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- Spanning Tree Topology Change
- Hp Spanning Tree Best Practices Examples
- Hp Procurve Spanning Tree Best Practices
- Commands like show ap debug spanning-tree and captures at the uplink wired port will provide BPDU information to look at the port status. Aruba650) (config) #show ap debug spanning-tree ap-name 00:0b:86:80:ea:cb stpdev bridge id 8000.000b8680eacc designated root 8000.000b866acc00.
- Select your root bridge (the central most switch in your network). Enter CLI and type 'configure' to enter config mode. Then enter 'spanning-tree' to enable it. That's all you need to do on a switch to get STP up and running.
- The implementation of Multiple Spanning Tree Protocol (MSTP) is based on the IEEE Institute of Electrical and Electronics Engineers. Standard 802.1D-2004 and 802.1Q 802.1Q is an IEEE standard that enables the use of VLANs on an Ethernet network. 802.1Q supports VLAN tagging.
STP (Spanning Tree Protocol) automatically removes layer 2 switching loops by shutting down the redundant links. A redundant link is an additional link between two switches. A redundant link is usually created for backup purposes. Just like every coin has two sides, a redundant link, along with several advantages, has some disadvantages.
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Topology Image
Normal Data Path Flow
Data Path Flow Root Fail
Data Path Flow-Access Trunk Fail
Spanning-Tree mode Rapid-PVST (802.1w) or MST (802.1s) - I will show more about load balancing techniques leveraging each of these technologies in 'Layer 2 Spanning-Tree Best Practices Part-2' Deterministic blocked ports - in this example we know exactly which ports are going to be blocked by STP. All redundant connections to the secondary root bridge will be blocked. Cisco also recommends that you do not exceed STP diameter of seven hops. Ensure that you hard configure your Root and Secondary Root bridges. Ensure that you only allow required VLAN's over the trunks to ensure you are not running unnecessary STP instances.
Features to leverage include:
Access Layer
-portfast
-bdpuguard
-disable DTP
-loopguard
-etherchannel Guard
Distribution Layer
-root and secondary root placement
-root guard
-disable DTP
-etherchannel Guard
Leverage EtherChannel to reduce the number of ports that need to transition from blocking to forwarding state when leveraging multiple links.
EtherChannel Ports
-EtherChannel Guard
Example:
Access Switch
spanning-tree mode rapid-pvst
spanning-tree priority vlan 1-4094 61440
spanning-tree portfast bpduguard default
spanning-tree loopguard default
interface gig x/x
description Link-to-RootBridge
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11
![Hp Spanning Tree Best Practices Hp Spanning Tree Best Practices](https://cf2.ppt-online.org/files2/slide/h/hpBSV8DQ2Tma37RAovH5ztJfWqxn1ugYGPZ0cE/slide-82.jpg)
switchport nonegotiate
interface gig x/x
description Link-to-SecondaryBridge
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11
switchport nonnegotiate
interface gig x/x
description Link-to-Server
switchport mode access
switchport access vlan 10
switchport nonnegotiate
spanning-tree portfast
Distribution Switch
spanning-tree etherchannel guard misconfig
spanning-tree mode rapid-pvst
spanning-tree priority vlan 1-4094 0
spanning-tree portfast bpduguard default
interface gig x/x
description Link-to-AccessSwitch
switchport trunk encapsulation dot1q
switchport mode trunk
Spanning Tree Topology Change
switchport trunk allowed vlan 10,11switchport nonnegotiate
spanning-tree guard root
interface port-channel 1
Hp Spanning Tree Best Practices Examples
description Link-to-SecondaryRootswitchport trunk encapsulation dot1q
switchport mode trunk
Hp Procurve Spanning Tree Best Practices
switchport trunk allowed vlan 10,11,12,13,14
switchport nonegotiate
interface gig x/x
description Link-to-SecondaryRoot-1
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11,12,13,14
switchport nonegotiate
channel-group 1 mode active
interface gig x/x
description Link-to-SecondaryRoot-2
![Spanning Spanning](https://techhub.hpe.com/eginfolib/networking/docs/switches/K-KA-KB/15-18/atmg/content/images/Figure_A-1.png)
- Spanning Tree Topology Change
- Hp Spanning Tree Best Practices Examples
- Hp Procurve Spanning Tree Best Practices
- Commands like show ap debug spanning-tree and captures at the uplink wired port will provide BPDU information to look at the port status. Aruba650) (config) #show ap debug spanning-tree ap-name 00:0b:86:80:ea:cb stpdev bridge id 8000.000b8680eacc designated root 8000.000b866acc00.
- Select your root bridge (the central most switch in your network). Enter CLI and type 'configure' to enter config mode. Then enter 'spanning-tree' to enable it. That's all you need to do on a switch to get STP up and running.
- The implementation of Multiple Spanning Tree Protocol (MSTP) is based on the IEEE Institute of Electrical and Electronics Engineers. Standard 802.1D-2004 and 802.1Q 802.1Q is an IEEE standard that enables the use of VLANs on an Ethernet network. 802.1Q supports VLAN tagging.
STP (Spanning Tree Protocol) automatically removes layer 2 switching loops by shutting down the redundant links. A redundant link is an additional link between two switches. A redundant link is usually created for backup purposes. Just like every coin has two sides, a redundant link, along with several advantages, has some disadvantages.
The topology depicted in the diagrams is used to help demonstrate data flow during failure and to provide discussion around best practices and may not be necessarily be configured as optimal as possible. I will provide examples in a series of blogs that will provide alternate technical solutions that follow best practice guidelines.Topology Image
Normal Data Path Flow
Data Path Flow Root Fail
Data Path Flow-Access Trunk Fail
Spanning-Tree mode Rapid-PVST (802.1w) or MST (802.1s) - I will show more about load balancing techniques leveraging each of these technologies in 'Layer 2 Spanning-Tree Best Practices Part-2' Deterministic blocked ports - in this example we know exactly which ports are going to be blocked by STP. All redundant connections to the secondary root bridge will be blocked. Cisco also recommends that you do not exceed STP diameter of seven hops. Ensure that you hard configure your Root and Secondary Root bridges. Ensure that you only allow required VLAN's over the trunks to ensure you are not running unnecessary STP instances.
Features to leverage include:
Access Layer
-portfast
-bdpuguard
-disable DTP
-loopguard
-etherchannel Guard
Distribution Layer
-root and secondary root placement
-root guard
-disable DTP
-etherchannel Guard
Leverage EtherChannel to reduce the number of ports that need to transition from blocking to forwarding state when leveraging multiple links.
EtherChannel Ports
-EtherChannel Guard
Example:
Access Switch
spanning-tree mode rapid-pvst
spanning-tree priority vlan 1-4094 61440
spanning-tree portfast bpduguard default
spanning-tree loopguard default
interface gig x/x
description Link-to-RootBridge
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11
switchport nonegotiate
interface gig x/x
description Link-to-SecondaryBridge
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11
switchport nonnegotiate
interface gig x/x
description Link-to-Server
switchport mode access
switchport access vlan 10
switchport nonnegotiate
spanning-tree portfast
Distribution Switch
spanning-tree etherchannel guard misconfig
spanning-tree mode rapid-pvst
spanning-tree priority vlan 1-4094 0
spanning-tree portfast bpduguard default
interface gig x/x
description Link-to-AccessSwitch
switchport trunk encapsulation dot1q
switchport mode trunk
Spanning Tree Topology Change
switchport trunk allowed vlan 10,11switchport nonnegotiate
spanning-tree guard root
interface port-channel 1
Hp Spanning Tree Best Practices Examples
description Link-to-SecondaryRootswitchport trunk encapsulation dot1q
switchport mode trunk
Hp Procurve Spanning Tree Best Practices
switchport trunk allowed vlan 10,11,12,13,14
switchport nonegotiate
interface gig x/x
description Link-to-SecondaryRoot-1
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11,12,13,14
switchport nonegotiate
channel-group 1 mode active
interface gig x/x
description Link-to-SecondaryRoot-2
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 10,11,12,13,14
switchport nonegotiate
channel-group 1 mode active
Optional STP Features