06-14-2019 03:09 AM
Hi:
I am configuring QoS and I have a doubt about priority command. Whats is the difference between:
class REALTIME
priority
police 20000000
... and:
class REALTIME
priority 20000
Thank you.
Regards,
Agustín
06-14-2019 04:01 AM
class REALTIME
priority 20000
The priority command provides a minimum bandwidth guarantee and have a built-in policer.
09-07-2019 11:56 PM
06-14-2019 05:34 AM
Hello
Qos priority is low latency queuing (LLQ) with is a version of priority queuing (PQ) but it doesn't starve lower priority class when congestion is on the link like PQ did
Policing is more invasive and will remark or drop packets once its defied police limit has been reached as apposed to shaping which wont drop packets but will buffer them until its can send them.
09-07-2019 11:57 PM
06-14-2019 05:46 AM
Hi
From the link that OMZ provided, this is the difference
"Any excess traffic is sent if the link is not congested or is dropped if the link is congested"
That means that from Your second example You are guaranteed 20M, but if there are unused bandwidth, You can send more traffic that is classified as priority. So if there are no other traffic than the priority You can get 100% of the bandwidth.
The first example means all traffic that is classified as priority is always prioritized, but as soon as the bandwidth goes above 20M it will be policed, and You can't get more, even if there are no other traffic.
Mikael
06-14-2019 09:12 AM
09-07-2019 11:58 PM
09-07-2019 11:58 PM
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