MST lab question....

[jimmysands73_2]

Just started MST book stuff, doing the first lab tonight, what is BOUN role?

MST02
  Spanning tree enabled protocol mstp
  Root ID    Priority    32770
             Address     0009.b79f.7d80
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32770  (priority 32768 sys-id-ext 2)
             Address     0009.b79f.7d80
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/7            Desg FWD 200000    128.7    P2p
Fa0/8            Desg FWD 200000    128.8    P2p
Fa0/9            Desg FWD 200000    128.9    P2p
Fa0/10           Desg FWD 200000    128.10   P2p
Fa0/11           Boun FWD 200000    128.11   P2p Bound(RSTP)
Fa0/12           Boun BLK 200000    128.12   P2p Bound(RSTP)

Switch#

[jimmysands73_2]

I have looked on here:

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/12ew/configuration/guide/mst.html#wp1019192

But could not find the answer (also seraching this thing we call the internet).

Is this it?

Boundary Ports

A boundary port is a port that connects to a LAN, the designated bridge of which is either an SST bridge or a bridge with a different MST configuration. A designated port knows that it is on the boundary if it detects an STP bridge or receives an agreement message from an RST or MST bridge with a different configuration.

At the boundary, the role of MST ports do not matter; their state is forced to be the same as the IST port state. If the boundary flag is set for the port, the MSTP Port Role selection mechanism assigns a port role to the boundary and the same state as that of the IST port. The IST port at the boundary can take up any port role except a backup port role.

[nkarpysh · Accepted solution]

You gave an answer - it is indeed Boundary Port to RSTP netwrok in your case.

Nik