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ASA acive/standby failover configuration

ggRM7865 asked
Last Modified: 2015-04-01
I am trying to find the best way to connect two ASA 5515 active/standby firewalls witha L3 Core switch and avoid the use of L2 switches to connect the interfaces and adding possible points of failures.
Attached is a diagram showing my idea of connecting them by using VLANs. (Please note that Vlan_DMZ, VLAN_EXT are not routable).

Please let me know if someone of you implemented this solution vs the use of L2 switches (or Crossover cables).

thank you for your help.
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