I have some serious issues using HSRP msec timers. I tried HSRP, HRSP v2 and GLBP ; all the same results
Actual : IOS 12.2(33)SXH
Old : IOS 12.2(18)SXF8
No physical problems, no errors on the interfaces, no STP problems (no redundant links) I tried to remove the port-channel, shutdown one of the two links and had the same symptoms...
The setup is simple, two 6506 + sup720 3B + 2GB port-channel between the two GB ports on each sup.
When I try to use anything less than 50 msec for hello and 150 msec for holddown I have a convergence the minute I do something ; anything like even "wr mem"
After debugging I see that the HSRP standby is not able to receive any hello from the HSRP active router each and every time the cpu is occupied (not 100% but 5% or more)
Thanks for any help, for now the timers are set at 250 msec for hello and 750 msec for holddown and everything seems ok.
Why with HSRP v2 the lowest value for hello is 15 msec when 50 msec is not even stable? I tried with 15 msec... disaster!