Switching

Hello Experts,

Trying to configure QOS on my EX4500 and stuck. I am hoping that someone will help me as I am new to Junos QOS.

I want a certain traffic (in my case is a udp multicast traffic) to mark it with DSCP EF 46 on Ingress interface and that trafic will exit my switch via Egress interface to the other part of the network. 

Ingress Interface -----Switch-----Egress Interface

In Cisco world i would configure the following on ingress interface:

ip access-list extended video
permit ip any 234.5.2.0 0.0.0.255
!
class-map match-all VIDEO
match access-group name video
!
policy-map MARK-TRAFFIC
class VIDEO
set dscp ef
!
interface Port-channel9

description Ingress Interface
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 9,41
switchport mode trunk
mtu 9216
service-policy input MARK-TRAFFIC

On my Juniper box am trying to configure the follwing:

show interfaces xe-0/0/33
description Ingress Interface;
mtu 9216;
unit 0 {
family ethernet-switching {
port-mode trunk;
vlan {
members [ Data Video ];
}
}
}

show | compare
[edit interfaces xe-0/0/33 unit 0 family ethernet-switching]
+ filter {
+ input VIDEO-MARKING;
+ }
[edit]
+ class-of-service {
+ classifiers {
+ dscp MARK-VIDEO-TRAFFIC {
+ forwarding-class expedited-forwarding {
+ loss-priority low code-points ef;
+ }
+ }
+ }
+ }
[edit firewall family ethernet-switching]
filter TEST_FILTER { ... }
+ filter VIDEO-MARKING {
+ term VIDEO {
+ from {
+ destination-address {
+ 234.5.2.0/24;
+ }
+ }
+ then {
+ accept;
+ forwarding-class expedited-forwarding;
+ }
+ }
+ term Rest_of_the_Traffic {
+ then accept;
+ }
+ }

and getting a warning as follow while checking with "commit check":

[edit firewall family ethernet-switching filter VIDEO-MARKING term VIDEO then forwarding-class]
'forwarding-class expedited-forwarding'
To configure forwarding-class, loss-priority must be set
error: configuration check-out failed: (statements constraint check failed)

So my question is - am I on the right direction? I cant seem to figure out where should i configure forwarding-class, loss-priority.

Many Thanks

Hi Jeronimo777,

Please add the below line to your config and try commit again.

set firewall family ethernet-switching filter VIDEO-MARKING term VIDEO then loss-priority low

commit

Thanks rsuraj, successfully configured. Do you know how can I view QOS statistics? Particularly I am interested that switch is indeed marking traffic with dscp(dec) value 46. So far I was able to find the below command

show class-of-service classifier type dscp

Classifier: MARK-VIDEO-TRAFFIC, Code point type: dscp, Index: 29220
Code point Forwarding class Loss priority
101110 expedited-forwarding low

{master:0}

it indeed shows that I have configured classsifier but what other show commands will be helpfull?

Many Thanks