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FTD failover with 30sec outage

Martin Kyrc
Level 3
Level 3

Hello,

I can't solve issue with failover outage.

Setup:

  • 2x virtual FTD (ASA 9.9, firepower 2.3) running in failover
  • in DC1 (ESX-A) is runnig: FTD-1, SERVER-1
  • in DC2 (ESX-B) is runnig: FTD-2, SERVER-2
  • FTD is running transparent (bridge) mode
  • NW design: [ESX-A]-(trunk)-[SW-DC1]-(trunk)-[SW-CORE]-(trunk)-[SW-DC2]-[ESX-B]

Issue:

  • test1: manual failover to FTD-2:
    • connectivity to SERVER-2 is without outage during failover
    • but connectivity to SERVER-1 (the same DC as previous active FTD) is lost for 30sec
  • test2: manual failover to FTD-1:
    • connectivity to SERVER-1 is without outage during failover
    • but connectivity to SERVER-2 (the same DC as previous active FTD) is lost for 30sec

I have checked MAC address tables on all NW switches:

  • during normal operation have all mac addresses correct directions to GW or SERVER
  • during outage I can't see MAC address of the SERVER in VLAN connected to SERVER (between SERVER and FTD) (yes, this vlan is connected also to "real" NW world and virtual world on ESX)

my question is: 

  • how can I check/troubleshoot MAC address table on vSwitch? Is it possible?
  • what kind of timeout is 30sec?

martin

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