CommScope RUCKUS Community Forums

jay01 · ‎10-29-2023

Hi,

I have an ICX edge switch connected to Core using 802.1w. I need to uplink another extreme switch to the existing ICX edge switch.
Vlan 900 is configured on the extreme switch this vlan has configured with spanning-tree 802.1w and stp for point to point link to core on the ICX switch.Currently when RSTP enabled on extreme switch I am getting BPDU Errors:-

STP BPDU Drop messages flooding the logErro:STP.

InBPDU.Drop Port=24 ! STP Port is disabled!

Is there some additional configuration required on iCX switch to stop the BPDU errors ?

Chandini · ‎11-03-2023

Hi Jay

Thank you for reaching. Sorry but I don't have a template but below is a example. I hope this helps.

Topology :

Core Switch p2p connection (1/1/1) -> p2p connection (1/1/1) Access Switch (1/1/2) -> end device
Consider both switches have vlan 1 , vlan 2 and vlan 3
1/1/2 is end device part of vlan 3 only

If above scenario is considered below would be the configuration:

For core switch:

Vlan configuration:

Device(config)#vlan 1 2 3
Device(config-mvlan-1-3)#spanning-tree 802-1w
Device(config-mvlan-1-3)# spanning-tree 802-1w priority 4096 // note this priority you can consider based on your network topology
Device(config)#vlan 2 3
Device(config-mvlan-2-3)#tagged e 1/1/1

Port configuration:

Device(config)#int e 1/1/1
Device(config-if-e1000-1/1/1)#spanning-tree 802-1w admin-pt2pt-mac

For access switch:

Access(config)#vlan 1 2 3
Access(config-mvlan-1-3)#spanning-tree 802-1w
Access(config)#vlan 2 3
Access(config-mvlan-2-3)#tagged e 1/1/1
Access(config)#vlan 3
Access(config-vlan-3)# untagged e 1/1/2

Port configuration:

Access(config)#int e 1/1/1
Access(config-if-e1000-1/1/1)#spanning-tree 802-1w admin-pt2pt-mac
Access(config)#int e 1/1/2
Access(config-if-e1000-1/1/2)#spanning-tree 802-1w admin-edge-port

I hope the above details help you

Thanks

View solution in original post

Chandini · ‎10-30-2023

Hi Jay

Thank you for reaching us

Could you please help us with ICX switch model and firmware running on the switch ?
Also port 24 is it connected to uplink or end device ?
Is the BPDU drop message only received on port 24 when we check "show logging" from the switch CLI or are there other ports also that receive the same message in the switch logs ?

Also please check if this messages are causing high CPU on the switch by running "show CPU"

Thanks

jay01 · ‎10-30-2023

Hi Chandini,

Could you please help us with ICX switch model and firmware running on the switch ?

ICX6450-48-HPOE/ICX64S08030h SW: Version 08.0.30hT311

Also port 24 is it connected to uplink or end device ?

Port 3/1/27 on ICX switch is uplinked to Extreme Switch port 24

Is the BPDU drop message only received on port 24 when we check "show logging" from the switch CLI or are there other ports also that receive the same message in the switch logs ?

only port 24 on Extreme Switch get the STP BPDU Drop messages

Can you confirm what spanning tree config is required on ICX Edge switch that is uplinked to another Edge Switch ?

CORE(802.1w 4076)--->ICX-EdgeSwitch (802.1w 32768)----Extreme EdgeSwitch(802.1w 32768)

Chandini · ‎10-31-2023

Hi Jay

Thanks for reverting.

Below are the configuration details for RSTP which you can change or configure based on your network setup and requirement.

Below are the commands used:

Enable RSTP:
Device(config-vlan-2)# spanning-tree 802-1w

For defining priorities:
Device(config-vlan-2)# spanning-tree 802-1w priority 4096

Define port parameters/function:

End device connection:
Device(config-vlan-2)# spanning-tree 802-1w e 1/1/4 admin-edge-port

Switch to switch link:
Device(config-vlan-2)# spanning-tree 802-1w e 1/1/1 admin-pt2pt-mac

Please run through the below link reference which will help you understand more about the protocol and working with Ruckus devices.

Configuring RSTP:

https://docs.commscope.com/bundle/fastiron-08095-l2guide/page/GUID-A7C9E7F9-8349-4B09-82D5-A4AA81723...

Displaying information about 802-1w:

https://docs.commscope.com/bundle/fastiron-08095-l2guide/page/GUID-54C6B84D-FC89-4C0E-BE2B-EEA706706...

All about 802.1W Rapid Spanning Tree (RSTP):

https://docs.commscope.com/bundle/fastiron-08095-l2guide/page/GUID-4061461B-3CBB-477B-B179-0A8611366...

I hope these details help you

Thanks

jay01 · ‎10-31-2023

Hi Chandini,

Thank you for configuration information.

I understand what needs to be configured between Core and Edge switch but I am still unclear what the correct config is connecting Edge to Edge when daisy chaining switches using a lag or just an access port.

Also what the difference between applying the admin-pt2pt-mac on a vlan as opposed to interface ?