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possible way, but not to be applicable for all sites.
- setup configuration file as /etc/network/interface.d/ifname
- configure only the main interface, which has IP address assigned
- hand configuration for other interfaces
- have lockout flag per host (group vars), which requires bonding for the main interface
Assuming:
- one interface has IP address to main network (e.g. PFS-LAN at summit, instrument control network at sites)
- other interfaces do not have IP address, just a bridge (e.g. V-LAN at summit)
- at initial installation by preseed, /etc/network/interfaces is written as DHCP, only two lines are there
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