FlexLInk backup port Line Protocol is up

[Miha_Man]

Hi, 

I have two stacking 2960x switches and I need to configure it with two ports active/standby. When one of it go down, second one is up. I configured primary port with Flex link, like this:

interface GigabitEthernet1/0/5
switchport trunk native vlan 3
switchport trunk allowed vlan xxxx,xxxx
switchport mode trunk
switchport backup interface Gi2/0/5
switchport backup interface Gi2/0/5 preemption mode forced
switchport backup interface Gi2/0/5 preemption delay 50

So, if we do sho int gi 2/0/5 (backup port) command we can see that  Line protocol is UP.  

I don't wont that was Line protocol is UP on backup port.  I want backup port doesn't work, till primary port works.

How we can configure backup port, that would be Line protocol is down? So, is it really possible?

Thanks in advance

[paul driver]

Hello

No that's the way Flex-link works, Why do you want the backup be in a admindown state?

If don't want to use a flex-link. - You can achieve the admin port down state with a EEM script if you really wanted to have a backup link like you've queried.

[Miha_Man]

Hi,

Thank you for pointing to EEM idea. Really, no need Flex link if I would use script, but as I understood, cisco 2960x doesn't support EEM. Is it true? I have 2960x 15.2(2)E5 version and there aren't 'event manager' commands in configuration mode.

[paul driver]

Hello

In that case then you may be able to utilize a user defined macro however never done a triggered macro before so please review the attach doc for possible examples: here

[Miha_Man]

Hi,

I  resolved  this case.

Firs of all I upgraded IOS to 15.2(6)E2 version. This IOS has EEM feature.

Secondly, I configured "event manager session cli username "USERtest" privilege 15" command, because tacacs authentication server was configured. 

Then I configured event manager applet for two conditions. If primary port is up, do backup port down. If backup port is up, do primary port to down state. Some config here:

event manager session cli username "USERtest" privilege 15
event manager applet If_Primary-port_Down
event syslog pattern "Line protocol on Interface GigabitEthernet1/0/1, changed state to down"
action 0001 cli command "en"
action 0002 cli command "conf t"
action 0003 cli command "int gi2/0/1"
action 0004 cli command "no shutdown"

event manager applet If_Primary-port_UP
event syslog pattern "Line protocol on Interface GigabitEthernet1/0/1, changed state to up"
action 0001 cli command "en"
action 0002 cli command "conf t"
action 0003 cli command "int gi2/0/1"
action 0004 cli command "shutdown"

Hope it will useful for smbd.

Paul, thank you for pointing and attached files! It was helpful to resolve this case.

Best reguards, Mikhail.