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Step-by-Step Configuration and Troubleshooting Best Practices for the NGFW, NGIPS and AMP Technologies A Visual Guide to the Cisco Firepower Threat Defense (FTD)
New Member

Active/Standby And failover link configuration mode

Hi everyone,

When config failover  link of ASA  in Active Standby mode.

When we config failover int say gi0/1

config t

int gi0/1

failover lan int gi0/1

Need to confirm we do this from interface config mode  only or we can do this from global config also ????????

Whe we assign IP to this int we do that from global config mode ????

Regards

Mahesh

Message was edited by: mahesh parmar

Message was edited by: mahesh parmar

3 ACCEPTED SOLUTIONS

Accepted Solutions
Super Bronze

Active/Standby And failover link configuration mode

Hi,

All Failover configurations related to the interfaces are done from global configuration mode.

To my understanding when you originally choose the Failover link interface and use the "failover" configuration commands to name it and give it an IP address, the ASA will actually remove all configurations from interface used as the Failover interface. It will only add a description to the interface automatically.

You will be doing all Failover configurations on the global configuration mode.

- Jouni

Super Bronze

Re: Active/Standby And failover link configuration mode

Your Failover configuration on the original ASA5500 Series firewalls might look something like this

Primary Unit

failover

failover lan unit primary

failover lan interface failover Management0/0

failover key

failover replication http

failover link failover Management0/0

failover interface ip failover 10.10.10.1 255.255.255.0 standby 10.10.10.2

Secondary Unit

failover

failover lan unit secondary

failover lan interface failover Management0/0

failover key

failover replication http

failover link failover Management0/0

failover interface ip failover 10.10.10.1 255.255.255.0 standby 10.10.10.2

To my understanding the Management0/0 interface cant be used in Failover configuration in the new ASA5500-X series like it was typically used in the original ASA5500 Series (ASA5510 and forward)

- Jouni

Super Bronze

Re: Active/Standby And failover link configuration mode

Hi,

Actually the ASA lets you insert a lot of command what ever mode you are under.

In the output you posted is a very important thing to notice

configure mode commands/options:

  WORD  Specify the interface name

As you can see, the output lists only one option and before that it mentions that this is a "configure mode" command

So even if you entered the command under the interface configuration mode, it would still be entered as a global/configure command mode.

Take the following thing for example

I want to check what configuration options I have with the command "failover"

So I enter the following to my ASA

ASA(config)# failover ?

configure mode commands/options:

  interface              Configure the IP address to be used for failover and/or

                              stateful update information

  interface-policy    Set the policy for failover due to interface failures

  key                       Configure the failover shared secret or key

  lan                       Specify the unit as primary or secondary or configure the

                               interface and vlan to be used for failover communication

  mac                      Specify the virtual mac address for a dynamic interface

  polltime                Configure failover poll interval

  timeout                 Specify the failover reconnect timeout value for

                               asymmetrically routed sessions

 

exec mode commands/options:

  active          Make this system to be the active unit of the failover pair

  exec            Execute command on the designated unit

  reload-standby  Force standby unit to reboot

  reset           Force a unit or failover group to an unfailed state

As you can see, the ASA tells us that there are different additional command parameters after the "failover" command that can be used. Some of them can be used either in Exec or Configuration mode.

- Jouni

5 REPLIES
Super Bronze

Active/Standby And failover link configuration mode

Hi,

All Failover configurations related to the interfaces are done from global configuration mode.

To my understanding when you originally choose the Failover link interface and use the "failover" configuration commands to name it and give it an IP address, the ASA will actually remove all configurations from interface used as the Failover interface. It will only add a description to the interface automatically.

You will be doing all Failover configurations on the global configuration mode.

- Jouni

Super Bronze

Re: Active/Standby And failover link configuration mode

Your Failover configuration on the original ASA5500 Series firewalls might look something like this

Primary Unit

failover

failover lan unit primary

failover lan interface failover Management0/0

failover key

failover replication http

failover link failover Management0/0

failover interface ip failover 10.10.10.1 255.255.255.0 standby 10.10.10.2

Secondary Unit

failover

failover lan unit secondary

failover lan interface failover Management0/0

failover key

failover replication http

failover link failover Management0/0

failover interface ip failover 10.10.10.1 255.255.255.0 standby 10.10.10.2

To my understanding the Management0/0 interface cant be used in Failover configuration in the new ASA5500-X series like it was typically used in the original ASA5500 Series (ASA5510 and forward)

- Jouni

New Member

Re: Active/Standby And failover link configuration mode

Hi Jouni,

I checked that failover config are also available under interface config also

ASA1(config-if)# failover lan  interface  ?

configure mode commands/options:

  WORD  Specify the interface name

ASA1(config-if)# failover lan  interface  fail1 ?

configure mode commands/options:

  WORD  Specify dynamic interface

 

ASA1(config-if)# failover lan  interface  fail1

Do you know  why they are also available under interface config also?

Regards

Mahesh

Message was edited by: mahesh parmar

Super Bronze

Re: Active/Standby And failover link configuration mode

Hi,

Actually the ASA lets you insert a lot of command what ever mode you are under.

In the output you posted is a very important thing to notice

configure mode commands/options:

  WORD  Specify the interface name

As you can see, the output lists only one option and before that it mentions that this is a "configure mode" command

So even if you entered the command under the interface configuration mode, it would still be entered as a global/configure command mode.

Take the following thing for example

I want to check what configuration options I have with the command "failover"

So I enter the following to my ASA

ASA(config)# failover ?

configure mode commands/options:

  interface              Configure the IP address to be used for failover and/or

                              stateful update information

  interface-policy    Set the policy for failover due to interface failures

  key                       Configure the failover shared secret or key

  lan                       Specify the unit as primary or secondary or configure the

                               interface and vlan to be used for failover communication

  mac                      Specify the virtual mac address for a dynamic interface

  polltime                Configure failover poll interval

  timeout                 Specify the failover reconnect timeout value for

                               asymmetrically routed sessions

 

exec mode commands/options:

  active          Make this system to be the active unit of the failover pair

  exec            Execute command on the designated unit

  reload-standby  Force standby unit to reboot

  reset           Force a unit or failover group to an unfailed state

As you can see, the ASA tells us that there are different additional command parameters after the "failover" command that can be used. Some of them can be used either in Exec or Configuration mode.

- Jouni

New Member

Active/Standby And failover link configuration mode

Hi Jouni,

Seems you can also add config under interface config mode as shown below by my test

ASA1(config)# int ethernet 0/7

ASA1(config-if)# fail

ASA1(config-if)# failover lan

ASA1(config-if)# failover lan ?

configure mode commands/options:

  interface  Configure the interface and vlan to be used for failover

             communication

  unit       Configure the unit as primary or secondary

ASA1(config-if)# failover lan  int

ASA1(config-if)# failover lan  interface  ?

configure mode commands/options:

  WORD  Specify the interface name

ASA1(config-if)# failover lan  interface  test1 ?

configure mode commands/options:

  WORD  Specify dynamic interface

 

ASA1(config-if)# failover lan  interface  test1 vlan19

INFO: Non-failover interface config is cleared on Vlan19 and its sub-interfaces

ASA1(config)# end

ASA1# sh run int eth

ASA1# sh run int ethernet 0/7

!

interface Ethernet0/7

shutdown

ASA1# sh run fail

ASA1# sh run failover

failover

failover lan interface test1 Vlan19

But as you said when we do sh run it shows that under global config and not under inetrface config.

Many thanks  for helping on this.

Best regards

MAhesh

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