Changes

• Upgrade Linux kernel to 6.18.25 (LTS)
• Upgrade Buildroot to 2025.02.13 (LTS)
• Add support for per-bridge multicast router port in operational, issue #395
• Add support for static ARP (IPv4) and neighbor cache (IPv6) entries per interface, issue #819. Static entries are installed as permanent kernel neighbor table entries that are never evicted by normal ARP/NDP aging
• Add support for PTP/gPTP (IEEE 1588-2019 / 802.1AS) clock synchronization. Supported clock types: Ordinary Clock, Boundary Clock, and Transparent Clock. See the User Guide for configuration details
• Add support for Banana Pi BPI-R4, quad-core Cortex-A73 router with 4x 2.5 GbE switching, dual 10 GbE SFP+. Variants BPI-R4-2g5 and BPI-R4P have one SFP+ replaced by a 2.5 GbE RJ45, with optional PoE on the R4P
• Update Marvell ESPRESSObin board support. Allow booting with stock U-Boot, which only supports ext4 rootfs partitions; to use, apply the ext4 developer snippet before building (make apply-ext4 all)
• Fix onboard WiFi support on the Banana Pi BPi-R64

Fixes

• Fix #520: warn in syslog if multicast flooding is disabled
• Fix #769: document dummy interfaces in user guide
• Fix #790: document static multicast filters in user guide
• Fix #1439: changing hostname does not regenerate DHCP client conf until restart
• Fix #1458: show ntp tracking displaying a truncated Reference ID, e.g., 92.2 instead of 92.246.137.39
• Fix #1466: show container showing no output for containers whose command line includes environment variables
• Fix issue with IGMP queries sent with all-zeroes source MAC address
• Fix missing IGMP query startup burst when assuming IGMP querier role, as defined in RFC3376 §8.6/§8.7
• Fix Raspberry Pi 4 and Pi 400 display instability after soft reboot. Previously the touchscreen/DSI display required a full power cycle to reinitialise correctly; it now works reliably after reboot. Please note, you need a fairly up-to-date EEPROM version as well
• Fix BPI-R4 board README showing inverted DIP switch values for eMMC and SPI NAND boot modes, which would prevent the board from booting correctly
• Fix SAMA7G54 U-Boot build system selection that caused build failures
• Fix BPI-R3 PCIe devices failing to initialize on boot due to a missing clock definition in the device tree