What's new in v2.6:

*) Make 'Change Password' work again;
*) CRS317 & CRS326: fixed DHCP request forwarding between trusted ports;
*) CRS317 & CRS326: fixed ACL vlanid match (values bigger than 1024 did not work);
*) CSS106-5G-1S: do not show health menu;
*) make upgrading work from Safari;
*) fixed saving of large lists of VLANs or ACLs;
*) fixed SNMP host table interface indexes;
*) fixed VLAN table sorting;
*) CSS106: fixed upgrading (to upgrade from v2.5 hit upgrade & then after a while reboot);

Hello bajodel, in case you have something plugged into CRS326 SFP+ ports, unplug it. Then try to boot SwOS and perform upgrade to v2.6. It should solve SwOS booting issues with active SFP+ ports.

BootROM 1.41
Booting from SPI flash
BootROM: Image checksum verification PASSED

RouterBOOT booter 3.43

CRS326-24G-2S+

CPU frequency: 800 MHz
  Memory size: 512 MiB
 Storage size:  16 MiB

Press <delete> key within 4 seconds to enter setup

RouterBOOT-3.43
What do you want to configure?
   ..[CUT]..
   j - boot os
   ..[CUT]..
your choice: j - boot os

Select what to boot:
   1 - RouterOS
 * 2 - SwOS
your choice: 2 - SwOS

RouterBOOT-3.43
What do you want to configure?
   ..[CUT]..
   g - upgrade firmware
   ..[CUT]..
your choice: g - upgrade firmware

Upgrade firmware options:
   e - upgrade firmware over ethernet
   s - upgrade firmware over serial port
your choice: e - upgrade firmware over ethernet

trying bootp protocol................. OK
Got IP address: 192.168.0.164
resolved mac address 00:26:88:F1:BE:01
Gateway: 192.168.0.1
transfer started  transfer ok, time=0.01s
invalid upgrade file id

Since v2.5 switch address acquisition mode by default is DHCP with fallback to static address. It is the reason why you, probably, see 0.0.0.0 address for about 10 seconds right after booting.

Kevo, it means that it will take 10s after reboot for SwOS DHCP Client to reach timeout and the previously configured static IP will become available again.

That's interesting, but looks like 2.6 release broke IPTV functionality for me.

That's interesting, but looks like 2.6 release broke IPTV functionality for me.
That's my setup: "hex PoE" -> RB260GS(CSS106-5G-1S) -> TV / Laptop etc.

On "hex PoE" I have multicast package installed and set-up. With RB260GS removed I see IGMP snooping working very well, i.e. via Ethernet on TVs and laptops, via "wAP AC" (connected to "hex PoE"). Moreover before I installed 2.6 on RB260GS all devices behind it worked well (I think I was on SwOS v2.5). But once v2.6 got installed I see 2 cases:
1) IGMP snooping is disabled on RB260GS: then only devices connected to the router ("hex PoE") have IPTV working.
2) IGMP snooping is enabled on RB260GS: in that case IPTV doesn't work anywhere in my network

Any ideas?

BTW is it possible to downgrade to 2.5 to check if my observations are correct and I'm seeing some sort of regression in v2.6?

That's interesting, but looks like 2.6 release broke IPTV functionality for me.

Just upgraded to 2.6 from 2.4, now IPTV is broken through CSS326-24G-2S+. Multicast stops and starts continuosly.
Where can I find 2.4 image? I would like to downgrade.

Thanks!

I figured older firmwares could be obtained from Mikrotik download area with manually changed version in the very end:
v2.4 - https://download2.mikrotik.com/swos2/cs ... 1s-2.4.bin
v2.5 - https://download2.mikrotik.com/swos2/cs ... 1s-2.5.bin
v2.6 - https://download2.mikrotik.com/swos2/cs ... 1s-2.6.bin

Does anyone has an idea how to stop the packet flood without IGMP snooping?