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Jatinder_383355's avatar
Jatinder_383355
Icon for Nimbostratus rankNimbostratus
Feb 09, 2019

F5 LTM Home Lab Issue

 

I setup this F5 home lab using vmware workstation. Key notes:

 

1) Servers are running Win-7 (iis & hosting local website for testing) 2) All of the F5 LTM interfaces are assigned to appropriate VMNet vlans & are showing up.

 

Issues: 1) F5 is not able to ping the inside servers but inside servers are able to ping the F5 LTM inside ip(10.0.0.105).

 

2) Servers cannot ping each other. For this reason I cannot check if the website hosted on them is working.

 

Please suggest on what changes I need to make in lab to get this working

 

Thanks JS

 

application delivery
LTM
  • nikzin_341815's avatar
    nikzin_341815
    Icon for Nimbostratus rankNimbostratus
    Feb 09, 2019

    Maybe Win7 Firewall is blocking ping requests. If not, start tcpdump on F5 and capture traffic for troubleshoot.

     

  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Feb 09, 2019

    The note that the two windows boxes can't ping each other suggests to me that the fault is at the windows boxes.

     

    You can verify this by performing a tcpdump at the BigIP. If you see ICMP echo-requests leaving the internal interface and no reply, that's a smoking gun.

     

    Check your windows firewalls...

     

    H

     

  • Allwyn_Mascaren's avatar
    Allwyn_Mascaren
    Icon for Cirrus rankCirrus
    Feb 10, 2019

    Man you need to put some more details like 

    tmsh list ltm vlans
tmsh list ltm self-ip
tmsh list ltm virtual

    and try this pcap

    tcpdump -nni 0.0:p host  or host  -w /var/tmp/f5lab.pcap

    Then get the capture from winscp.

    Check the routes on the backend server if they have f5 as the default gateway. If not then you need to enable 

    SNAT: auto
    map in the virtual server option.

    cheers!