Hello, I've decided to make more use of CARP, but I'm not sure that I understand how "vhid" and "carpnodes" are supposed to work. So far, my reading of carp(4) and ifconfig(8) is as follows:
* If I have a number of aliases bound to a certain interface, I should move them all to individual carp interfaces, each with their own vhid value, and their own password. * On all hosts which are supposed to share one of these IP numbers, I configure similar carp interfaces using that same vhid value. * The numbering of the carp interfaces is only of local significance on a given machine, and has no effect on other machines on the same network. * If I want load balancing, then I'm going to use the "carpnodes" option, but now with individual vhid numbers for the same IP number on all affected nodes. The failover is now implicit because the non-working hosts simply don't advertise their MAC. * If I want several hosts forming a number of groups on the same LAN, I need to assign vhid values across all hosts, and passwords according to group membership. Example: DNS on hosts dns1 and dns2, and two web servers on hosts web1 and web2, totalling four machines in two groups. -- Kind regards, --Toni++
