QoS LLQ Congestion

Good day,
Can someone explain to me how LLQ determines that an interface is congested?

Thank you

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Cisco Catalyst 3560 and 3750 QoS Simplified... Seriously! - YouTube

Kevin wallace breaks down QOS very well in this video. I forgot where he talked LLQ, but its in here.

networker050184

When buffers fill basically.

Dieg0M

If you lower down the buffer with bandwidth command, will LLQ take effect at this rate? Also, if the LLQ is nested in a shaping policy, will it queue only when shaping policy rate hits?

networker050184

Are you talking about the bandwidth command on a router or L2 switch queuing? Either way you are not changing the size of any buffers.

If it is nested in a shaping policy yes when the shape rate is hit.

Dieg0M

Ok. So are packets marked for LLQ prioritized only when the buffer fills or always?

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