Forum Discussion

Cirrus

Aug 10, 2021

F5 Default Route

Hi All, Hope you all are doing great. I have requirement where my old IP range (SUBNET) is fully exhausted. Now we got new range of ip (Subnet). So can we configure two subnet (one ...

Nacreous

Aug 11, 2021

Hi RAQS,

No, if Auto Last Hop is still enable on you F5 BIG-IP.

K13876: Overview of the Auto Last Hop setting (11.x - 16.x)

Auto Last Hop is a setting that allows the BIG-IP system to track the source MAC address of incoming connections and return traffic from pools to the source MAC address, regardless of the routing table.

Regards

RAQS
Cirrus
Aug 11, 2021
Hi Lidev,

Thanks for replying. Can you please elaborate your answer "No". Like for it means we can configure two default routes ?

Regards,
Raqs
- Lidev
  Nacreous
  Aug 11, 2021
  No need, please read K article and you see that Auto Last Hop feature allows packets to be routed without interrogating routing table.
  If this answer was helpful, please don't forget to mark the answer as "Select as Best" in order to pass your post as resolved and help other people to find it 😉
- RAQS
  Cirrus
  Aug 11, 2021
  As of now i am not seeing any traffic on new range VIP. From Network end all routes are in place and rules are in place in firewall. What check or configuration required at F5 end ?
- Lidev
  Nacreous
  Aug 11, 2021
  Have you added a new self-ip (new subnet) on BIG-IP (Network ›› Self IPs) ?