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M

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August 29th, 2025 09:38

OS10.6: port-fast?

Hello,

Among other wisdom, the OS10 User Guide for 10.6 says:

Most of the PXE clients do not support switching before a PXE boot. As a result, data loops do not form between the SmartFabric OS10 nodes and PXE clients on or before PXE boot process. For such cases, Dell Technologies recommends enabling port-fast on the LACP individual LAG that connects to the PXE client

However, it doesn't say HOW and I can't find the named option on my S5232F-ON running 10.6. I'm being dumb, does anyone know how to turn it on, please? I'm using RSTP.

Cheers,

Mark

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September 1st, 2025 12:14

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September 1st, 2025 13:19

Hi Marco, many thanks for your suggestion.

Unfortunately, that document is for OS 9. If I attempt to do this on OS 10, I don't have an interface "spanning-tree portfast" option:

switch# configure terminal
switch(config)# interface ethernet 1/1/10
switch(conf-if-eth1/1/10)# spanning-tree portfast
% Error: Illegal parameter.

switch(conf-if-eth1/1/10)# spanning-tree ?

  bpdufilter  BPDU filter on the interface
  bpduguard   BPDU guard on the interface
  disable     Disable stp on the interface
  guard       Guard type Loop or Root or None
  link-type   Detemine link type based on media duplex of this interface
  msti        Spanning Tree Subsystem
  port        Set port type
  rapid-pvst  Spanning Tree Rapid-pvst Subsystem
  rstp        Set rstp parameters for interface
  vlan        Select vlan range option

Any ideas, please?

Thanks,

Mark

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September 1st, 2025 17:04

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September 2nd, 2025 08:25

Bingo, thanks Marco - that document tells me that `spanning-tree port type edge` on OS10 achieves the equivalent job of `spanning-tree portfast` on OS9.

Could the OS10 documentation be updated, please? Pages 558, 563 and 567 in Dell SmartFabric OS10 User Guide Release 10.6.0 all refer to enabling port-fast, when presumably they should be recommending changing the port type to edge.

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