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show chassis fabric summary



Show summary fabric management state.


This command has no options.

Required Privilege Level


Output Fields

Table 1 lists the output fields for the show chassis fabric summary command. Output fields are listed in the approximate order in which they appear.

Table 1: show chassis fabric summary Output Fields

Field Name

Field Description


Plane number.


State of the SIB or FPC:

  • Online—Switch Interface Board (SIB) is operational and running.

  • Empty—SIB is powered down.

  • Check—SIB is in the Check state because of the following reasons:

    • SIB is not inserted properly.

    • Some destination errors are detected on the SIB. In this case, the Packet Forwarding Engine stops using the SIB to send traffic to the affected destination Packet Forwarding Engine.

    • Some link errors are detected on the channel between the SIB and a Packet Forwarding Engine. Link errors can be detected at initialization time or runtime:

      • Link errors caused by a link training failure at initialization time—The Packet Forwarding Engine does not use the SIB to send traffic. The show chassis fabric fpcs command shows Plane disabled as status for this link.

      • Link errors caused by CRC errors detected at runtime—The Packet Forwarding Engine continues to use the SIB to send traffic. The show chassis fabric fpcs command shows Link error as the status for this link.

    For information about link and destination errors, issue the show chassis fabric fpc commands.

  • Spare—SIB is redundant and will move to active state if one of the working SIBs fails.


Indicates whether there is any error on the SIB.

  • None—No errors

  • Link Errors—Fabric link errors were found on the SIB RX link.

  • Cell drops—Fabric cell drops were found on the SIB ASIC.

  • Link, Cell drops—Both link errors and cell drops were detected on at least one of the FPC’s fabric links.


    The Errors column is empty only when the FPC or SIB is offline.


Elapsed time the plane has been online.

Sample Output

show chassis fabric summary (SRX5600 and SRX5800 devices with SRX5000 line SCB II (SRX5K-SCBE) and SRX5K-RE-1800X4)

Release Information

Command introduced in Junos OS Release 9.2.