RAM route replay regression — 2026-09-08
Environment: disposable DigitalOcean Ubuntu 24.04 amd64, 512 MiB plan
Kernel: 6.8.0-124-generic
Installer SHA-256: 4e7ac77c424febe23ae7a2c81539cac71c02bf5346c14b98251dd1ff18e8428b
Command on VM: python3 scripts/verify-network.py

PASS: IPv4 /32 with DHCP gateway host route (kernel route lookup and repeat replay)
PASS: IPv4 /32 with kernel gateway host route (kernel route lookup and repeat replay)
PASS: IPv4 directly connected /24 gateway (kernel route lookup and repeat replay)
PASS: IPv4 /32 explicitly onlink gateway (kernel route lookup and repeat replay)
PASS: IPv6 /128 with gateway host route (kernel route lookup and repeat replay)
PASS: IPv6 /128 explicitly onlink gateway (kernel route lookup and repeat replay)
PASS: live capture of 2 hardware NICs; MAC matching after rename, IPv4/IPv6 replay

The /32 host-route cases reproduce "Nexthop has invalid gateway" when the
default is restored first. The generated script restores the same captured
state successfully and preserves route lookup, preferred source, metric, and
onlink behavior. Test namespaces are removed after each case.

Packaged installer --help, POSIX shell parsing, and ram-init.sh Bash parsing
also passed on this VM. No installer runtime tests ran on the workstation.
Scope: Linux networking regression and packaging; no complete conversion or
Hetzner-hosted boot validation was performed for this patch.