turning portfast on a router

Unanswered Question
Feb 1st, 2007

I understand a Spanning Tree could be used on a switch, but could it also be used on a router?

I have this problem too.
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sundar.palaniappan Thu, 02/01/2007 - 10:37

As you are probably aware, STP is a layer 2 protocol. Router is a layer 3 device but router interfaces can also be configured as layer 2 ports, using bridge-group command, in that case you can enable STP in a router and it functions the same way in the router.

HTH

Sundar

axfalk Thu, 02/01/2007 - 11:29

Thanks...What is the downside enabling STP on a router? thanks again...

sundar.palaniappan Thu, 02/01/2007 - 14:00

Agree with the previous poster. Naturally, when you add more processes it's going to require more CPU cycles but with the powerful processing capacity of the newer routers that shouldn't be a big problem. If you can then keep bridging separate from routing functions. However, if you have to bridge/route traffic from this router then that shouldn't be a problem.

HTH

Sundar

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