>>> On 3/20/2012 at 11:10 AM, "Herczeg, Zoltan" <zol...@krasdalefoods.com> wrote: > Well I finally was able to schedule a power on reset changing chparm=00 to > chparm=C0 on the hipersockets iocp definition. I then added mtu=57344 to > ifcfg-hsi0, did an ifdown and ifup for hsi0. I then changed vse's tcpip > definition to mtu=57344. I conducted another test and the time it took to > perform a back up to a virtual tape almost doubled from when it was set to > 8192. > I ran a utility available on vse tcpip called discover and it reported > back > that the best MTU that was successful to get to the linux vm is 1501. > Ifconfig and tcpip on vse shows an mtu of 57344 for the hipersockets link. > Any suggestions on what to look at?
Sounds like routing is sending the traffic outside the box and back in, and not going over the Hipersockets. Try the tracepath command from the Linux side and see what it says. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
