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jmanya_44531's avatar
jmanya_44531
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Oct 17, 2013

High Availability - From NetScaler to F5

Hello guys,

 

I am writing to you due to I need to see the light. Please...

 

Regarding a previus question I made, you may guess I am migrating a NetScaler Platform to F5. I have configured everything, but I need some help to understand and deploy F5 HA. I have read that every BIG IP need many IPs for the public segment. Such IPs would be the Self and the Floating for each ISP. There are three ISPs that the F5 must load balance. So, as I understand I need one IP for each ISP to configure Self IPs, so I'll need three IPs for one BIG IP. Then, I will need the same number (3) of different IPs for the other BIG IP. Finally, I'd need three IPs for Floating IPs. Therefore, I'll need 9 IPs to perform HA with F5. Due to I have two subnets in every ISP, I will need 18 IPs. The current deployment uses only three Public IPs, so my boss has told me that I cannot waste to much Public IPs. I need to find a solution where a failover takes place with no much public IPs in there. Is it possible to deploy an HA pair without having to look for more IPs? Can I reuse the same self IPs in both?

 

Please, any comment is welcome.

 

Regards

 

JM

 

1 Reply

  • Hmmm. Can you provide more detail on the IP setup please? I don't see how any setup (HA or otherwise) could accomodate two subnets for three ISPs with only three IPs. Surely the F5's don't need to actually have a 'leg' into each subnet? A bit of thought around NAT and/or routing should easily overcome the apparent wastage of addresses.