OME-M 1.20.00 and OS10.5.0.7 and later supports a new uplink type: Ethernet - No Spanning Tree. This uplink type allows Ethernet uplinks to represent a SmartFabric as an end host with multiple adapters to the upstream network with spanning tree being disabled on the uplink interfaces.
A loop free topology without STP is achieved by not allowing overlapping VLANs across uplinks. Supported use cases are shown in the following figures.
Supported scenarios:
The Ethernet - No Spanning Tree feature supports uplinks to both Dell and non-Dell switches in a vPC/VLT. Each uplink must be in a single LACP LAG.
Guidelines:
- On an existing SmartFabric, all legacy Ethernet uplinks must be deleted before creating Ethernet - No Spanning Tree uplinks to avoid the possibility of creating a network loop.
- Ethernet-No Spanning Tree uplinks cannot co-exist with legacy Ethernet uplinks in the same SmartFabric.
- VLAN IDs (tagged/untagged) must not overlap.
- FCoE Uplinks require separate untagged VLAN IDs.
- With OME-M 1.20.00, only QSFP28 interfaces on the MX9116n FSE are supported for Ethernet - No Spanning Tree uplinks. With OME-M 1.20.10 and later, QSFP28-DD interfaces for Ethernet - No Spanning Tree are also supported.
Use Case 1: Standard uplink configuration (maximum of 2 uplinks)
Use Case 2: Uplink with FC gateway
Use Case 3: Uplink with direct attached FC
Use Case 4: Ethernet - No Spanning Tree uplink with FCoE FSB
Configuring Ethernet - No Spanning Tree uplinks
Creating an Ethernet – No Spanning Tree uplink is the same process as the legacy Ethernet uplink except the upstream switch configuration is different. Configuration examples for upstream switches can be found in this guide under Configuration Scenarios. Instructions for how to create an uplink are included in this guide under Create Ethernet – No Spanning Tree uplink.