User Manual
UMN:CLI
V5824G
245
Fig. 8.19
Network Convergence of 802.1w (2)
SWITCH B has only edge-designated port. Edge-designated does not cause loop, so it is
defined in 802.1w to be changed to forwarding state. Therefore, SWITCH B does not
need to block specific port to the forwarding state of SWITCH A. However since SWITCH
C has a port connected to SWITCH D, the port should be in the blocking state.
Fig. 8.20
Network Convergece of 802.1w (3)
It is same with 802.1d to block the connection of SWITCH D and SWITCH C. However,
802.1w does not need any configured time to negotiate between switches to make the
forwarding state of specific port. So it is progressed very fast. During the progress to the
port forwarding state, listening and learning are not needed. The negotiations use BPDU.
