Siemens S223 Self Loop Detection, Configure the specific port as edge-port, Configure Bpdu Guard

User Manual	UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

To configure BPDU guard in the switch, perform the following procedure.

Step 1

Configure the specific port as edge-port.

Command	Mode	Description
stp edge-port PORTS	Bridge	Configures the port as Edge port.
no stp edge-port PORTS		Disables Edge port configuration.

Step 2

Configure BPDU Guard.

Command	Mode	Description
stp bpdu-guard	Bridge	Configures BPDU Guard function on switch.
no stp bpdu-guard		Disables BPDU Guard function.

However, BPDU Guard can be corrupted by unexpected cause. In this case, the edge port is blocked immediately and remains at this state until user recovers it. To prevent this problem, the hiD 6615 S223/S323 switch provides BPDU guard auto-recovery function. When an edge port is down for BPDU packet which came from other switch, the port is recovered automatically after configured time.

To configure BPDU Guard auto-recovery, use the following command.

Command	Mode	Description
stp bpdu-guard auto-recovery		Configures BPDU Guard auto-recovery on switch.
stp bpdu-guard auto-recovery-		Configures BPDU Guard auto-recovery-time.
time <10-1000000>
	Bridge
no stp bpdu-guard auto-
recovery		Disables BPDU Guard auto-recovery function.
no stp bpdu-guard auto-
recovery-time

To recover a blocked port by manually, use the following command.

Command	Mode	Description
stp bpdu-guard err-recovery	Bridge	Recovers a blocked port by manually.
PORTS

8.3.9.7Self Loop Detection

Although there is no double path in user’s equipment, loop can be caused by network en- vironment and cable condition connected to equipment. To prevent this, the hiD 6615 S223/S323 has self loop detection to perceive that outgoing packet is got back. Through the self loop detection, you can prevent packet, which comes back because it blocks the port.

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