*) fixed queues - could have huge latencies and smaller throughput than specified;

*) interfaces report last link up/down time and link down count;

*) interfaces report last link up/down time and link down count;

Any info about it? I can´t find it on SXT r2

/interface print detail
<bla-bla-bla>
 4  R  name="vlan1321" type="vlan" mtu=1500 actual-mtu=1500 
       mac-address=00:00:00:00:00:01 fast-path=no 
       last-link-up-time=oct/30/2014 20:16:15 link-downs=0 

*) fixed 6to4 tunnels having inactive routes;

What's new in 6.21 (2014-Oct-30 12:34):
*) userman - fix "Your session has been reset due to inactivity" error;
*) timezone - updated timezone information to 2014i release;
*) wireless - fixed scanning tool crash for 802.11ac interfaces
*) wireless - fixed Nv2 kernel panic on 802.11ac interfaces
*) quickset - added vpn configuration to Wifi AP %26 Ethernet modes as well;
*) lte - changed device identification for devices which regenerate MAC address,
most likely this will loose device's configuration;
*) sstp - fixed disconnects on high traffic load;
*) ovpn client - fixed problem where ip address was not added to bridge interface in ethernet mode;
*) webfig - show properly Switch Port configuration;
*) disks - fixed support for MMC/SD cards;
*) winbox - added filtering by dscp to torch;
*) certificate - fix CRL handling in trust chain;
*) fixed 6to4 tunnels having inactive routes;
*) ipsec - fix downgrade problem to v5;
*) ipsec - disallow template-policy-group=none in peer config and set it to 'default';
*) metarouter - some metaroutes didn't have their licenses;
*) torch - possibility to filter by dscp;
*) fixed - master port on AR8327 switches that is put into bridge could sometimes not work properly;
*) fixed queues - could have huge latencies and smaller throughput than specified;
*) interfaces report last link up/down time and link down count;

*) interfaces report last link up/down time and link down count;

What's new in 6.21 (2014-Oct-30 12:34):
If you already run some RouterOS v6.x version, simply click “Check for updates” in QuickSet, Webfig or Winbox packages menu.

What's new in 6.21 (2014-Oct-30 12:34):
If you already run some RouterOS v6.x version, simply click “Check for updates” in QuickSet, Webfig or Winbox packages menu.

Hi
Take care.
I've just upgraded my 450G to 6.21. Now box reboots right after starting services, gives not enough time to even enter password in CLI.
BR
Modestas

*) fixed queues - could have huge latencies and smaller throughput than specified;

What's new in 6.21 (2014-Oct-30 12:34):
If you already run some RouterOS v6.x version, simply click “Check for updates” in QuickSet, Webfig or Winbox packages menu.

Hi
Take care.
I've just upgraded my 450G to 6.21. Now box reboots right after starting services, gives not enough time to even enter password in CLI.
BR
Modestas

Please connect a serial cable and check what is written on the output before it reboots. Once you have copied this and emailed support, you can Netinstall the device with v6.21 to fix the reboot

*) interfaces report last link up/down time and link down count;

After updating the device RB SXT G-2Hnd with 5.20 to 6.21, the device stopped working. Rebooting does not help.

Even an upgrade from 5.26 ( with new firmware) could have some risks, ....
With netflash you will get your device back to work.

Upgrades from v6.x seem to be working fine though