弊宅の基幹スイッチの新しいソフトウェアバージョンが公開されているためアップグレードを実施する。

• Hardware: CRS310-1G-5S-4S+IN
• Old Version: 7.4.0
• New Version: 7.5.0

changelogs を確認

MikroTik Routers and Wireless - Software

うちで気になるのは下記

*) dns - added "address-list" parameter for static DNS entries (CLI only);
*) netwatch - changed ICMP default packet loss fail threshold to 85%;
*) ssh - fixed importing of public keys;
*) swos - enabled SwitchOS support for CRS310-1G-5S-4S+;
*) vrrp - added "sync-connection-tracking" compatibility with preemption-mode;
*) vrrp - fixed high CPU usage when "sync-connection-tracking=yes" and the backup router goes offline;
*) vrrp - fixed HW offloaded bridge MAC address learning when changing from VRRP master to backup;
*) vrrp - fixed initial connection tracking synchronization, a backup router now always receives all existing connections;
*) cloud - print critical log message when system clock gets synchronized;
*) console - fixed situation when print output was not consistent;
*) ssh - disable ssh-rsa when strong-crypto=yes and use rsa-sha2-sha256;
*) ssh - fixed host key generation (introduced in v7.3);
*) ssh - implemented "server-sig-algs" extension in order to improve rsa-sha2-sha256 support;

*) vrrp - fixed HW offloaded bridge MAC address learning when changing from VRRP master to backup; で弊宅で問題となっていた bridge の ageing-time=1m 時間分 VRRP で管理しているアドレスが消失すると接続断になる事象が改善されている可能性が出てきた。

手順は前回同様