Manual Chapter :
Internal Chassis Networking
Applies To:
Show Versions
F5OS-C
- 1.2.2, 1.2.1, 1.2.0
Internal Chassis Networking
Internal chassis networking overview
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 use 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 enables 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 these addresses:
- 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 and NTP server
- 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 using the
VELOS management interfaces (including the CLI, webUI, or REST APIs). This
is only an issue if you use 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.
Change the internal network IP range
The VELOS internal chassis network uses
100.64.0.0/12 addresses. If your network needs to use this range, you can change the
range of IP addresses that the internal chassis network implements. Instead, you can
choose one of 16 possible address ranges in the 10.0.0.0/12 address range.
It is recommended that you make this change before initial configuration
or immediately after.
- If you have not performed initial setup of the system and configured management IP addresses, connect using the management console. If setup is already complete, log in using the floating IP address.
- Log in to the command line interface (CLI) of the system controller using an account with admin access.When you log in to the system, you are in user (operational) mode.
- Change to config mode.configThe CLI prompt changes to include(config).
- Change the internal network range to RFC1918.system network config network-range-type RFC1918
- Show the network prefix index ranges.syscon-1-active(config)# system network config prefix ? Description: The network prefix index is used to select the range of IP addresses used internally within the chassis. The network prefix should be selected such that internal chassis addresses do not overlap with site-local addresses that are accessible to the chassis. Network Prefix Index Chassis Network Range 0 10.[0-15].0.0/12 1 10.[16-31].0.0/12 2 10.[32-47].0.0/12 3 10.[48-63].0.0/12 4 10.[64-79].0.0/12 5 10.[80-95].0.0/12 6 10.[96-111].0.0/12 7 10.[112-127].0.0/12 8 10.[128-143].0.0/12 9 10.[144-159].0.0/12 10 10.[160-175].0.0/12 11 10.[176-191].0.0/12 12 10.[192-207].0.0/12 13 10.[208-223].0.0/12 14 10.[224-239].0.0/12 15 10.[240-255].0.0/12 Possible completions: <unsignedByte, 0 .. 15>[0]
- Select the network range to use for internal networking (0-15).system network config prefix <0-15>For example, to set the range to 10.[0-15].0.0/12, set the network prefix index to 0.system network config prefix 0This example sets the VELOS internal chassis network to 10.[0-15].0.0/12.
- Commit the configuration changes.commit
- Power cycle the chassis.Changing the internal chassis network causes an automatic cluster reinstall process that takes approximately an hour to complete.
- Check the status of the cluster installation.show cluster install-progressA summary similar to this example displays:syscon-1-active# show cluster install-progress STAGE NAME STATUS --------------------------------- AddingBlade Done HealthCheck Done HostedInstall Done MasterAdditionalInstall Done MasterInstall Done NodeBootstrap Done NodeJoin Done Prerequisites Done ServiceCatalogInstall Done etcdInstall DoneWhen the install status is done for all stages, you can resume configuring the system.
