AE Interface down during failover

FarzanaMustafa — Tue, 16 Feb 2021 05:17:20 GMT

We recently had a failover event during a normal upgrade of the firewall (10.0.1 -> 10.0.4). The LACP aggregate interface on the Cisco switch / Firewall did not come up during this time, which resulted in a longer than expected outage. Powered down firewall to restore original firewall connection.

We are using Active/Passive pair with PA-820.

Passive state link set to Auto.

Preemptive and Link Monitoring enabled.

Just to confirm that the switch should also be set to passive LACP in this instance as well?

It is interesting that this was the same configuration we had on the PA220 and it seemed to work.

> show lacp aggregate-ethernet all

LACP:

**********************************************************************************
AE group: ae1
Members: Bndl Rx state Mux state Sel state
ethernet1/1 no Port Disabled Detached Unselected(Link down)
ethernet1/3 no Port Disabled Detached Unselected(Link down)
Status: Enabled
Mode: Passive
Rate: Slow
Max-port: 2
Fast-failover: Enabled
Pre-negotiation: Disabled
Local: System Priority: 32768

System MAC: 84:d4:12:f8:89:01
Key: 48
Partner: System Priority: 0
System MAC: 00:00:00:00:00:00
Key: 0
Port State
--------------------------------------------------------------------------------
Interface Port
Number Priority Mode Rate Key State
--------------------------------------------------------------------------------
ethernet1/1 16 32768 Passive Slow 48 0x44
Partner 0 0 Passive Slow 0 0x00

ethernet1/3 18 32768 Passive Slow 48 0x44
Partner 0 0 Passive Slow 0 0x00

Port Counters
--------------------------------------------------------------------------------
Interface LACPDUs Marker Marker Response Error
Sent Recv Sent Recv Sent Recv Unknown Illegal
--------------------------------------------------------------------------------
ethernet1/1 0 0 0 0 0 0 0 0
ethernet1/3 0 0 0 0 0 0 0 0

**********************************************************************************
AE group: ae2
Members: Bndl Rx state Mux state Sel state
ethernet1/2 no Port Disabled Detached Unselected(Link down)
ethernet1/4 no Port Disabled Detached Unselected(Link down)
Status: Enabled
Mode: Passive
Rate: Slow
Max-port: 8
Fast-failover: Enabled
Pre-negotiation: Disabled
Local: System Priority: 32768
System MAC: 84:d4:12:f8:89:01
Key: 49
Partner: System Priority: 0
System MAC: 00:00:00:00:00:00
Key: 0
Port State
--------------------------------------------------------------------------------
Interface Port
Number Priority Mode Rate Key State
--------------------------------------------------------------------------------
ethernet1/2 17 32768 Passive Slow 49 0x44
Partner 0 0 Passive Slow 0 0x00

ethernet1/4 19 32768 Passive Slow 49 0x44
Partner 0 0 Passive Slow 0 0x00

Port Counters
--------------------------------------------------------------------------------
Interface LACPDUs Marker Marker Response Error
Sent Recv Sent Recv Sent Recv Unknown Illegal
--------------------------------------------------------------------------------
ethernet1/2 0 0 0 0 0 0 0 0
ethernet1/4 0 0 0 0 0 0 0 0

Re: AE Interface down during failover

MP18 — Tue, 16 Feb 2021 05:41:05 GMT

@FarzanaMustafa

Seems 10.0.4 is new code and is not recommended yet by PA.

For LACP one side needs to be in passive mode.
In your case it is PA then Switch must be in active mode.

Regards

Re: AE Interface down during failover

FarzanaMustafa — Fri, 19 Feb 2021 00:00:28 GMT

Thank you @MP18

We have been told by Palo Alto that we need to run the 10.0.4 for some security related reasons.

I realized that 'Enable HA in Passive State' box is not ticked. I am planning to test the failover again by using the settings below.

ae1
Mode Passive
Transmission rate Fast
Enable in HA Passive state Selected

ae2
Mode Passive
Transmission rate Fast
Enable in HA Passive state Selected

Is there any logs (pls provide the commands) I need to collect during failover if it doesn't work?

I will get the Tech Support file after the change.

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