[j-nsp] strange packet loss without impact

Christian cdebalorre at neotelecoms.com
Mon Jul 4 10:57:08 EDT 2011


If in doubt run show system processes summary to check for busy process 
during your peak time.
Also you can have some interesting stats with a show pfe statistics traffic

Christian


Le 04/07/2011 15:33, Matthias Brumm a écrit :
> Hello!
>
> At the moment I am monitoring it with top on UNIX shell, do you have 
> another suggestion? In top this process is idleing.
>
> Regards,
>
> Matthias
>
> 2011/7/4 Christian <cdebalorre at neotelecoms.com 
> <mailto:cdebalorre at neotelecoms.com>>
>
>     Hi,
>     Try to monitor the fwdd process - when running high it causes
>     packet to drop on these pc's.
>
>     Christian
>
>
>     Le 04/07/2011 13:11, Adam Leff a écrit :
>
>         I realize this will sound silly, but have you checked for
>         half-duplex
>         on your interfaces?
>
>         Those onboard J6350 interfaces are actually 10/100/1000, so if you
>         don't have the speed and link-mode hardcoded,  do a show
>         interfaces
>         extensive ge-0/0/# and check the link partner section to
>         ensure you're
>         running full-duplex.
>
>         Adam
>
>         On Jul 4, 2011, at 7:01, Matthias Brumm<matthias at brumm.net
>         <mailto:matthias at brumm.net>>  wrote:
>
>             Hello!
>
>             Since some weeks now, we have a strange packet loss on one
>             of our edge
>             locations.
>
>             A few days ago an IX informed us about packet loss on our
>             router. The router
>             in place is a J6350. We have a 1 Gig line to us and two 1
>             Gig lines to some
>             uplinks. Every communication goes through a 1 Gig copper
>             link to a ProCurve
>             2810-24G. So the external links are connected to the
>             switch and the switch
>             via one cable with the router.
>
>             The packet loss is strange, because:
>
>             1. In smokeping during the busy hours of the day, there
>             are losses of about
>             5%
>             2. From my workstation I get packet loss of about 10 up to 50%
>             3. There are no errors on the switch or router interface
>             (except i.e. VLAN
>             errors)
>             4. no customers have reported any problems. But there are
>             many customers
>             relying on real time communication (VoIP/RDP)
>             5. The switch port with the router is showing maximum 200 Mbit
>             6. The router is showing 20% real-time threads
>
>             According to the datasheet the J-Series should be able to
>             deliver this
>             performance easily. Or are the onboard Gig-Interfaces the
>             problem? Of course
>             I know, that this physical configuration is a bad idea,
>             and I will change is
>             very soon to ease the load on this particular port.
>
>             Any other ideas?
>
>             Regards,
>
>             Matthias
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