RouterOS 7.21.4 [long-term]

Tue, 21 Apr 2026 10:59:25 +0000

What's new in 7.21.4 (2026-Apr-21 09:49):

*) bgp - fixed stability issue when non-existent output select-chain was specified;
*) bgp-vpn - allow modifying scopes with routing filters;
*) bgp-vpn - fixed non-working import filter after reboot;
*) bgp-vpn - use target scope for imported route;
*) bridge - fixed missing dynamic "switch-cpu" VLAN entry in WiFi setup;
*) bridge - fixed performance regression in complex setups with vlan-filtering (introduced in v7.20);
*) console - removed the "reset" command from shared settings menus (IP/IPv6/Bridge/L3HW/Neighbor-Discovery/Connection-Tracking);
*) container - fixed issue where the container might not start after upgrading if root-dir was not set;
*) container - improved error message if a container fails to start;
*) defconf - fixed L009 configuration (introduced in v7.21);
*) ethernet - fixed false excessive broadcast warning (introduced in v7.20);
*) firewall - improved system stability;
*) ipsec - improved aes256-ctr stability on L009;
*) ipsec - removed modp8192 proposal on MIPS architectures;
*) ipv6,ra - use received prefix when RA on-link flag is 0;
*) isis - improved stability with fragmented CSNP;
*) l2tp - improved system stability on TILE architecture;
*) l3hw - fixed missing VLAN counters after reboot (introduced in v7.21);
*) l3hw - fixed stability issue (introduced in v7.21);
*) leds - fixed default LED configuration for CCR2004-1G-12S+2XS;
*) log - do not provide non-existent logging topics for configuration;
*) lte - fixed framed route support for the first APN;
*) lte - fixed missing automatic redial when cellular connectivity is lost for R11e-LTE;
*) lte - fixed user set MTU not applied to LTE interface;
*) lte - override the "auto" or 0 MTU in "interface" menu to 1500;
*) ospf - fixed typos in log messages;
*) ospf - improved stability on configuration change;
*) ovpn - fixed OVPN push routes;
*) poe-out - firmware update for CRS354-48P-4S+2Q+ (the update will cause a brief power interruption to poe-out interfaces);
*) poe-out - fixed rare PoE-Out firmware upgrade failure on CRS354-48P-4S+2Q+;
*) ptp - allow manual domain configuration for 802.1AS profile;
*) ptp - set DSCP (EF) for the default profile when using IPv4;
*) qos-hw - display queue0 limits for CPU port;
*) qos-hw - fixed "offline" tx-manager ability to queue at least one packet (introduced in v7.21);
*) qos-hw - prohibit setting CPU port with "offline" tx-manager;
*) route - added SLAAC route redistribution for IPv6 capable routing protocols;
*) route - do not set blackhole flag for synthetic routes;
*) route - improved service stability when removing routes;
*) routerboard - fixed applying settings via WinBox on devices with fixed CPU frequency;
*) routing-filter - added possibility to match SLAAC and bgp-mpls-vpn route types;
*) ssh - make login process asynchronous;
*) switch - fixed stability issue when changing bridge multicast-router property on CRS1xx/2xx (introduced in v7.19);
*) system - added FCC Part 15 Compliance label to "System/Regulatory" menu;
*) system - improved stability for internal RouterOS service communication;
*) system - improved system stability;
*) system - improved upgrade service stability when the server is unreachable;
*) system - included full certificate chain to Windows executables;
*) user - properly apply login delay (introduced in v7.20);
*) wifi-mediatek - fixed communication issues on 802.11ax access points with Intel clients;
*) wifi-mediatek - fixed HE capabilities IE on 2GHz band;
*) winbox - fixed "Remote AS" setting under the "Routing/BGP/Connections" menu;
*) winbox - fixed "Src/Dst Address Type" under the "IP/Firewall/NAT" menu;
*) winbox - fixed L3HW default value for VLAN interface (introduced in v7.21);
*) winbox - properly display multiple bands for multi-link interface clients under registration table;
*) winbox - rearrange filter wizard parameters in tabs;
*) www - improved service stability when cancelling REST API sessions;