RSTP question

[ciscoben2009]

Hi All

I am setting up the topology attached and am using RSTP for fail over but when i remove the 100mb link the switch fail over to the 10mb link but drop about 9 pings and takes around 40 sec

I have read that this can be almost sub second is this true or am i doing something wrong?

Many thanks

Ben

[cmarva · Accepted solution]

did you configure them for rapid and then connect the devices together?

or were they already connected and then you converted the switches to rapid?

if #1, it should have worked with fast convergence

if #2, you need to issue "clear spanning-tree detected protocols" for rapid to kick in. The swiches run spanning tree

according to the first bpdu it hears on a link. So if you didn't issue this clear command that's probably why you're still

seeing legacy convergence times. This command is documented as well as the conditions when you need to issue

this command.

hope this helps, chris

[ciscoben2009]

spot on thanks alot !