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logical unit is not allowed on aggregated links

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  • 1.  logical unit is not allowed on aggregated links

    Posted 03-10-2020 23:21

    Why does this config fail? How do I get rid of errors?  Thanks

     

    @juniper-ptx1k# set interfaces et-0/0/58 unit 0 family inet address 192.168.10.2/32    
    
    [edit]
    root@juniper-ptx1k# commit 
    [edit interfaces et-0/0/58]
      'unit 0'
         logical unit is not allowed on aggregated links
    error: configuration check-out failed
    
    [edit]
    root@juniper-ptx1k# 
    
    root@juniper-ptx1k# show interfaces         
    apply-groups [ FILTERS-FOR-JFLOW AE-INTERFACES-TO-SPINE INTERFACES-TO-CORE-MPE INTERFACES-TO-BFB-CORE ];
    et-0/0/58 {
        unit 0 {
            family inet {
                address 192.168.10.2/32;
            }
        }
    }
    ae35 {
        mtu 2500;
    }
    


  • 2.  RE: logical unit is not allowed on aggregated links
    Best Answer

    Posted 03-10-2020 23:33

    The error indicates that Interface et-0/0/58 is a member of an AE (Aggregated Ethernet) bundle and logical unit  is not allowed on member links / physical interfaces. Please check the group configuration to check AE inteface details. 

    show configuration groups

    show interfaces terse | match ae

     

     



  • 3.  RE: logical unit is not allowed on aggregated links

     
    Posted 03-11-2020 00:07

    Or use "show configuration interfaces | display inheritance" ...  Ulf



  • 4.  RE: logical unit is not allowed on aggregated links

    Posted 03-11-2020 00:49

    Thanks for the response. What is the 'unit' in the command: set interfaces et-x/x/x unit 0 family inet address x.x.x.x/24? I didn't really have a firm grasp of what the unit is.



  • 5.  RE: logical unit is not allowed on aggregated links

     
    Posted 03-11-2020 00:55

    think subinterface or logical interface (as opposed to physical interface / port)



  • 6.  RE: logical unit is not allowed on aggregated links

    Posted 03-11-2020 06:59

    Hi PL2, 

     

    I hope you are doing great!

     

    If i am not wrong there used to be a KB for this error, but couldn't find it, anyways you can check this link which shows an AE configuration side to side.

     

    https://www.juniper.net/documentation/en_US/junos/topics/topic-map/aggregated-ethernet-interfaces-lacp-configuring.html

     

    In the other hand we shouldn't configure unit 0 on child interfaces of the AE, because the only configuration allow is:

     

    [edit interfaces interface-name]
    user@host# set (fastether-options | gigether-options) 802.3ad aex
     
    Juniper devices will come with unit 0 configure in all ports, so every time you create a bundle you will need to go and delete unit 0.
     
    Pablo


  • 7.  RE: logical unit is not allowed on aggregated links

     
    Posted 03-11-2020 07:08

    Hi PL2,

     

    You have so many group applied on this interface:

     

    apply-groups [ FILTERS-FOR-JFLOW AE-INTERFACES-TO-SPINE INTERFACES-TO-CORE-MPE INTERFACES-TO-BFB-CORE ];

     

    I believe one of the group is making this part of a AE bundle, probably AE-INTERFACES-TO-SPINE, once an interface is part of AE bundle you can't apply unit config to it.

     

    In order to see the effective configuration (interface level configuration + configuration applied via groups) you can use following command:

     

    "show configuration interface et-0/0/58 | display inheritance no-comment"

     

    In order to confirm which group is applying which part of the config use following command:

     

    "show configuration interface et-0/0/58 | display inheritance "

     

    If you don't want to use the interface as part of AE bundle remove that group from interface config.

     

    PS: Please accept my response as solution if it answers your query, kudos are appreciated too!

     

    Thanks

    Vishal