Forum Discussion

tatmotiv's avatar
tatmotiv
Icon for Cirrostratus rankCirrostratus
Jan 13, 2016

load balance ICMP echo requests to pool members

Hi there, I'm trying to setup a virtual server which will forward ICMP to pool members and let them handle answering ICMP instead of letting the BigIP handle ICMP itself. My plan was to: disab...
application delivery
LTM
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Jan 13, 2016

Hi Tatmotiv,

 

this feature looks somewhat broken to me...

 

  1. ICMP=enable and ARP=enable will cause LTM to respond

     

  2. Switching to ICMP=disable and ARP=enable will cause ICMP messages to become dropped.

     

  3. Switching to ICMP=disable and ARP=disable will cause the servers respond to ICMP messages, until the ARP caches are timed out (with static MAC entries it would continue to work)

     

  4. Switching to ICMP=disable and ARP=enable will cause half of the ICMP messages to become dropped and the other half is still responded by the servers.

     

  5. Switching to ICMP=enable and ARP=enable will cause LTM to respond half of the ICMP messages and the other half is responded by the servers.

     

  6. Clearing the Connection-Table while having ICMP=enable and ARP=enable will immediatly cause LTM to respond to everything.

     

  7. Going back to the state of 4.) and then clearing the Connection-Table will cause the ICMP messages to become dropped.

     

  8. Going back to the state of 3.) and then clearing the Connection-Table will cause the servers respond to ICMP messages.

     

I'd recommend to call F5 support and ask for a fix/assitence...

 

FYI: I'm using TMOS v12

 

Cheers, Kai