Forum Discussion
NimbostratusOne VServer, Multiple Pools and Forward Request to both Pools
Can I setup 1 Virtual Server to forward to 2 different Pools? Do I simply associated that VS to 2 Pools?
Current setup on BIG-IP LTM running firmware 10.2.4: 1 Virtual Server -> 1 App Pool -> 10 Backend Servers
Desired setup: 1 Virtual Server -> 2 App Pools -> 10 Backend Servers in Pool1 + 10 Backend Servers in Pool2.
The goal is to have redundancy of sending files to 2 different vendor systems belonging in 2 different Pools.
1 Reply
- Kai_Wilke
MVP
Hi James,
LTM's build-in cloning functionality is only able to clone traffic on a OSI Layer2 level (aka. packet duplication) and is intended to send a carbon copy of the incomming traffic to an NIDS system.
To clone the incomming request to two distinct nodes/application pools (at least different L3/4 information), you have to write a more or less complicated iRule which:
Note: Asuming you're trying to clone request for a website.
- Collects each incomming HTTP-Header and HTTP-Payload (if exists)
- Constructs a new HTTP-Request based on the collected HTTP-Header and HTTP-Payload
- Performs a handcrafted Load-Balaincing decission to choose a member of the second pool.
- Connects to the selected member of the secondary pool via a dedicated
(with ability to parse the response) or[SIDEBAND]
(one way communication) connection.[HSL] - Send the collected HTTP-Request to the established connection to the secondary pool member.
- Parses the response of the secondary pool member (if needed and [SIDEBAND] was used).
- Releases the original incomming request (without any modifications) and and then passes the response back to the client.
Cheers, Kai
