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Example: Configuring Queuing and Shaping on Logical Interfaces in PTX Series Packet Transport Routers

date_range 10-Jun-24

You can enable per-logical interface queuing on interfaces on PTX Series Packet Transport Routers and specify a scheduler map and traffic-shaping rate for each logical interface.

Requirements

This example uses the following hardware and software components:

Junos OS Evolved Release 24.2R1 or later.
One PTX10004 router with LC1201 or LC1202 line card.

Overview

This example shows how to configure six VLANs on six logical interfaces, enable per-logical interface queuing, and specify a scheduler map and traffic-shaping rate for each logical interface. The total traffic-shaping rate combined for all logical interfaces cannot exceed 100 Gbps.

CLI Quick Configuration

To configure logical interface queuing and traffic shaping on the PTX10004 router, copy the following commands and paste them into the terminal window of the router:

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[edit]
set interfaces et-2/0/0 vlan-tagging
set interfaces et-2/0/0 per-unit-scheduler
set interfaces et-2/0/0 unit 0 vlan-id 0
set interfaces et-2/0/0 unit 1 vlan-id 1
set interfaces et-2/0/0 unit 2 vlan-id 2
set interfaces et-2/0/0 unit 3 vlan-id 3
set interfaces et-2/0/0 unit 4 vlan-id 4
set interfaces et-2/0/0 unit 5 vlan-id 5

set class-of-service classifiers dscp dscp_v4 forwarding-class GOLD loss-priority low code-points 000000
set class-of-service classifiers dscp dscp_v4 forwarding-class SILVER loss-priority low code-points 000001
set class-of-service classifiers dscp dscp_v4 forwarding-class BRONZE loss-priority low code-points 000010
set class-of-service classifiers dscp dscp_v4 forwarding-class BE loss-priority low code-points 000011
set class-of-service classifiers dscp dscp_v4 forwarding-class BE1 loss-priority low code-points 000100
set class-of-service classifiers dscp dscp_v4 forwarding-class BE2 loss-priority low code-points 000101
set class-of-service classifiers dscp dscp_v4 forwarding-class BE3 loss-priority low code-points 000110
set class-of-service classifiers dscp dscp_v4 forwarding-class BE4 loss-priority low code-points 000111

set class-of-service forwarding-classes class GOLD queue-num 0
set class-of-service forwarding-classes class SILVER queue-num 1
set class-of-service forwarding-classes class BRONZE queue-num 2
set class-of-service forwarding-classes class BE queue-num 3
set class-of-service forwarding-classes class BE1 queue-num 4
set class-of-service forwarding-classes class BE2 queue-num 5
set class-of-service forwarding-classes class BE3 queue-num 6
set class-of-service forwarding-classes class BE4 queue-num 7

set class-of-service schedulers GOLD transmit-rate percent 20
set class-of-service schedulers SILVER transmit-rate percent 20
set class-of-service schedulers BRONZE transmit-rate percent 10
set class-of-service schedulers BE transmit-rate percent 10

set class-of-service schedulers GOLD priority high
set class-of-service schedulers SILVER priority medium-high
set class-of-service schedulers BRONZE priority medium-low
set class-of-service schedulers BE priority low

set class-of-service scheduler-maps OUT forwarding-class GOLD scheduler GOLD
set class-of-service scheduler-maps OUT forwarding-class SILVER scheduler SILVER
set class-of-service scheduler-maps OUT forwarding-class BRONZE scheduler BRONZE
set class-of-service scheduler-maps OUT forwarding-class BE scheduler BE
set class-of-service scheduler-maps OUT forwarding-class BE1 scheduler BE
set class-of-service scheduler-maps OUT forwarding-class BE2 scheduler BE
set class-of-service scheduler-maps OUT forwarding-class BE3 scheduler BE
set class-of-service scheduler-maps OUT forwarding-class BE4 scheduler BE

set class-of-service interfaces et-2/0/0 unit 0 scheduler-map OUT
set class-of-service interfaces et-2/0/0 unit 1 scheduler-map OUT
set class-of-service interfaces et-2/0/0 unit 2 scheduler-map OUT
set class-of-service interfaces et-2/0/0 unit 3 scheduler-map OUT
set class-of-service interfaces et-2/0/0 unit 4 scheduler-map OUT
set class-of-service interfaces et-2/0/0 unit 5 scheduler-map OUT

set class-of-service interfaces et-2/0/0 unit 0 shaping-rate 20g
set class-of-service interfaces et-2/0/0 unit 1 shaping-rate 16g
set class-of-service interfaces et-2/0/0 unit 2 shaping-rate 16g
set class-of-service interfaces et-2/0/0 unit 3 shaping-rate 16g
set class-of-service interfaces et-2/0/0 unit 4 shaping-rate 16g
set class-of-service interfaces et-2/0/0 unit 5 shaping-rate 16g

Procedure

Step-by-Step Procedure

To configure the PTX10004 router:

Enable the reception and transmission of 8021.q VLAN-tagged frames on the interface:
```
[edit interfaces]
user@host# set et-2/0/0 vlan-tagging
```
Enable per-logical interface scheduling on the interface:
```
[edit interfaces]
user@host# set et-2/0/0 per-unit-scheduling
```

Specify a VLAN identifier for each logical interface:

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[edit interfaces]
user@host# set et-2/0/0 unit 0 vlan-id 0
user@host# set et-2/0/0 unit 1 vlan-id 1
user@host# set et-2/0/0 unit 2 vlan-id 2
user@host# set et-2/0/0 unit 3 vlan-id 3
user@host# set et-2/0/0 unit 4 vlan-id 4
user@host# set et–2/0/0 unit 5 vlan-id 5

Define classifiers to assign incoming packets to forwarding classes based on each packet's code point value and loss priority:

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[edit class-of-service classifiers]
user@host# set dscp dscp_v4 forwarding-class GOLD loss-priority low code-points 000000
user@host# set dscp dscp_v4 forwarding-class SILVER loss-priority low code-points 000001
user@host# set dscp dscp_v4 forwarding-class BRONZE loss-priority low code-points 000010
user@host# set dscp dscp_v4 forwarding-class BE loss-priority low code-points 000011
user@host# set dscp dscp_v4 forwarding-class BE1 loss-priority low code-points 000100
user@host# set dscp dscp_v4 forwarding-class BE2 loss-priority low code-points 000101
user@host# set dscp dscp_v4 forwarding-class BE3 loss-priority low code-points 000110
user@host# set dscp dscp_v4 forwarding-class BE4 loss-priority low code-points 000111

Assign each forwarding class to a queue:

content_copy zoom_out_map
[edit class-of-service forwarding-classes]
user@host# set class GOLD queue-num 0
user@host# set class SILVER queue-num 1
user@host# set class BRONZE queue-num 2
user@host# set class BE queue-num 3
user@host# set class BE1 queue-num 4
user@host# set class BE2 queue-num 5
user@host# set class BE3 queue-num 6
user@host# set class BE4 queue-num 7

Define schedulers, each with their own transmit rate and priority:

content_copy zoom_out_map
[edit class-of-service schedulers]
user@host# set GOLD transmit-rate percent 20
user@host# set SILVER transmit-rate percent 20
user@host# set BRONZE transmit-rate percent 10
user@host# set BE transmit-rate percent 10

user@host# set GOLD priority high
user@host# set SILVER priority medium-high
user@host# set BRONZE priority medium-low
user@host# set BE priority low

Define a scheduler map that maps a scheduler to each forwarding class (and therefore queue):

content_copy zoom_out_map
[edit class-of-service scheduler-maps]
user@host# set OUT forwarding-class GOLD scheduler GOLD
user@host# set OUT forwarding-class SILVER scheduler SILVER
user@host# set OUT forwarding-class BRONZE scheduler BRONZE
user@host# set OUT forwarding-class BE scheduler BE
user@host# set OUT forwarding-class BE1 scheduler BE
user@host# set OUT forwarding-class BE2 scheduler BE
user@host# set OUT forwarding-class BE3 scheduler BE
user@host# set OUT forwarding-class BE4 scheduler BE

Assign the scheduler map to each logical interface:
```
[edit class-of-service interfaces]
user@host# set et-2/0/0 unit 0 scheduler-map OUT
user@host# set et-2/0/0 unit 1 scheduler-map OUT
user@host# set et-2/0/0 unit 2 scheduler-map OUT
user@host# set et-2/0/0 unit 3 scheduler-map OUT
user@host# set et-2/0/0 unit 4 scheduler-map OUT
user@host# set et-2/0/0 unit 5 scheduler-map OUT
```
Note:
Keep in mind, with per-logical interface queueing, each logical interface has eight queues and can have its own scheduler map for its own service profile.

Specify the amount of bandwidth to allocate to each logical interface:

content_copy zoom_out_map
[edit class-of-service interfaces]
user@host# set et-2/0/0 unit 0 shaping-rate 20g
user@host# set et-2/0/0 unit 1 shaping-rate 16g
user@host# set et-2/0/0 unit 2 shaping-rate 16g
user@host# set et-2/0/0 unit 3 shaping-rate 16g
user@host# set et-2/0/0 unit 4 shaping-rate 16g
user@host# set et-2/0/0 unit 5 shaping-rate 16g

Results

Confirm your results by entering the show interfaces and show class-of-service commands:

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user@host# show interfaces
et-2/0/0  {
    per-unit-scheduling
    vlan-tagging;
    unit 0 {
        vlan-id 0;
    }
    unit 1 {
        vlan-id 1;
    }
    unit 2 {
        vlan-id 2;
    }
    unit 3 {
        vlan-id 3;
    }
    unit 4 {
        vlan-id 4;
    }
    unit 5 {
        vlan-id 5;
    }
}

content_copy zoom_out_map
user@host# show class-of-service
classifiers {
    dscp dscp_v4 {
        forwarding-class BE {
            loss-priority low code-points 000011;
        }
        forwarding-class BE1 {
            loss-priority low code-points 000100;
        }
        forwarding-class BE2 {
            loss-priority low code-points 000101;
        }
        forwarding-class BE3 {
            loss-priority low code-points 000110;
        }
        forwarding-class BE4 {
            loss-priority low code-points 000111;
        }
        forwarding-class BRONZE {
            loss-priority low code-points 000010;
        }
        forwarding-class GOLD {
            loss-priority low code-points 000000;
        }
        forwarding-class SILVER {
            loss-priority low code-points 000001;
        }
    }
}
forwarding-classes {
    class BE queue-num 3;
    class BE1 queue-num 4;
    class BE2 queue-num 5;
    class BE3 queue-num 6;
    class BE4 queue-num 7;
    class BRONZE queue-num 2;
    class GOLD queue-num 0;
    class SILVER queue-num 1;
}interfaces {
    et-2/0/0 {
        unit 0 {
            scheduler-map OUT;
            shaping-rate 20g;
        }
        unit 1 {
            scheduler-map OUT;
            shaping-rate 16g;
        }
        unit 2 {
            scheduler-map OUT;
            shaping-rate 16g;
        }
        unit 3 {
            scheduler-map OUT;
            shaping-rate 16g;
        }
        unit 4 {
            scheduler-map OUT;
            shaping-rate 16g;
        }
        unit 5 {
            scheduler-map OUT;
            shaping-rate 16g;
        }
    }
}
scheduler-maps {
    OUT {
        forwarding-class BE scheduler BE;
        forwarding-class BE1 scheduler BE;
        forwarding-class BE2 scheduler BE;
        forwarding-class BE3 scheduler BE;
        forwarding-class BE4 scheduler BE;
        forwarding-class BRONZE scheduler BRONZE;
        forwarding-class GOLD scheduler GOLD;
        forwarding-class SILVER scheduler SILVER;
    }
}
schedulers {
    BE {
        transmit-rate percent 10;
        priority low;
    }
    BRONZE {
        transmit-rate percent 10;
        priority medium-low;
    }
    GOLD {
        transmit-rate percent 20;
        priority high;
    }
    SILVER {
        transmit-rate percent 20;
        priority medium-high;
    }
}

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Class of Service User Guide (Routers and EX9200 Switches)

ON THIS PAGE

Example: Configuring Queuing and Shaping on Logical Interfaces in PTX Series Packet Transport Routers

Requirements

Overview

Configuration

CLI Quick Configuration

Procedure

Step-by-Step Procedure

Results

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Class of Service User Guide (Routers and EX9200 Switches)

ON THIS PAGE

Example: Configuring Queuing and Shaping on Logical Interfaces in PTX Series Packet Transport Routers

Requirements

Overview

Configuration

CLI Quick Configuration

Procedure

Step-by-Step Procedure

Results

Related Documentation

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