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S12700 Series Agile Switches Typical Configuration Examples

This document provides examples for configuring features in typical usage scenarios.
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Example for Configuring Rate Limiting Based on VLAN IDs

Example for Configuring Rate Limiting Based on VLAN IDs

Overview

In addition to an ACL, a traffic classifier in MQC defines many Layer 2 and Layer 3 matching rules such as the VLAN ID, 802.1p priority, DSCP priority, source MAC address, and destination MAC address. You can configure different traffic classifiers on the device to identify packets and configure actions for them such as rate limiting, statistics, or mirroring.

In this example, traffic classifiers are configured based on VLAN IDs and different CIR values are configured so that the device allocates different bandwidth to service flows.

Configuration Notes

This example applies to all versions of the S12700.

NOTE:
For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Networking Requirements

In Figure 16-5, the Switch connects to the router through GE2/0/1, and the enterprise connects to the Internet through the Switch and router.

Voice, video, and data services are transmitted in VLAN 120, VLAN 110, and VLAN 100 respectively.

Traffic policing needs to be configured on the Switch to police packets of different services so that traffic is limited within a proper range, guaranteeing bandwidth of each service.

Voice, video, and data services have QoS requirements in descending order of priority. The Switch needs to re-mark DSCP priorities in different service packets so that the downstream router processes them based on priorities, ensuring QoS of different services.

Table 16-1 describes the QoS requirements.

Table 16-1  QoS guarantee for uplink traffic on the Switch

Traffic Type

CIR (kbit/s)

PIR (kbit/s)

DSCP Priority

Voice

2000

10000

46

Video

4000

10000

30

Data

4000

10000

14

Figure 16-5  Networking of traffic policing

Configuration Roadmap

The configuration roadmap is as follows:
  1. Create a VLAN and configure interfaces so that the enterprise can access the Internet through the Switch.
  2. Configure traffic classifiers on the Switch to classify packets based on VLAN IDs.
  3. Configure traffic behaviors on the Switch to limit the rate of packets and re-mark DSCP priorities of packets.
  4. Configure a traffic policy on the Switch, bind traffic behaviors and traffic classifiers, and apply the traffic policy to the interface on the Switch connected to the LSW.

Procedure

  1. Create VLANs and configure interfaces.

    # Create VLAN 100, VLAN 110, and VLAN 120 on the Switch.

    <HUAWEI> system-view
    [HUAWEI] sysname Switch
    [Switch] vlan batch 100 110 120
    

    # Configure GE1/0/1 and GE2/0/1 as trunk interfaces and add them to VLAN 100, VLAN 110, and VLAN 120.

    [Switch] interface gigabitethernet 1/0/1
    [Switch-GigabitEthernet1/0/1] port link-type trunk
    [Switch-GigabitEthernet1/0/1] port trunk allow-pass vlan 100 110 120
    [Switch-GigabitEthernet1/0/1] quit
    [Switch] interface gigabitethernet 2/0/1
    [Switch-GigabitEthernet2/0/1] port link-type trunk
    [Switch-GigabitEthernet2/0/1] port trunk allow-pass vlan 100 110 120
    [Switch-GigabitEthernet2/0/1] quit

  2. Configure traffic classifiers.

    # Configure traffic classifiers c1, c2, and c3 on the Switch to classify different service flows based on VLAN IDs.

    [Switch] traffic classifier c1 operator and
    [Switch-classifier-c1] if-match vlan-id 120  //Configure a matching rule to match packets with VLAN 120.
    [Switch-classifier-c1] quit
    [Switch] traffic classifier c2 operator and
    [Switch-classifier-c2] if-match vlan-id 110  //Configure a matching rule to match packets with VLAN 110.
    [Switch-classifier-c2] quit
    [Switch] traffic classifier c3 operator and
    [Switch-classifier-c3] if-match vlan-id 100  //Configure a matching rule to match packets with VLAN 100.
    [Switch-classifier-c3] quit
    

  3. Configure traffic behaviors.

    # Configure traffic behaviors b1, b2, and b3 on the Switch to police service flows and re-mark priorities of the service flows, and configure traffic statistics.

    [Switch] traffic behavior b1
    [Switch-behavior-b1] car cir 2000 pir 10000 green pass  //Set the CIR of packets with VLAN 120 to 2000 kbit/s.
    [Switch-behavior-b1] remark dscp 46  //Configure the device to re-mark DSCP priorities of packets from VLAN 120 with 46.
    [Switch-behavior-b1] statistic enable  //Enable traffic statistics.
    [Switch-behavior-b1] quit
    [Switch] traffic behavior b2
    [Switch-behavior-b2] car cir 4000 pir 10000 green pass
    [Switch-behavior-b2] remark dscp 30
    [Switch-behavior-b2] statistic enable
    [Switch-behavior-b2] quit
    [Switch] traffic behavior b3
    [Switch-behavior-b3] car cir 4000 pir 10000 green pass
    [Switch-behavior-b3] remark dscp 14
    [Switch-behavior-b3] statistic enable
    [Switch-behavior-b3] quit
    

  4. Configure a traffic policy and apply the traffic policy to an interface.

    # Create a traffic policy p1 on the Switch, bind the traffic classifiers and traffic behaviors to the traffic policy, and apply the traffic policy to GE1/0/1 in the inbound direction to police packets and re-mark the packet priorities.

    [Switch] traffic policy p1
    [Switch-trafficpolicy-p1] classifier c1 behavior b1
    [Switch-trafficpolicy-p1] classifier c2 behavior b2
    [Switch-trafficpolicy-p1] classifier c3 behavior b3
    [Switch-trafficpolicy-p1] quit
    [Switch] interface gigabitethernet 1/0/1
    [Switch-GigabitEthernet1/0/1] traffic-policy p1 inbound
    [Switch-GigabitEthernet1/0/1] quit
    

  5. Verify the configuration.

    # Check the traffic classifier configuration.

    [Switch] display traffic classifier user-defined
      User Defined Classifier Information:
       Classifier: c2
        Precedence: 10
        Operator: AND
        Rule(s) : if-match vlan-id 110
                 
       Classifier: c3
        Precedence: 15
        Operator: AND
        Rule(s) : if-match vlan-id 100
                 
       Classifier: c1
        Precedence: 5
        Operator: AND
        Rule(s) : if-match vlan-id 120
                 
    Total classifier number is 3 

    # Check the configuration of the traffic policy p1.

    [Switch] display traffic policy user-defined p1
      User Defined Traffic Policy Information:
      Policy: p1
       Classifier: c2
        Operator: AND
         Behavior: b2
          Permit
          Committed Access Rate:
            CIR 4000 (Kbps), PIR 10000 (Kbps), CBS 500000 (byte), PBS 1250000 (byte)
            Color Mode: color Blind
            Conform Action: pass
            Yellow  Action: pass
            Exceed  Action: discard
           Remark:                            
            Remark DSCP af33
          Statistic: enable 
       Classifier: c3
        Operator: AND
         Behavior: b3
          Permit
          Committed Access Rate:
            CIR 4000 (Kbps), PIR 10000 (Kbps), CBS 500000 (byte), PBS 1250000 (byte)
            Color Mode: color Blind
            Conform Action: pass
            Yellow  Action: pass
            Exceed  Action: discard
          Remark:
            Remark DSCP af13
          Statistic: enable
       Classifier: c1
        Operator: AND
         Behavior: b1
          Permit
          Committed Access Rate:
            CIR 2000 (Kbps), PIR 10000 (Kbps), CBS 250000 (byte), PBS 1250000 (byte)
            Color Mode: color Blind
            Conform Action: pass
            Yellow  Action: pass
            Exceed  Action: discard
          Remark:
            Remark DSCP ef
          Statistic: enable

    # Check information about the traffic policy that is applied to the interface. Voice packets on GE1/0/1 are used as an example. When the rate of the packets is larger than 10000 kbit/s, packet loss occurs. The rate of voice packets is limited within 10000 kbit/s.

    [Switch] display traffic policy statistics interface gigabitethernet 1/0/1 inbound verbose classifier-base class c1
    
     Interface:  GigabitEthernet1/0/1
     Traffic policy inbound: p1
     Rule number: 3
     Current status: success
     Statistics interval: 300   
    ---------------------------------------------------------------------
     Board : 1
    ---------------------------------------------------------------------
     Matched          |      Packets:                        49,491
                      |      Bytes:                               -
                      |      Rate(pps):                           0
                      |      Rate(bps):                           -
    ---------------------------------------------------------------------
       Passed         |      Packets:                        40,971
                      |      Bytes:                               -
                      |      Rate(pps):                           0
                      |      Rate(bps):                           -
    ---------------------------------------------------------------------
       Dropped        |      Packets:                         8,520
                      |      Bytes:                               -
                      |      Rate(pps):                           0
                      |      Rate(bps):                           -
    ---------------------------------------------------------------------
         Filter       |      Packets:                             0
                      |      Bytes:                               -
    --------------------------------------------------------------------- 
         Car          |      Packets:                         8,520
                      |      Bytes:                               -
    ---------------------------------------------------------------------
    

Configuration Files

Switch configuration file

#
sysname Switch
#
vlan batch 100 110 120
#
traffic classifier c1 operator and precedence 5 
 if-match vlan-id 120
traffic classifier c2 operator and precedence 10
 if-match vlan-id 110
traffic classifier c3 operator and precedence 15
 if-match vlan-id 100
#
traffic behavior b1
 permit
 car cir 2000 pir 10000 cbs 250000 pbs 1250000 mode color-blind green pass yellow pass red discard
 remark dscp ef
 statistic enable
traffic behavior b2
 permit
 car cir 4000 pir 10000 cbs 500000 pbs 1250000 mode color-blind green pass yellow pass red discard
 remark dscp af33
 statistic enable
traffic behavior b3
 permit
 car cir 4000 pir 10000 cbs 500000 pbs 1250000 mode color-blind green pass yellow pass red discard
 remark dscp af13
 statistic enable
#
traffic policy p1 match-order config
 classifier c1 behavior b1
 classifier c2 behavior b2
 classifier c3 behavior b3
#
interface GigabitEthernet1/0/1
 port link-type trunk
 port trunk allow-pass vlan 100 110 120
 traffic-policy p1 inbound
#
interface GigabitEthernet2/0/1
 port link-type trunk
 port trunk allow-pass vlan 100 110 120
#
return
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Updated: 2019-05-16

Document ID: EDOC1000069466

Views: 247501

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