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2nd nic in server killing network access upon reboot

Discussion in 'General Discussion' started by SolutionsIT, Jan 1, 2019.

  1. SolutionsIT

    SolutionsIT Member

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    We've got two HP servers;
    Both servers have 3 cables running to them

    eno0 - This cable runs to a 'WAN' switch and has a entire class c network on it
    eno1 - This cable runs between both server
    MGMT - This cable runs to our Windows server's on a separate switch so we can access the iLO


    I've configured eno1 to be an entirely different network from eno0, bring up the nic & ssh backups work between our two servers until there is a reboot once a reboot happens, network access to both servers is gone, I have to use iLO -> Console -> turn off eno1, give it a few minutes and the server comes back up... now this is where it gets odd, I enable eno1 and each server cannot ping eachother

    I leave eno1 off, reboot the server allow the server to come back online then enable eno1 and the server's can ping across without any issues.

    Sadly this one is above my head and every spot I find online for some advise doesn't lead to a solution, so I'm now hoping to find some advise here in regards to this.
     
  2. dalem

    dalem Well-Known Member PartnerNOC

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    Not sure how your network is configured ( I am making an assumption that your iLO runs on a private network? If I am wrong please correct.
    Your routing tables are probably conflicting & the private is taking preference as it might be coming up first .

    Try the most minimal config that will work for your Private Lan

    to something like

    DEVICE=eno1
    NAME=eno1
    TYPE=Ethernet
    BOOTPROTO=static
    IPADDR=192.168.1.5
    ONBOOT=yes
     
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  3. SolutionsIT

    SolutionsIT Member

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    Thanks for taking the time to respond... but I think I figured it out (and if this is it I really.... really need some holidays haha')

    DEFROUTE=yes

    That was configured on eno2, iirc that flags that interface as the default route for all ipv4 traffic and would probably break everything.
     
  4. rpvw

    rpvw Well-Known Member

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    From the sys admin dictionary:
     
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    cPanelLauren and SolutionsIT like this.
  5. SolutionsIT

    SolutionsIT Member

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    Thanks, I needed that ;D man did I laugh way to hard on that one haha'
     
  6. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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    Hi @SolutionsIT

    Glad to see you were able to resolve the issue! Thanks for updating us and thanks to everyone for helping out!
     
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