Forum Discussion

ari2010_344962's avatar
ari2010_344962
Icon for Nimbostratus rankNimbostratus
Dec 27, 2017

Self Ip Address Internal not recheable from Docker

Hello All,

 

I am using LTM VE BIG-IP 11.6.2. I am new to F5. The topology is simple -

 

BIG IP LTM (1.2)<---->eth0 (Linux) <192.168.122.4> <192.168.122.10>

 

I have configured self IP address Internal with 192.168.122.4. But I am unable to ping each other. Could you shed some light what could be the issue or anything other info you would require from my setup.

 

application delivery
BIG-IP
devops
LTM
  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Dec 28, 2017

    Sorry, you might need to be a bit clearer in your description...

     

    Do you mean you have the same subnet on eth0 (Mgmt interface) and a VS? (Which is invalid). Or is that eth0 a different server? Where does 192.168.122.10 come into it?

     

    Or is that just text that you forgot to wrap preformated around?

     

    Things to check (Assuming it's a badly formatted 'diagram')

     

    • Is the self-ip configured to accept and respond to ping?
    • Do you have multiple interfaces on the same subnet?
    • Are you getting an ARP response from the BigIP back to the Linux box? (arp -an|grep 192.168.122.4)
    • Can you see echo-request leaving the Linux box destined for the correct MAC? (tcpdump)
    • Can you see traffic incoming on interface 1.2 from the Linux box? (Hint. Use tcpdump)
    • If you see traffic inbound, do you see ARP and echo-request? What about echo-reply?
    • What if you tcpdump on ALL interfaces and not just 1.2?