but the root of the poor spanning, is impossible to eat,
Michael the network cat likes that song... reow
STP elects a root bridge (switch) and puts all root bridge
interfaces into forwarding state
Each non root bridge (switch)
determines which of its ports has the least administrative cost (best) to the
root bridge and STP makes that port that switch’s root port.
The switch with the lowest (best)
cost to the root is put in forwarding
state.
The lowest cost switch on each
segment is the designated bridge (switch) and the interface on that switch is
called the designated port.
The
root bridge’s (switch) ports are always in forwarding state and the root switch
(bridge) is always the designated bridge on all connected segments.
The
non root bridge root port is always forwarding. This port receives the lowest
cost BPDU from the root.
Each
LAN’s designated port is always forwarding and the bridge forwarding the lowest
cost BPDU is the segment’s designated bridge (switch)
All other ports are blocking. No forwarding
frames, no receiving frames.
At first each switch claims to be root
by sending BPDU’s that contain:
The root bridge ID- a
combination switch priority and MAC address, lower number, higher priority
The cost to reach the root- again the lower,
the better
And it’s own bridge ID
can't we just call a root bridge a root switch instead...
can't we just call a root bridge a root switch instead...
