typo on pg. 515

[hassaan]

On page 515, both the phones in figure 8.13 are labeled 'Phone A'. Shouldn't the phone connected to S2 be labeled 'Phone B', because that is how it's been described in the configuration.

[lammle]

That has been fixed in the latest printing.
thanks!
Todd

[lammle]

The RSTP Protocol:
Defines new port states. The 802.1D is defined in these different modes :

•Disabled = Discarding
•Blocking =Discarding
•Listening=Discarding
•Learning=Learning
•Forwarding=Forwarding

You can see that we just replaced disable, blocking, and listening with discarding mode. No big deal. Discarding mode serves the same purpose and the root bridge, root paths and forwarding ports are all figured out the same way as before. One more thing to remember is that the forward/filter table (mac address-table) is only populated in learning and forwarding modes (again, same as before).

RSTP is compatiable with the IEEE 802.1d protocol.
This means that a switch running RSTP (802.1w) connecting to a switch running 802.1d, as I show in my book, is backward compatible and will both just run 802.1d.