Forum Discussion

Angel_Lopez_116's avatar
Angel_Lopez_116
Icon for Altostratus rankAltostratus
Dec 01, 2014

How is choosen the master or primary slot of the cluster?

Hi there, I'd like to know how the cluster master slot is choosen? Is there any rule or algorithm to choose the primary slot on boot? I'm wondering why my Viprion has decided this configuration a...
application delivery
guest
LTM
management
vcmp
virtualization
Brad_Parker_139's avatar
Brad_Parker_139
Icon for Nacreous rankNacreous

It doesn't matter which blade is chosen as the primary for either the vCMP host or vCMP guest. If you had more blades and more guests its entirely possible to have the primary of all of them be different. As to how that decision is made, I have not found documentation on that, though through observations it appears it generally chooses the first available slot but don't quote me on that. It may choose the least busy, but I honestly couldn't say for sure.

 

Brad_Parker_139's avatar
Brad_Parker_139
Icon for Nacreous rankNacreous
Dec 02, 2014
"When the cluster initializes, one blade is determined to be the primary blade and all other blades are secondary blades. In addition to processing traffic like other blades, the primary blade is a management blade, which sets and maintains the configuration for the whole cluster." https://support.f5.com/kb/en-us/solutions/public/10000/700/sol10778.html?sr=29127145