I have some questions about the master election in virtual chassis.
Please consider following scenarios:
We have three switches SW1,SW2,SW3All are using default priority.
We are using dynamic method to form Virtual chassis
Case#1SW1 is master, Sw2 is back, SW3 is a line card. Virtual chasis is formed and 30 minutes have elapsedWe introduce SW4 with priority 128 into Virtual chassis.
As per juniper , following is tie breaker:
1)Choose the member with the highest user-configured mastership priority (255 is the highest possible value). A switch with a mastership priority of 0 will always stay in the linecard role.
2)Choose the member that was master the last time the Virtual Chassis configuration booted.
3)Choose the member that has been included in the Virtual Chassis configuration for the longest period of time. (For this to be a deciding factor, there has to be a minimum time lapse of 1 minute between the power-ons of the individual interconnected member switches
4)Choose the member with the lowest MAC address.
Is it not true to criteria (3) above will be used to break the tie? The reason I said that Virtual chassis never booted, we form the Virtual chassis and never booted the Virtual chassis .
SW1 is master, Sw2 is back up RE, SW3 is a line card. Virtual chasis is formed.We reboot the virtual chassis first time . SW1 came up online first, SW2 2nd, SW3 third, Virtual chassis forms withSW1 MasterSW2 Back up RESW3 Line card.
After 30 minuutes, we introduce SW4 with priority 128 into virtual chassis .Following criteria will be used to break the tie:
Which crietria above, will apply to SW4? is it not (2)?
Thanks and have a nice weekend!!