOT COM
> > Subject: [Networker] High speed Ethernet problem
> > To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> > 
> > Folks,
> > 
> > We are running NetWorker 7.6.1.5 on Windows 2008 R2 Standard. We recently 
> > added a 10 GB Ethernet adaptor (replacing the built in 1 GB adaptor). Now 
> > the larger longer NetWorker backups hang up and never complete. If I go to 
> > the client that in hung I can kill the "save" process and it will restart 
> > and may finish but not always. A couple of years ago we tried the same 
> > thing with an optical 10 GB adaptor and the same thing happened and we 
> > eventually gave up. The way it happens it appears that there is a problem 
> > with the handshaking going on with the network sessions. Have any of you 
> > ever run into this problem? Does anyone have any advice?
> > 
> > Thanks, Dave
> > 
> > Dave Werth
> > Garmin AT, Inc.
> > Salem, Oregon
> > 
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