Fixes #21347: Fix IPv6 first available IP allocation for non-pool prefixes #258

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MrUnknownDE · 2026-04-05T16:23:50+02:00

MrUnknownDE commented

2026-04-05 16:23:50 +02:00

Originally created by @pheus on 3/2/2026

Fixes: #21347

This PR corrects available IP selection for IPv6 non-pool prefixes by excluding the subnet-router anycast address (RFC 4291). As a result, the “First available” allocation for a typical IPv6 prefix (e.g. /64) starts at ::1 instead of ::.

It also adds test coverage for IPv4/IPv6 pool behavior and the fully-usable edge cases (/31-/32 for IPv4 and /127-/128 for IPv6) to help prevent regressions.

*Originally created by @pheus on 3/2/2026* ### Fixes: #21347 This PR corrects available IP selection for IPv6 non-pool prefixes by excluding the subnet-router anycast address (RFC 4291). As a result, the “First available” allocation for a typical IPv6 prefix (e.g. `/64`) starts at `::1` instead of `::`. It also adds test coverage for IPv4/IPv6 pool behavior and the fully-usable edge cases (`/31`-`/32` for IPv4 and `/127`-`/128` for IPv6) to help prevent regressions.

MrUnknownDE closed this issue

2026-04-05 16:23:50 +02:00

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21455-sql-indexes-audit

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Reference: github/netbox#258