STP for Stone Temple Pilots
Posted by Aragoen Celtdra on 5th June 2008
At least that’s what I thought when I first heard the term. 
I don’t know, for some reason Spanning-tree Protocol and Rapid Spanning-tree protocol makes my head spin. I’m not completely new to STP – my boss even made me memorize the purpose of STP and the main causes of broadcast storms (broadcast, multicast, unknown unicast). Of course I had nary an idea what he was talking about. Until now, I seem to be struggling with the switching portion of my CCNA studies. But I can say that I know a ton more than I did just 3 months ago regarding STP and RSTP. I think.
Below is a simple example of what I’ll be practicing over and over for the next few days. It’s taken from the Odom INCD2 book starting on page 90. I basically took his example and created a simple mock lab out of it.
1.) Configure the topology above
2.) Configure VLAN 3
3.) Verify Spanning-tree operations
a. show spanning-tree vlan 3
b. show spanning-tree root
c. show spanning-tree vlan 3 bridge
4.) Configure STP cost on Fa0/17 to cost 2
a. spanning-tree vlan 3 cost 2
5.) Configure SW1’s switch priority to make it root switch
a. spanning-tree vlan 3 root primary
b. spanning-tree vlan 3 priority priority
6.) Configure Portfast on edge-type device (access interface)
a. spanning-tree portfast
7.) Configure BPDU guard on an access interface
a. spanning-tree bpduguard enable
8.) Configure etherchannel on fa0/16 and fa0/17 on both switches
a. channel-group 1 mode on | auto | desirable
b. show etherchannel 1 summary
9.) Ping SW1 and SW2 from each routers. Use extended ping to test end-to-end (host-to-host) connectivity
Posted in CCNA Notes, Lab, Spanning Tree | No Comments » | 