Add an additional switch to IRF - sequence

[SeanDArmstrong]

Hello

I currently have 2 x 1 x HP 5500-24G switches configured in an IRF ring, connected as follows:

Switch 1 P1 - Switch 2 P2

Switch 1 P2 - Switch 2 P1

 I now need to add a third switch to the configuration

My plan was as follows:

Remove the cable that joins Switch 1 - P2 & Switch 2 P1 (Do I need to shut down the ports first?)

Configure the new switch with the same firmware as the two existing switches

Renumber the new switch to be member 3

irf domain 1

irf member 1 renumber 3

reboot

Shutdown the ports on the new switch

int ten-gigabitEthernet3/1/1 shutdown

int ten-gigabitEthernet3/1/2 shutdown

Configure the ports as IRF ports

irf-port 3/1 port group interface Ten-GigabitEthernet3/1/1 mode normal

irf-port 3/1 port group interface Ten-GigabitEthernet3/1/2 mode normal

Reboot

Connect the cables as follows:

Switch 1 P1 - Switch 2 P2

Switch 2 P1 - Switch 3 P2

Switch 3 P1 - Switch 1 P2

Power on the new switch (switch 3)

Enable the IRF ports on the new switch

int ten-gigabitEthernet3/1/1 shutdown

int ten-gigabitEthernet3/1/2 shutdown

disp irf topology

Save configuration

I have read that I need to ensure the current Master is configured with the highest priority to stop it from being overwritten.

Is there a simple command to do this?

Thanks

[mertdemi]

Hi Sean
you need to run
irf member 1 priority X

put highest number on X and lower numbers for member2 and 3.

make sure you backup config of existing switch. if accidentally new one becomes master old config might be erased
Also on your sequence I see some issues

Configure the ports as IRF ports



irf-port 3/1 port group interface Ten-GigabitEthernet3/1/1 mode normal



irf-port 3/1 port group interface Ten-GigabitEthernet3/1/2 mode normal

after the above configurations make sure no cable is connected to switch 3 and then you need to unshut port 3/1/1 and 3/2/2

then run

irf-port-configuration active

save

then connect cables as you suggested.If everything is ok
new switch will reboot itself and join the IRF.

[SeanDArmstrong]

Spoiler

Thank you for your input.

Will the original two switches stay up throughout this process? They have some ESXi hosts attached

Regards,
Sean