Does tcpdump or Wireshark yield any clues as to what happens before and while things get stuck? - Shao
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thomas Mieslinger Sent: Friday, November 29, 2013 10:20 To: [email protected] Subject: [ipxe-devel] unstable http downloads Hi, I have VMware VMs running on E5-2650 iron, 10g connected. The VM I want to install has an emulated e1000 chip which fist runs the stock vmware PXE ROM, then pxelinux 4.03 and then finally ipxe.lkrn. The http Server is a centos 6.4 with apache httpd-2.2.15-29 serving files. Downloads initiated by ipxe a very unstable. Often the vmlinuz or initrd.img file downloads stuck at 43% or so. The http servers tcp tuning values (tcp_wmem et al.) are centos stock configuration. How can I debug http downloading? Are there any recommendations like "use cubic congestion control on server side"? Should I try to increase the compiled in tcp receive buffer? Thanks for your insight. Thomas _______________________________________________ ipxe-devel mailing list [email protected] https://lists.ipxe.org/mailman/listinfo.cgi/ipxe-devel _______________________________________________ ipxe-devel mailing list [email protected] https://lists.ipxe.org/mailman/listinfo.cgi/ipxe-devel
