YueGuobin c3cc067eea
docs: document the BusyBox ifup CIDR trap in the docker init path
BusyBox ifup — what runs in /gns3/init.sh unless the image ships its
own ifupdown — only brings up 'auto' stanzas and rejects CIDR notation
in the address line ("don't have all variables for <iface>/inet"),
leaving the interface unconfigured after a container restart.

Document the constraint next to the ifup call and in the generated
/etc/network/interfaces sample, where addressing gets written.
2026-08-28 23:26:24 +08:00
..