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nagylzs
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CRS326, queue hw acceleration

Sun Aug 01, 2021 9:02 pm

As far as I understand, Css326 and crs326 switches have the same hardware, the only difference is in the installed software. I wonder if queue trees (especially mangled by dscp/priority tagging) are hardware accelerated in crs326 or not. (Or maybe it is not an issue, because CPU requirements for queues are low?)
 
msatter
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Re: CRS326, queue hw acceleration

Sun Aug 01, 2021 10:36 pm

The Wiki says: feature is not available, meaning that L3 Hardware offloading MUST be disabled for these features to work Maybe it will become avaiable in later versions of ROS 7.

Source: https://wiki.mikrotik.com/wiki/Manual:C ... Offloading

Currently: https://wiki.mikrotik.com/wiki/Manual:C ... ic_Shaping
 
nagylzs
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Re: CRS326, queue hw acceleration

Sun Aug 01, 2021 10:58 pm

This is interesting. So there is no stable CRS switch that could handle QoS (other than global egress/ingress rate limiting) by the hardware. I think that without hw offloading, the relatively slow CPU is not able to handle queues when it matters (e.g. when there is congestion on a 1 gig link). When there is no congestion, queues are not needed anyway. Sooooo if I really need to prioritize traffic, I guess I should not use CRS.
 
nagylzs
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Re: CRS326, queue hw acceleration

Sun Aug 01, 2021 11:02 pm

Well except CRS317-1G-16S+ :-)

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