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[EX/QFX5] When is IFL .16386 created?

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Article ID: KB31774 KB Last Updated: 23 May 2017Version: 1.0
Summary:

This article explains when logical interface .16386 is created. 

IFL *.16386 is created on 10G and 40G interface when SFP module is inserted without any logical unit (IFL) configuration.

Solution:
 
  • The default IFL (.16386) is added only when there are no IFLs configured on the interface.
  • The default IFL on the interfaces is to support VC auto-provisioning on (et-/xe-) interfaces.

Lab output:

Interface without any configuration.

labroot@SWITCH-1# show interfaces xe-0/0/2

{master:0}[edit]
labroot@SWITCH-1# run show interfaces terse xe-0/0/2
Interface               Admin Link Proto    Local                 Remote
xe-0/0/2                up    up
xe-0/0/2.16386          up    up
 

Interface with family ethernet-switching configuration.

labroot@SWITCH-1# show interfaces xe-0/0/2
unit 0 {
    family ethernet-switching;
}
 
{master:0}[edit]
labroot@SWITCH-1# run show interfaces terse xe-0/0/2
Interface               Admin Link Proto    Local                 Remote
xe-0/0/2                up    up
xe-0/0/2.0              up    up   eth-switch
 

In addition, the default IFL (.16386) is skipped in the following conditions:

  • When the interface has VLAN tagging.
  • If the interface is a member of an AE interface.
  • If the interface is channelized. 
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