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Eng_Ahmad_38063's avatar
Eng_Ahmad_38063
Icon for Nimbostratus rankNimbostratus

Hi

 

I have same issue

 

my trapshooting is like this : 1. connect 2 LTM to L2 switch (LTM can not see LTM 2) 2. when I connect LTM1 to LTM2 back to back ping is working also I check duplex and speed is same in switch and F5

 

also when I check arp in switch no result

 

Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Jan 07, 2019

You need to determine where the problem is. Methodically. By knowing what needs to flow, and proving what you can see and what you can't see that you would expect to.

 

What do you see when you tcpdump (On interface 0.0 i.e. ALL interfaces) at both ends at the same time.

 

If you ping from LTM1 to LTM2...

 

  • Can you see traffic leaving (icmp-echo-request) LTM with the correct headers (Including VLAN)
  • Can you see traffic (icmp-echo-request) ARRIVING at LTM2?
  • Can you see the RESPONSE (icmp-echo-response) LEAVING LTM2?
  • Can you see the RESPONSE (icmp-echo-response) arriving at LTM1 on the SAME interface that the echo-request was sent on?