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Krishna_R's avatar
Krishna_R
Icon for Nimbostratus rankNimbostratus
Jan 14, 2016

Running out of existing IP subnet range

Need help!

 

I am using a particular subnet 10.X.x.X/24 to configure any web applications on the load balancer as a VIP. However, i am running out of IPs and need to existing 10.x.x.x/24 as a new range 10.x.x.x/22 where the load balancer can accept the traffic.

 

The necessary changes will be done on the Switch.

 

What needs to be done on the load balancer for it to accept /22 traffic now. Its just extending the /24 subnet to /22 subnet.

 

Self IP will remain the same and i would like to know if i need to change the subnet mask for that self IP from 255.255.255.0 to 255.255.252.0

 

It would be great if someone has a step by step procedure.

 

BIG-IP
devops
LTM

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  • James_Thomson's avatar
    James_Thomson
    Icon for Employee rankEmployee
    Jan 18, 2016

    What version of code are you using? If it is a new enough version, just go into the GUI and change the netmask. It allows you to do this.

     

    If not, I would create a new selfIP with a different address and /22. Then delete your /24. Then, create a new selfIP with the old address and /22.

     

    Example. You now have 10.10.1.1/24 Create 10.10.1.2/22 delete 10.10.1.1/24 create 10.10.1.1/22 delete 10.10.1.2/22

     

    Now you have 10.10.1.1/22