+ Post New Thread
Results 1 to 11 of 11
O/S Deployment Thread, PXE boot with Realtek 8111B/C in Technical; Having got FOG running I was over the moon. Our new batch of 25 Tosh laptops went in about as ...
  1. #1

    Join Date
    Jun 2008
    Location
    Barnet
    Posts
    123
    Thank Post
    33
    Thanked 11 Times in 7 Posts
    Rep Power
    14

    PXE boot with Realtek 8111B/C

    Having got FOG running I was over the moon. Our new batch of 25 Tosh laptops went in about as painlessly as possible. So, let's now turn to the 30-odd new Akhter all-in-ones ....

    I simply cannot get them to PXE boot. They have the same network adaptor as the Toshes, Realtek 8168/8111, but always fail to find a DHCP or DHCPproxy request.

    I tried a etherboot CD, first on one of our NS Optimum PCs (which have the same adaptor) then on an Akhter. The NS Optimum (which was also refusing to PXE boot) worked fine with this CD - but the Akhter won't.

    Oddly, the NS Optimum will now PXE boot happily without the CD. It seems that changing the boot device order from LAN/HDD/CD to CD/LAN/HDD was enough to persuade it to work, so that sounds like a timing issue. We are running spanning tree protocol and that is supposed to cause PXE boot problems.

    But it works fine on the Toshes, and on other, older, machines around the campus. Any ideas? All straws gratefully clutched at.

  2. #2

    SYNACK's Avatar
    Join Date
    Oct 2007
    Posts
    11,247
    Thank Post
    882
    Thanked 2,745 Times in 2,319 Posts
    Blog Entries
    11
    Rep Power
    785
    Do you have STP enabled on the switches, if the power saving settings on the card switch it off during a reboot or when the system if off it will mean that an STP lockdown period will occour on the port and will probably still be locked while it is looking for DHCP to PXE boot. This may not affect the other cards if they are set to maintain an active link state even when the computer is off. You could try setting the cards as always active by enableing Wake on Lan in both the bios and the advanced properties of the NIC drivers which should make it remain active. You could also disable STP while imaging, this may not be the cause but is worth looking in to.

  3. Thanks to SYNACK from:

    birchanger (29th July 2009)

  4. #3

    Join Date
    Sep 2006
    Location
    West Midlands
    Posts
    411
    Thank Post
    73
    Thanked 75 Times in 58 Posts
    Rep Power
    44
    A quick thing to try is to press the <pause> key when the "DHCP /" propeller starts spinning, wait 30 seconds or so and then press <return> to continue the propeller.

    That might be enough for STP to settle down and the network port to go "live".

    mb

  5. 2 Thanks to Martin:

    birchanger (29th July 2009), eejit (2nd September 2009)

  6. #4

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,842
    Thank Post
    110
    Thanked 592 Times in 513 Posts
    Blog Entries
    1
    Rep Power
    226
    Your supposed to tell STP which ports are edge ports!

  7. Thanks to Geoff from:

    birchanger (29th July 2009)

  8. #5

    tmcd35's Avatar
    Join Date
    Jul 2005
    Location
    Norfolk
    Posts
    5,878
    Thank Post
    879
    Thanked 960 Times in 791 Posts
    Blog Entries
    9
    Rep Power
    339
    I've had this on the odd machine before and have found a simple BIOS reset back to factory defaults solved the problem. Don't ask why (I haven't the foggiest) but it seems to do the trick

  9. Thanks to tmcd35 from:

    birchanger (29th July 2009)

  10. #6


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339
    @ Geoff - does setting the core switches with a lower priority achieve this?

  11. #7

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,842
    Thank Post
    110
    Thanked 592 Times in 513 Posts
    Blog Entries
    1
    Rep Power
    226
    Yes your core switches should have lower priority.

  12. Thanks to Geoff from:

    CyberNerd (29th July 2009)

  13. #8

    SYNACK's Avatar
    Join Date
    Oct 2007
    Posts
    11,247
    Thank Post
    882
    Thanked 2,745 Times in 2,319 Posts
    Blog Entries
    11
    Rep Power
    785
    Quote Originally Posted by CyberNerd View Post
    @ Geoff - does setting the core switches with a lower priority achieve this?
    Nope this step does not configure the edge ports, you need to designate the workstation ports as access ports or portfast or whatever the particular terminology is for your brand of switch. The STP priority just effects the master election process to decide which are the best links to keep active between switches where multiple links are avalible. By electing the core as the master STP will try to create the shortest path to that switch with the avalible links. If this gets messed up it can really mess with your network as STP will enable paths that are the shortest to whichever switch is elected which could be a core switch. If this happens then your network traffic can easily bounce from one end of the network to the other before it makes it to its destination.

  14. Thanks to SYNACK from:

    CyberNerd (29th July 2009)

  15. #9

    Join Date
    Jun 2008
    Location
    Barnet
    Posts
    123
    Thank Post
    33
    Thanked 11 Times in 7 Posts
    Rep Power
    14
    Working! Well, almost. I now have a FOG problem but PXE is working. It was STP stopping me. It's interesting that different machnines with the same network adapter should behave in wildly different ways.

  16. #10

    mac_shinobi's Avatar
    Join Date
    Aug 2005
    Posts
    9,937
    Thank Post
    3,468
    Thanked 1,091 Times in 1,006 Posts
    Rep Power
    371
    Quote Originally Posted by birchanger View Post
    Working! Well, almost. I now have a FOG problem but PXE is working. It was STP stopping me. It's interesting that different machnines with the same network adapter should behave in wildly different ways.
    different firmware revision / types on the network cards

  17. #11
    eejit's Avatar
    Join Date
    Jun 2005
    Location
    Ireland
    Posts
    606
    Thank Post
    52
    Thanked 12 Times in 12 Posts
    Rep Power
    23
    Quote Originally Posted by Martin View Post
    A quick thing to try is to press the <pause> key when the "DHCP /" propeller starts spinning, wait 30 seconds or so and then press <return> to continue the propeller.

    That might be enough for STP to settle down and the network port to go "live".

    mb
    You have absolutely saved my life

    PHEW! - shows how invaluable this forum is. Thanks everyone.



SHARE:
+ Post New Thread

Similar Threads

  1. Another PXE Boot Question
    By Reaper in forum Wireless Networks
    Replies: 7
    Last Post: 31st October 2008, 03:27 PM
  2. vmware server pxe boot
    By plexer in forum How do you do....it?
    Replies: 2
    Last Post: 25th April 2008, 02:20 PM
  3. Abit IP-95 Mobo with Realtek Boot Agent
    By comedydave in forum Hardware
    Replies: 0
    Last Post: 13th March 2008, 01:21 PM
  4. Problems getting old RM PC's to PXE boot
    By Kyle in forum Windows
    Replies: 7
    Last Post: 21st November 2007, 01:14 PM
  5. PXE Boot
    By richard in forum Wireless Networks
    Replies: 12
    Last Post: 20th May 2006, 05:37 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •