convergence time

[jonk34567]

what is the convergence time of 

uplinkfast

backbonefast 

portfast

[Georg Pauwen · Accepted solution]

Hello,

you probably look for timers in seconds ?

uplinkfast --> 3 to 5 seconds instead of up to 30 second convergence

backbonefast --> 30 seconds (normal convergence minus Max_Age which is 20 seconds)

portfast --> immediately after linkup

[Joseph W. Doherty]

BTW, features like uplinkfast and backbonefast are proprietary Cisco enhancements.  If you want/need to use them you would likely be better using rapid-STP.