Switching

Hello,

By default there are 4 multicast queues with respective config if you don't configure your own queues.

8                   mcast-be
9                   mcast-ef
10                  mcast-af
11                  mcast-nc

I've observed that multicast is being classified into queues 8 and 11 with the system derived CoS.
Even if you configure, say queue 9 to be something else with classifiers and schedulers etc, the rest of the system derived queues remain as-is.

I'm looking for good documentation explaining this behavior but have been unable to find anything yet.

Regarding multicast I have been unable to find what I'm looking for here: Junos OS CoS for EX Series Switches Overview

Any help appreciated,
AJ

Hi

mcast-be: "be" means "Best Effort" 
mcast-ef: "ef" means "Expedited Forwarding"
mcast-af: "af" means "Assured Forwarding"
mcast-nc: "nc" means "Network Control"

Junos OS supports 3 classification methods. By default, Junos OS uses  BA Classification. With BA Classification(ipprec-compatibility Classifier), Junos OS uses only "be" and "nc" queue.

If you want to use "ef" or "af" queue,  you use Multifield classifier to set the class, or configure CoS to use DSCP. 

This might be helpful.

Default IP Precedence Classifier

I took Juniper's CoS on-demand course.  I recommend it,too.

https://learningportal.juniper.net/juniper/user_activity_info.aspx?id=12809

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RYOTA KOSAKA
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