Time is required for protocol information to propagate throughout a switched network. 协定资讯在通过一个交换网路时是需要时间的。
A switched internetwork has converged when all the switch and bridge ports are in either the forwarding or blocking state. 当交换网路中全部的交换器与桥接器的埠处于转送或阻隔状态，表示这个网路已经收敛。
