Linecards of an EX9200 switch are showing in present state after removing MC-LAG configuration

This article describes the issue when trying to recover linecards after removing MC-LAG configuration that are showing in “present “ state and how to fix it.

Virtual chassis and MC-Lag cannot co-exist together on the same chassis causing the linecards go in present state throwing these errors in chassisd:

Feb 23 23:49:58 SCC: lcc_detach_interfaces_not_online lcc 0
Feb 23 23:49:58 SCC: in lcc_detach_interfaces_not_online vc mode is enabled.

MC-LAG configuration

First make sure Linecards are supported with the current version software, the output also states either “Hardware Not Supported” or “Hardware Not In Right Slot”.

Below you will find Linecard specifications:
http://www.juniper.net/documentation/en_US/release-independent/junos/topics/reference/specifications/line-cards-ex9200.html

The Virtual chassis configuration overrides the default behavior of the chassis thus we need to be sure of correct configuration.

Removing the configuration of virtual chassis as the intent was to create MC-LAG and not virtual chassis

To remove the virtual chassis configuration from the EX9200 , the following command is used :
>request virtual-chassis member-id delete

This triggered a reboot of the box and was restored to the default standalone settings and the LC’s came online.

[email protected]> show chassis fpc
show chassis fpc    
                     Temp  CPU Utilization (%)   Memory    Utilization (%)
Slot State            (C)  Total  Interrupt      DRAM (MB) Heap     Buffer
  0  Empty                
  1  Present           23
  2  Empty
  3  Present           23
  4  Empty           
  5  Empty           
  6  Empty

After removing the Virtual chassis configuration LineCards will show online.

[email protected]> show chassis fpc pic-status
Slot 1   Online       EX9200 32x10G SFP
  PIC 0  Online       8X10GE SFPP
  PIC 1  Online       8X10GE SFPP
  PIC 2  Online       8X10GE SFPP
  PIC 3  Online       8X10GE SFPP
Slot 3   Online       EX9200 32x10G SFP
  PIC 0  Online       8X10GE SFPP
  PIC 1  Online       8X10GE SFPP
  PIC 2  Online       8X10GE SFPP
  PIC 3  Online       8X10GE SFPP

Please note If after removing the configuration of the Virtual-Chassis, re-inserting the LineCard, rebooting the chassis and the LineCard does not come online, open a Juniper TAC case of suspecting hardware problem.

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