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I have following scenario, where i am getting 1G copper Cat6 cable from ISP and directly terminated on my Cisco ASA firewall on Gi0/8 interface and i have configured failover now my in failover output it is monitoring status (waiting) because they are coming from distinct router of ISP, how do i solve this issue without introducing any L2 switch between ISP and my ASA?

I can't ping outside interface of ASA-2 public IP from ASA-1 i am sure because of that i am seeing status waiting but is there any other work around? I do have many 1G interface free on ASA, can i create special VLAN and route traffic between or something?

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asa-1/sec/act# show failover
Failover On
Failover unit Secondary
Failover LAN Interface: FailoverLink Redundant1 (up)
Reconnect timeout 0:00:00
Unit Poll frequency 200 milliseconds, holdtime 800 milliseconds
Interface Poll frequency 500 milliseconds, holdtime 5 seconds
Interface Policy 1
Monitored Interfaces 3 of 1049 maximum
MAC Address Move Notification Interval not set
Version: Ours 9.6(3)1, Mate 9.6(3)1
Serial Number: Ours AAAAAA, Mate BBBBBB
Last Failover at: 00:41:50 UTC Mar 9 2018
    This host: Secondary - Active
        Active time: 504599 (sec)
        slot 0: ASA5585-SSP-20 hw/sw rev (2.0/9.6(3)1) status (Up Sys)
          Interface management (10.x.x.118): Normal (Monitored)
          Interface outside (74.xx.xx.110): Normal (Waiting)
          Interface inside (74.xx.xx.10): Normal (Monitored)
        slot 1: empty
    Other host: Primary - Failed
        Active time: 12 (sec)
        slot 0: ASA5585-SSP-20 hw/sw rev (1.3/9.6(3)1) status (Up Sys)
          Interface management (10.x.x.119): Normal (Monitored)
          Interface outside (74.xx.xx.109): Failed (Waiting)
          Interface inside (74.xx.xx.11): Normal (Monitored)
                slot 1: empty

ASA-2

asa-2/pri/stby# show failover
Failover On
Failover unit Primary
Failover LAN Interface: FailoverLink Redundant1 (up)
Reconnect timeout 0:00:00
Unit Poll frequency 200 milliseconds, holdtime 800 milliseconds
Interface Poll frequency 500 milliseconds, holdtime 5 seconds
Interface Policy 1
Monitored Interfaces 3 of 1049 maximum
MAC Address Move Notification Interval not set
Version: Ours 9.6(3)1, Mate 9.6(3)1
Serial Number: Ours BBBBBB, Mate AAAAA
Last Failover at: 00:42:40 UTC Mar 9 2018
    This host: Primary - Standby Ready
        Active time: 12 (sec)
        slot 0: ASA5585-SSP-20 hw/sw rev (1.3/9.6(3)1) status (Up Sys)
          Interface management (10.x.x.119): Normal (Monitored)
          Interface outside (74.xx.xx.109): Normal (Waiting)
          Interface inside (74.xx.xx.11): Normal (Monitored)
        slot 1: empty
    Other host: Secondary - Active
        Active time: 506081 (sec)
        slot 0: ASA5585-SSP-20 hw/sw rev (2.0/9.6(3)1) status (Up Sys)
          Interface management (10.x.x.118): Normal (Monitored)
          Interface outside (74.xx.xx.110): Normal (Waiting)
          Interface inside (74.xx.xx.10): Normal (Monitored)
                slot 1: empty

Interface configuration:

first i configured failover and then i run this command in this case it will set .109 ip on standby ASA-2 right?

!
interface GigabitEthernet0/0
 description 1G_HANDOFF
 nameif outside
 security-level 0
 ip address 74.xx.xx.110 255.255.255.248 standby 74.xx.xx.109
!

Failover config:

asa-1/sec/act# sh run failover
failover
failover lan unit primary
failover lan interface FailoverLink Redundant1
failover polltime unit msec 200 holdtime msec 800
failover polltime interface msec 500 holdtime 5
failover link FailoverLink Redundant1
failover interface ip FailoverLink 192.168.100.1 255.255.255.0 standby 192.168.100.2
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To solve this issue, you need at least a L2 switch in between.

If you would like to run dual ISPs, you can use another main/physical interface and terminate it on that L2 switch too, then separate L2 traffic between ISPs with different VLANs on L2 switch (ports on L2 switch connecting to Firewalls are access ports).

Another way to run dual ISPs is to create two sub-interfaces under main interface G0/0. Ports on L2 switch connecting to Firewalls now are trunk ports (with VLANs to separate L2 traffic between two ISPs).

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  • My both link coming from same ISP but just two different router for failover. I think I need to put L2 switch without that this is not possible, why Cisco didn't create easy solution for issue like this? – Satish Mar 15 '18 at 12:06
  • Finally I add L2 switch and moved on. – Satish Mar 17 '18 at 1:20
  • @Satish Glad to hear! And that is how it was designed. – Hung Tran Mar 17 '18 at 10:27
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You are not using your ASA's in a failover configuration, so you should not configure them that way. Use the command

no failover

If you goal is to have one primary link and a backup link, oyu can either use BGP routing from your ISP to inject a default route, or you can configure IP SLA and inject a route that way.

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  • Why do you saying that, my ISP using VRRP their end, but we don't have L2 device between :( – Satish Mar 14 '18 at 20:44
  • I have same setup in other place but there i have terminated ISP link on L2 switch and from there i have terminated on ASA-1 and ASA-2 – Satish Mar 14 '18 at 20:45
  • for BGP we need minimum /24 subnet to advertise, which is not possible because in my case i am using ASA for just VPN connection and put some host behind it to access. – Satish Mar 15 '18 at 2:43

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