rsync is effecting in the DC switch??

[Benjamin Schweizer]

Hi Manuel,

at least, this is not a common problem. I'd use tcpdump to see what is
really happening on your network card; if possible also run tcpdump on
the receiving machines. This tells you exactly what traffic is on the
network. If there are any unrequested broadcasts, check the ethernet
address (mac address) of the packets. You should only receive valid
broadcasts and traffic that is directed to your server.
If you receive unicast traffic that is directed to other hosts than
yours, it is a switching problem. I'd suggest rebooting the switch and
if possible, upgrading the firmware to the latest release. I expect that
you have already rebooted the centos box?


Greetings

On Tue, Sep 23, 2008 at 12:00:47AM -0300, Manuel Kissoyan wrote:
> Thanx Ben,
> 
> But i have really no idea why this is happening, the backup server 
> crashed and the DC rebuild it with centos 5 (i guess had centos4 
> before), after the rebuild did start this problem, could be something 
> with the os version or distro?
> 
> not sure where to start, the problem is not broadcasting...i mean, the 
> dc tech told me the following, so the broadcasting is not something that 
> "normal"....
> 
> "is broadcasting to all servers connected to that switch right now. It 
> is not normal for it to be abusing the network and flooding other 
> servers with unwanted traffic."
> 
> so any help or idea will be aprecciated.
> 
> 
> btw, here is the command that i was running in the backup server to pull 
> the data from the other servers, not sure if it could have any 
> problem...but i was running the same command without problem before the 
> backup server rebuild.
> 
> /usr/bin/rsync -rplogDtzH --stats --delete-during --timeout=500 
> --exclude-from=/root/rsyncexcludedfiles 
> --files-from=/root/rsyncincludedfiles -e ssh root at xx.xx.xx.xx:/ 
> /backup4/server8
> 
> 
> Thanx in advance!
> 
> Manuel
> 
> 
> 
> 
> 
> 
> 
> 
> Benjamin Schweizer wrote:
> >Hi Manuel,
> >
> >it is unlikely that rsync is causing your trouble as it operates on top
> >of tcp (osi layer 4); broadcasts are special ethernet packets that are
> >transmitted on osi layer 2. I think there might be another problem with
> >your server or with your switch (is it hubbing?). I suggest you talk to
> >your network admin again or repost this mail into a network list.
> >
> >
> >Greetings
> >Benjamin
> >
> >On Sun, Sep 21, 2008 at 10:16:25PM -0300, Manuel Kissoyan wrote:
> >  
> >>hi guys, we are using rsycn without problem but today after some 
> >>problems in one of the servers, the dc tech did find the rsync is 
> >>effecting in the switch where they have the server connected 
> >>broadcasting all the ports in the switch at the dc?????
> >>
> >>This is what the dc tech said:
> >>
> >>"It appears that your server is broadcasting to every port on the switch 
> >>that you are connected to"
> >>
> >>Any idea why this is happening?
> >>
> >>Thanx in advance!
> >>
> >>im using version 3.0.3  protocol version 30
> >>
> >>and im running the command through shell in the destination server 
> >>(backup server) to pull the files from the other servers:
> >>
> >>/usr/bin/rsync -rplogDtzH --stats --delete-during --timeout=500 
> >>--exclude-from=/rsyncexcludedfiles --files-from=/rsyncincludedfiles -e 
> >>ssh root at xx.xx.xx.xx:/ /backup/server
> >>
> >>Manuel
> >>
> >>
> >>
> >>-- 
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> >
> >  

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