Randy Bush Sent: Tuesday, December 18, 2018 5:40 PM
do you have rfd on? with what parms?
randy
If I remember correctly the industry was back and forth on this several times now. First it was deemed good then some studies came out proving the penalty is worse than the crime couple years later another study came out suggesting that if correct parameters are used it should be alright, but I guess at that time no one could have cared less already switching it on and off and on again... With regards to the comments made here on the number of unstable routes till the whole system or significant parts collapse, I could easily revert that argument and ask how many badly configured rfd till the whole system shuts/dampens itself down... (positive vs negative feedback loop) I guess the ideal solution is somewhere in between. Personally I think rfd is just the aspirin, i.e. not treating the cause -but merely helping with the headaches. And I suspect that Interface State Dampening would address 80% of the route-flaps out there (it works exactly like rfd but treats the cause). With the reminder being true protocol flaps either by misconfiguration of max prefix limit (sessions should stay down) or BGP error handling -which again can be solved by the enhanced BGP error handling or genuine bugs. adam