Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

escman's avatar
escman
Icon for Cirrus rankCirrus
Aug 18, 2023

Outbound iRule / BGP routing

Hey sirs, I would like to ask a question about the order of precedence/execute of a connection that consumes a forwarding virtual server/routing table. Currently, we have a forwarding any:0 virtual...
application delivery
bgp
cloud
irule
outbound
security
escman's avatar
escman
Icon for Cirrus rankCirrus
Aug 19, 2023

Hi Paulius,

My main question is how does a connection is handled by F5 (which triggered first, routing table or vip behavior), assuming that I have a BGP session for route the outbound traffic and also have a forwarding IP VIP with default_gateway_pool and irule.

Thank you

JRahm's avatar
JRahm
Icon for Admin rankAdmin
Aug 21, 2023

HI escman, the important thing to understand is that the routing table is HOW packets are forwarded on BIG-IP, but that is completely moot if a listener (virtual server) is not configured to allow traffic to flow through the BIG-IP. As far as precedence is concerned with the virtual servers, that information is covered in knowledge article K14800.