Allied Telesis AT-S79 manual Mixed STP and Rstp Networks

AT-S79 Management Software User’s Guide

Mixed STP and RSTP Networks

AT-GS950/2424-Port 10/100/1000Mbps + 2 SFP Combo WebSmart Switch
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												SPEED
												LINK/ACT
												SPEED
												LINK/ACT		LINK/ACT
POWER	2	4	6	8	10	12	14	16	18	20	22	24	23	24
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																						Edge Port
														Hub								1	2	3	4
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Figure 27. Edge Port

Aport can be both a point-to-point and an edge port at the same time. Figure 28 illustrates a port functioning as both a point-to-point and edge port. You must manually configure the edge port status.

AT-GS950/2424-Port 10/100/1000Mbps + 2 SFP Combo WebSmart Switch
1	3	5	7	9	11	13	15	17	19	21	23
											SPEED
											LINK/ACT
											SPEED
											LINK/ACT		LINK/ACT
POWER 2	4	6	8	10	12	14	16	18	20	22	24	23	24
													732
													Point-to-Point and Edge Port
													Workstation
													(Full-duplex Mode)

Figure 28. Point-to-Point and Edge Port

Determining whether a bridge port is point-to-point, edge, or both, can be a bit confusing. For that reason, do not change the default values for this RSTP feature unless you have a good grasp of the concept. In most cases, the default values work well.

RSTP IEEE 802.1w is fully compliant with STP IEEE 802.1d. Your network can consist of bridges running both protocols. STP and RSTP in the same network can operate together to create a single spanning tree domain.

The switch monitors the traffic on each port for BPDU packets. When you set the switch to RSTP mode, all the ports operate in that mode and reject STP BPDU packets. When you set the switch to operate in STP-

Section I: Using the Menus Interface 113