Palo Alto Networks Knowledgebase: 'Show interface management' displays link state of MGT interface as 'unknown/unknown'

'Show interface management' displays link state of MGT interface as 'unknown/unknown'

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Created On 02/08/19 00:01 AM - Last Updated 02/08/19 00:01 AM
Virtual Systems Virtualization
Symptom

Symptoms

Runtime link state (speed/duplex) shows 'unknown/unknown' when you run a command 'show interface management' on VM-Series Firewalls.

 

> show interface management
 
-----------------------------------------------------
Name: Management Interface
Link status:
  Runtime link speed/duplex/state: unknown/unknown/up
  Configured link speed/duplex/state: auto/auto/auto

 

Diagnosis



Resolution

This is expected behaviour in PAN-OS 8.0 and earlier.

 

You can find the speed/duplex state from the message in sysdagent.log which is generated when the link negotiation is performed or the link settings are changed.

 

  • When changing speed/duplex settings of management interface to '100Mbps-full-duplex':

     2017-08-01 13:19:47.826 +0900 NET: HW config: eth0: { 'mode': 2, 'setting': 5, }

     2017-08-01 13:19:47.826 +0900 NET: Changing eth0 to auto 0 adv 0x80 speed 100 duplex 1

  • When changing speed/duplex settings of management interface to '10Mbps-half-duplex':
     2017-08-01 16:51:21.261 +0900 NET: HW config: eth0: { 'mode': 2, 'setting': 2, }
     2017-08-01 16:51:21.261 +0900 NET: Changing eth0 to auto 0 adv 0x80 speed 10 duplex 0
  • When changing speed/duplex settings of management interface to 'auto-negotiate' (10GB full) :
     2017-08-01 13:25:00.407 +0900 NET: HW config: eth0: { 'mode': 1, 'setting': 1, }
     2017-08-01 13:25:00.407 +0900 NET: Changing eth0 to auto 1 adv 0xbf speed 10000 duplex 1

 



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