Spanning tree - Revision history

Heth: /* Electing Root-port */

2024-08-07T05:32:05Z

‎Electing Root-port

2024-08-07T05:31:47Z

‎Port roles

2024-08-07T05:29:38Z

‎Port roles

2024-08-07T05:25:46Z

‎BPDU Path Cost

2024-08-07T05:24:51Z

‎BPDU Path Cost

2018-09-04T08:38:42Z

‎Enhancements to the Spanning Tree Protocol

2017-11-20T07:53:23Z

‎Enhancements to the Spanning Tree Protocol

2017-11-20T07:53:12Z

‎Enhancements to the Spanning Tree Protocol

2013-08-13T12:12:44Z

‎Instability in Switch MAC-Address table

2013-08-13T12:10:59Z

‎Instability in Switch MAC-Address table

@@ Line 209: / Line 209: @@
 #When multiple links are associated to the same switch, the lowest port priority from the advertising switch is preferred.
 #When multiple links are associated to the same switch, the lower port number from the advertising switch is preferred.
 {{:Cisco STP Toolkit}}

@@ Line 203: / Line 203: @@
 |-
 |}
 {{:Cisco STP Toolkit}}
 <span id="mstp"></span>
 == Electing Root-port ==
 #The interface associated to lowest path cost is more preferred.

← Older revision		Revision as of 05:29, 7 August 2024
Line 206:		Line 206:

	<span id="mstp"></span>		<span id="mstp"></span>
		+	== Electing Root-port ==
		+	#The interface associated to lowest path cost is more preferred.
		+	#The interface associated to the lowest system priority of the advertising switch is preferred next.
		+	#The interface associated to the lowest system MAC address of the advertising switch is preferred next.
		+	#When multiple links are associated to the same switch, the lowest port priority from the advertising switch is preferred.
		+	#When multiple links are associated to the same switch, the lower port number from the advertising switch is preferred.

	=MST: Multiple Spanning Tree protocol=		=MST: Multiple Spanning Tree protocol=

@@ Line 130: / Line 130: @@
 |}
 === BPDU Path Cost ===
 {|border=1 ;style="margin: 0 auto; text-align: center;cellpadding="5" cellspacing="0"
 |+ STP Path cost

@@ Line 133: / Line 133: @@
 |+ STP Path cost
 |- bgcolor=lightgrey
-! Link Bandwidth !! Old STP Cost !! New STP Cost
+! Link Bandwidth !! Short mode STP Cost !! Long mode STP Cost
 |-
-| 4 Mbps || 250 || 250
+| 10 Mbps || 100 || 2.000.000
 |-
-| 10 Mbps || 100 || 100
+|100 Mbps || 19 || 200.000
 |-
-|16 Mbps || 63 || 62
+| 1 Gbps || 4 || 20.000
 |-
-| 45 Mbps || 22 || 39
+| 10 Gbps || 2 || 2.000
 |-
-| 100 Mbps || 10 || 19
+| 20 Gbps || 1 || 1.000
 |-
-| 622 Mbps || 2 || 6
+| 100 Gbps || 1 || 200
 |-
-| 1 Gbps || 1 || 4
+| 1 Tbps || 1 || 20
 |-
-| 10 Gbps || 0 || 2
+| 10 Tbps || 1 || 2
 |}
 == STP Port States ==
 {|

@@ Line 184: / Line 184: @@
 *[[#Spanning Tree:mstp|Multiple Spanning Tree Protocol]] (MSTP)
 *[[Per VLAN Rapid Spanning Tree]] (PVRST)
 {{:Cisco STP Toolkit}}

@@ Line 178: / Line 178: @@
 = Enhancements to the Spanning Tree Protocol =
-[[Image:STP toolkit.png|300px|Right|STP Toolkit]]
+[[Image:STP toolkit.png|thumb|300px|Right|STP Toolkit]]
 *[[Spanning Tree protocol history]]
 *[[Per VLAN Spanning Tree Protocol]] (PVST+)

@@ Line 20: / Line 20: @@
 *PC-B's MAC-address is unknown to Switch Y which send the Frame out of all ports. (Except originating port)
 *Switch X now receives Frames on port 1 and port 2 with source MAC-address of PC-A
-*Switch X now thinks that PC-A is on Port 1, Port 2 and Port 3.
+*Switch X now thinks that PC-A is on Port 1, Port 2 or Port 3 depending on the port the last frame was received.
 [[Image:stp3.png|500px|none|thumb|Broadcast storm example]]

@@ Line 18: / Line 18: @@
 *PC-B's MAC-address is unknown to Switch X which send the Frame out of all ports. (Except the originating port 3)
 *Switch Y receives the Frame to PC-B on port 1 and on port 2.
-*PC-B's MAC-address is unknown to Switch X which send the Frame out of all ports. (Except originating port)
+*PC-B's MAC-address is unknown to Switch Y which send the Frame out of all ports. (Except originating port)
 *Switch X now receives Frames on port 1 and port 2 with source MAC-address of PC-A
 *Switch X now thinks that PC-A is on Port 1, Port 2 and Port 3.