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Question concerning migration on LTM

xmcrexap_245551
Nimbostratus
Nimbostratus

Hello,

 

I would like to have your advice concerning F5 migration (and more precisly migration from old F5 hardware to new F5 hardware).

 

I thought about different method of migration:

 

  1. One shot migration (tested without problem).
  2. Migration with modification from old VIP to new range and modification on client side or DNS (tested without problem).

I have thought of a third method (the architecture is organized around "one arm architecture" and auto-map SNAT):

 

- I keep all of my VIP address on the new architecture as on my old F5. - I desactivate VS address on all VIP, desactivate ARP and ICMP echo. - I connect the new architecture in parallel as the old.

=> As a consequence both architecture are in production, only the old F5 respond to VIP request (because ARP and ICMP echo are desactivate on new architecture).

 

=> When I want to migrate a VIP I just have to do:

 

- On old architecture desactivate VS address + ARP and ICMP echo. - On new architecture activate VS address + ARP and ICMP echo.

Some of you have already have done this method? Do you think this method can work or have impact?

 

Thank you for your advice.

 

M.

 

2 REPLIES 2

Leonardo_Souza
Cirrocumulus
Cirrocumulus

The virtual server part should work. However, you have to think about the self IPs, both floating and non-floating. Think about routing pointing to the F5, and also NAT you are doing in the F5.

 

Do you want to do all virtuals servers at the same time or one by one?

 

bijendras
Nimbostratus
Nimbostratus

Hi Matthieu,

I am trying to perform a similar hardware replacement so can you advise if the phase wise migration worked.

- On old architecture desactivate VS address + ARP and ICMP echo. - On new architecture activate VS address + ARP and ICMP echo.

Also if there are any observations/issues you faced during the cutover process.

My plan is similar and I want to cutover few vip's at a time.

Regards

Bijendra S Arora