Rich Brown <[email protected]> wrote:
>As I write the SQM page, I find I have questions that I can’t answer
>myself. I’m going to post these questions separately because they’ll
>each generate their own threads of conversation.
>
>QUESTION #1: How does SQM shape the ingress?
>
>I know that fq_codel can shape the egress traffic by discarding traffic
>for an individual flow that has dwelt in its queue for too long
>(greater than the target). Other queue disciplines use other metrics
>for shaping the outbound traffic.
>
>But how does CeroWrt shape the inbound traffic? (I have a sense that
>the simple.qos and simplest.qos scripts are involved, but I’m not sure
>of anything beyond that.)
So ingress shaping conceptually works just as egress shaping. The
shaper accepts packets at any speed from both directions but limits the speed
used for transmitting them. So if your ingress natural bandwidth would be
100Mbit/s you would set the shaper to say 95Mbit/s, so the shaper will create
an internal artificial bottleneck just in front of its queue, so that it can
control the critical queue.
Technically, this works by creating an artificial intermediate
functional block device? (IFB), moving all ingress traffic to this device and
setting up classification and shaping on that device.
I hope this helps...
Sebastian
>
>
>_______________________________________________
>Cerowrt-devel mailing list
>[email protected]
>https://lists.bufferbloat.net/listinfo/cerowrt-devel
Hi Rich,
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
_______________________________________________
Cerowrt-devel mailing list
[email protected]
https://lists.bufferbloat.net/listinfo/cerowrt-devel
