Learning by Doing: CISCO Certified Network ... - SCN Research

Basic STP with One Router
Objective:
To learn how to add a router into a switched network using a redundant backup line with
STP.
Tools and Materials:
(2) workstations
(4) straight through cables (st)
(2) console cables
(1) Cross over cable (xo)
(2) 1900 series switches
(1) 2500/2600 series router
Lab Diagram:
L0
con
E0
st
E1
st
2 3
NIC
1 ax xo bx
st
com1
st
com1
workstation “A”
workstation “B”
Step-By-Step Instructions:
1. Cable the lab as shown. Ok. Now the fun starts. Use the 83.x.x.x network with a
16-bit mask. Oh don’t get complacent with the easy numbers. Pick your own
routing protocol to use.
2. Ping from workstation “A” to “B.” Ping from each workstation to the loopback
adapter. Use trace route for all three pings to verify the paths.
3. Use “sh ip route” to verify routes on the router.
4. Use debug stp on the router to see the changes in stp states over the network.
Take one of the main lines down and view the router messages.
5. Repeat steps 2-3 again with the main line down.
So What Have I Learned Here?
How to add a router into a switched network using back up lines and STP. In the next lab
you will work with the “metrics” with STP for selecting back up lines.
256