Forum Discussion
girishb
Cirrus
CirrusTCPDUMP capture for Performance Virtual Server
Hi Team, We are having issue with VIP which is configured with Performance(Layer 4) Virtual Server. Issue: Application hosted on back-end server is not accessible through VIP. but when we di...
girishbCirrus
CirrusThanks Dario...
I tried with enabling the Automap
on VIP. But it did not work. .
Also captured the tcpdump.. We
found that destination server(backend server) is trying to send multiple
re-transmission SYN-ACK packets as its not receiving ACK packet for SYN-ACK
packets and finally session ending with RST packet from backend server..
We suspect that reverse route
from F5 LTM to back source (client) is having issue. We are checking with
firewall team and also network team to check path
If auto-map is not working, this could be because you are filtering the source IP in one of your firewalls.
Also, take into account that if your SYN-ACK is not reaching your client this could be because your response is sending to the client using a different path (asymmetric traffic) which could be filtering by spoofing in your firewall.
The better way to troubleshoot this is to use tcpdump in any other devices trying to figure out the current path.
BTW, if my last answer was helpful, please remember to set it as "the best" or give me some upvotes.
KR,
Dario.
