Manual Chapter : Internal chassis networking

Applies To:

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F5OS

  • 1.1.1, 1.1.0
Manual Chapter

Internal chassis networking

The VELOS system uses an internal chassis network for control plane and management plane communication between firmware and software on the blades and system controllers. Traffic on this internal network is firewall-protected and is not exposed to a customer’s management network.
Internal VELOS chassis networking can utilize one of two IP address ranges known as RFC6598 and RFC1918. The RFC6598 address range maps the predefined VELOS internal network range to 100.64/12 IP addresses (the default). The RFC1918 range lets you choose one of 16 possible address ranges in the 10.0.0.0/12 address range.
IP addresses in the predefined range are reserved for the chassis network and cannot be used for any of the following:
  • VELOS management IP addresses for the system controllers, chassis partitions, and tenants
  • Any external service configured on the VELOS system, such as a DNS server, NTP server, and so on
  • Source IP addresses of any device used to communicate with the VELOS system (such as a laptop, workstation, or other device that connects)
If your network uses addresses in the default predefined range for any of the above, you will not be able to access the VELOS system by means of the VELOS management interfaces (including the CLI, webUI, or RESTCONF APIs). This is only an issue if using 100.64.0.0/12 addresses for VELOS management IP addresses, external servers, or source IP addresses described here. To prevent this issue, F5 provides a procedure that enables you to select a different internal IP address range during initial provisioning of a system, as an alternative to using the default range.