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{ "lLangCode": "en", "lName": "English", "lCountryCode": "us", "transcode": "en_US" }
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Configuring MAC Pinning on Trunk Interfaces in Virtual Switches for Logical Systems

date_range 23-Nov-23

A MAC move occurs when a MAC address frequently appears on a different physical interface than the one it was learned on. Frequent MAC moves indicate the presence of loops. To avoid loops across interfaces in virtual switches in logical systems, you can configure MAC pinning. A set of logical systems within a single router can handle the functions previously handled by several small routers.

This topic describes how to configure MAC pinning on trunk interfaces in virtual switch routing instance of a logical system.

To configure MAC pinning on trunk interfaces in virtual switches for logical systems:

  1. Configure the interface and specify the encapsulation.
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    [edit interfaces]
    user@host# set interfacetype-fpc/pic/port flexible-vlan-tagging 
    user@host# set interfacetype-fpc/pic/port encapsulation flexible-ethernet-services
    
  2. Create the logical system by specifying the name of the logical system and specify the trunk interface.
    content_copy zoom_out_map
    [edit]
    user@host# set logical-systems logical-system-name interfaces interfacetype-fpc/pic/port unit logical-unit-number family bridge interface-mode trunk vlan-id-list vlan-id-numbers
    
  3. Configure the routing instance as a virtual switch and specify the trunk interface.
    content_copy zoom_out_map
    [edit routing-instances]
    user@host# set routing-instance-name  instance-type virtual-switch;
    user@host# set routing-instance-name  interface interfacetype-fpc/pic/port
    
  4. Configure the bridge domain and specify the list of VLAN IDs.
    content_copy zoom_out_map
    [edit routing-instances]
    user@host# set routing-instance-name  bridge-domains bridge-domain-name  vlan-id-list vlan-id-numbers
    
  5. Configure MAC pinning on the trunk interface at the [edit switch-options] hierarchy level.
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    [edit switch-options]
    user@host# set interface interfacetype-fpc/pic/port mac-pinning
    
  6. In configuration mode, verify the configuration.
    content_copy zoom_out_map
    user@host# show interfaces
    interfaces {
        interfacetype-fpc/pic/port {
            flexible-vlan-tagging; 
    		encapsulation flexible-ethernet-services;
        }
    }
    content_copy zoom_out_map
    user@host# show logical-systems
    logical-systems {
    logical-system-name {
            interfaces {
                interfacetype-fpc/pic/port {
                      unit logical-unit-number {
                        encapsulation vlan-vpls;
                        family bridge {
                            interface-mode trunk;
                            vlan-id-list vlan-id-numbers;
                        }
                    }
                }
            }
    
    content_copy zoom_out_map
    user@host# show routing-instances
    routing-instances {
                routing-instance-name {
                    instance-type virtual-switch;
                    interface interfacetype-fpc/pic/port;
                    bridge-domains {
                        bridge-domain-name  {
                            vlan-id-list vlan-id-numbers;
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    content_copy zoom_out_map
    user@host# show switch-options
    switch-options {
                interface interfacetype-fpc/pic/port {
                    mac-pinning;
                }
            }
        }
    }
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