Is spanning tree enabled by default?

[admin_2]

On a catalyst, is spanning tree enabled by default?

[#2]

yes, they are enabled by default. You need to do "set spantree disable" to disable it.

[Prashanth Krishnappa]

Best practice is to not to disable spanning-tree

http://www.cisco.com/warp/public/473/103.html#subfirstfive

Do not disable Spanning tree unless you have a strong reason to do so

[sachin]

by default , Spanning tree is enabled on a switch.but to take the advantage of spanning tree ..you need to configure a suitable switch in your topology as a root bridge.