topic Thank´s for the answer Vibhor in Network Security

ASA failover pair Active / Standby

alexdelangel — Tue, 12 Mar 2019 05:15:54 GMT

Hello friends,

I got a pair of ASA 5545 working as Active/Standby. Sometimes the Secondary ASA gets the Active Role, that means this configuration is working pretty well. But I would like to know why failover is happening, it is happening such as 2 times per day. Is there a command to troubleshoot these events?

Please, feel free to request as much information as needed, any comment or documentation will be appreciated.

Regards!

There are few things you can

ajay chauhan — Thu, 25 Dec 2014 05:59:15 GMT

There are few things you can check on firewall to get the reason of failover .

1st- check uptime of your devices to see if they are rebooting.

2nd- how many interfaces you are monitoring if interfaces goes down that might cause failover.

commands-

show failover history

This is will tell you the reason for failover.

show monitor interface

This will tell me the state of interface -if normal then all good.

Thanks

Ajay

Hi,In addition to Ajay , I

Vibhor Amrodia — Thu, 25 Dec 2014 09:32:48 GMT

Hi,

In addition to Ajay , I think this command would tell you the exact interface name because of which the Fail-over might have occurred:-

show failover state

Check this on both the devices and it will show past events until and unless the device has been rebooted.

Thanks and Regards,

Vibhor Amrodia

Ajay / VibhorThank you so

alexdelangel — Thu, 25 Dec 2014 18:22:51 GMT

Ajay / Vibhor

Thank you so much for your help. I think I have found the reason of the failover events, look at the output of the show failover history command:

11:14:20 GMT Dec 22 2014
Active Config Applied Active Other unit wants me Active

03:25:03 GMT Dec 24 2014
Active Standby Ready Other unit wants me Standby

03:25:04 GMT Dec 24 2014
Standby Ready Failed Detect service card failure

03:25:06 GMT Dec 24 2014
Failed Standby Ready My service card is as good as peer

04:33:16 GMT Dec 24 2014
Standby Ready Just Active Other unit wants me Active

The Reason "Detect service card failure" means that the 8 port GigabitEthernet is working wrong? Do you know how RMA proceed, will them just replace the card or the whole chasis?

Regards!

Hi,This would mean that the

Vibhor Amrodia — Fri, 26 Dec 2014 03:07:38 GMT

Hi,

This would mean that the module which you have enabled on the ASA device was the issue. I don't think it is hardware as the modules are Software Based on these ASA-5500X devices.

I would say check show module output and see which module it is and if it working fine or not ?

Thanks and Regards,

Vibhor Amrodia

You might try reboot this

ajay chauhan — Fri, 26 Dec 2014 04:40:16 GMT

You might try reboot this device incase you see same things again open a case with cisco it should be only module replacement.

Thanks

Ajay

Thank´s for the answer Vibhor

alexdelangel — Fri, 26 Dec 2014 04:48:35 GMT

Thank´s for the answer Vibhor,

I will keep monitoring the state of the cxsc module, in this moment it shows an UP status.

Mod SSM Application Name Status SSM Application Version
---- ------------------------------ ---------------- --------------------------
ips Unknown No Image Present Not Applicable
cxsc ASA CX Up 9.2.1.1

Mod Status Data Plane Status Compatibility
---- ------------------ --------------------- -------------
0 Up Sys Not Applicable
ips Unresponsive Not Applicable
cxsc Up Up

Mod License Name License Status Time Remaining
---- -------------- --------------- ---------------
ips IPS Module Disabled perpetual

Getting back to the ouput of the show failover history command, the event of 03:25:03 GMT Dec 24 2014 about changing from Active to Standby Ready because Other unit wants me Standby.

Does it mean that someone entered the command no failover active?

Regards!

Thank´s for the answer Ajay,I

alexdelangel — Fri, 26 Dec 2014 05:23:37 GMT

Thank´s for the answer Ajay,

I will keep monitoring the cxsc software module. About the commando you suggested me to issue, the show monitor-interface, It show the next output:

# show monitor-interface
This host: Primary - Active
Interface OUTSIDE (192.168.10.2): Unknown (Waiting)
Interface INSIDE (192.168.10.9): Unknown (Waiting)
Interface DMZ (0.0.0.0): No Link (Waiting)
Other host: Secondary - Standby Ready
Interface OUTSIDE (0.0.0.0): Normal (Waiting)
Interface INSIDE (0.0.0.0): Normal (Waiting)
Interface DMZ (0.0.0.0): No Link (Waiting)

The interfaces of the Primary-Active device show an "Unknown" state, is it a good sign?

Regards!

Vibhor / AjayThe failover

alexdelangel — Sat, 03 Jan 2015 05:26:11 GMT

Vibhor / Ajay

The failover happened again, according to the show failover history command the issue was the cxsc module again. As you told me on previous comments it is just a software module, is it enough if I just reload the complete hardware? I have read in other discussions that reseating the older hardware modules is enough. According to the show failover command the module took such as one minute in showing the UP status again. Look at the next outputs:

Asa(config)# show failover
Failover On
Failover unit Secondary
Failover LAN Interface: FOLINK GigabitEthernet0/7 (up)
Unit Poll frequency 1 seconds, holdtime 15 seconds
Interface Poll frequency 5 seconds, holdtime 25 seconds
Interface Policy 1
Monitored Interfaces 3 of 316 maximum
Version: Ours 9.1(3), Mate 9.1(3)
Last Failover at: 09:45:32 GMT Jan 2 2015
        This host: Secondary - Active
                Active time: 191 (sec)
                slot 0: ASA5545 hw/sw rev (1.0/9.1(3)) status (Up Sys)
                  Interface OUTSIDE (192.168.1.2): Normal (Waiting)
                  Interface INSIDE (192.168.1.9): Normal (Waiting)
                  Interface DMZ (0.0.0.0): No Link (Waiting)
                slot 1: CXSC5545 hw/sw rev (N/A/9.2.1.1) status (Up/Up)
                  ASA CX, 9.2.1.1, Up
        Other host: Primary - Failed
                Active time: 796669 (sec)
                slot 0: ASA5545 hw/sw rev (1.0/9.1(3)) status (Up Sys)
                  Interface OUTSIDE (0.0.0.0): Unknown (Waiting)
                  Interface INSIDE (0.0.0.0): Unknown (Waiting)
                  Interface DMZ (0.0.0.0): No Link (Waiting)
                slot 1: CXSC5545 hw/sw rev (N/A/9.2.1.1) status (Unresponsive/Up)
                  ASA CX, 9.2.1.1, Not Applicable

Stateful Failover Logical Update Statistics
        Link : Unconfigured.

Asa(config)#

---------------------------------------------------------------------------------------------------------------------

Asa(config)# show fai history
==========================================================================
From State To State Reason
==========================================================================

09:45:32 GMT Jan 2 2015
Standby Ready Just Active Service card in other unit has failed

09:45:32 GMT Jan 2 2015
Just Active Active Drain Service card in other unit has failed

09:45:32 GMT Jan 2 2015
Active Drain Active Applying Config Service card in other unit has failed

09:45:32 GMT Jan 2 2015
Active Applying Config Active Config Applied Service card in other unit has failed

09:45:32 GMT Jan 2 2015
Active Config Applied Active Service card in other unit has failed

==========================================================================
Asa(config)#

-------------------------------------------------------------------------------------------------------------------

After such as one minute, the module that had failed on the Primary unit showed the UP status, and the unit changed to the Standby Ready Status:

Asa(config)# show failover
Failover On
Failover unit Secondary
Failover LAN Interface: FOLINK GigabitEthernet0/7 (up)
Unit Poll frequency 1 seconds, holdtime 15 seconds
Interface Poll frequency 5 seconds, holdtime 25 seconds
Interface Policy 1
Monitored Interfaces 3 of 316 maximum
Version: Ours 9.1(3), Mate 9.1(3)
Last Failover at: 09:45:32 GMT Jan 2 2015
        This host: Secondary - Active
                Active time: 266 (sec)
                slot 0: ASA5545 hw/sw rev (1.0/9.1(3)) status (Up Sys)
                  Interface OUTSIDE (192.168.10.2): Normal (Waiting)
                  Interface INSIDE (192.168.10.9): Normal (Waiting)
                  Interface DMZ (0.0.0.0): No Link (Waiting)
                slot 1: CXSC5545 hw/sw rev (N/A/9.2.1.1) status (Up/Up)
                  ASA CX, 9.2.1.1, Up
        Other host: Primary - Standby Ready
                Active time: 796669 (sec)
                slot 0: ASA5545 hw/sw rev (1.0/9.1(3)) status (Up Sys)
                  Interface OUTSIDE (0.0.0.0): Unknown (Waiting)
                  Interface INSIDE (0.0.0.0): Unknown (Waiting)
                  Interface DMZ (0.0.0.0): No Link (Waiting)
                slot 1: CXSC5545 hw/sw rev (N/A/9.2.1.1) status (Up/Up)
                  ASA CX, 9.2.1.1, Up

Stateful Failover Logical Update Statistics
        Link : Unconfigured.

Asa(config)#

Best Regards!

Hi,If the CX is causing

Vibhor Amrodia — Sat, 03 Jan 2015 08:36:36 GMT

Hi,

If the CX is causing random Fail-over events on the HA pair , Check this Defect:- https://tools.cisco.com/bugsearch/bug/CSCun48868/?reffering_site=dumpcr

Thanks and Regards,

Vibhor Amrodia

Thank´s for the answer Vibhor

alexdelangel — Wed, 07 Jan 2015 17:38:52 GMT

Thank´s for the answer Vibhor,

This is exactly the behavior of the ASA. According to the next release notes this issue was fixed on the release 9.1(5).

http://www.cisco.com/c/en/us/td/docs/security/asa/asa91/release/notes/asarn91.html#pgfId-751147

I will perform the upgrade of this failover pair on this weekend. Just one more thing, would you suggest me how to perform an upgrade of a failover pair?

I mean, should I stop the failover process between these devices, perform upgrades and then restablish the failover?

Regards!

Hi, I have been facing the

S.ashok S — Mon, 30 Mar 2015 07:28:46 GMT

Hi,

I have been facing the same issue with even 9.1(5) also.

Anybody know the solution. Kindly help.

Thanks in advance.

Thanks and regards,

Ashok Kumar S.

Hi Ashok,Would it be possible

Vibhor Amrodia — Mon, 30 Mar 2015 07:40:15 GMT

Hi Ashok,

Would it be possible if you can open a separate post and provide some outputs from the ASA device which would help us understand the issue ?

Thanks and Regards,

Vibhor Amrodia

Hi Vibhor,Thank you for your

S.ashok S — Mon, 30 Mar 2015 08:05:34 GMT

Hi Vibhor,

Thank you for your reply. I have opened new discussion and updated show fail output.

Thanks and regards,

Ashok Kumar S.