I was going through WB1 1.21 and wanted to get other's thoughts. It states that the configuration change should impact all currently active VLAN's and any additional VLANs created in the future. I understand that the timers are provided by the root bridge and the solution works for the currently active VLAN's but would not for and VLAN's created in the future. With that I configured the timers on SW1 as well as SW4 since that happens to be the backup for the active VLAN's and will end up being the root for all future VLAN's.
Which would be correct; just making the timer changes on SW1 (root for all current VLAN's) or changes on SW1 as well as SW4 (root for all future VLAN's)?