Enabling Layer 2 Gateway Stp On A Switch - Cisco Nexus 9000 Series Configuration Manual

Enabling Layer 2 Gateway STP on a Switch

• ESI interfaces should not be enabled in spanning-tree edge mode to allow Layer 2 Gateway STP to run
• You can continue to use ESIs or orphans (single-homed hosts) in spanning-tree edge mode if they directly
• Configure all VTEPs that are connected by a common customer access layer in the same Layer 2 Gateway
• The Layer 2 Gateway STP domain scope is global, and all ESIs on a given VTEP can participate in only
• Mappings between Multiple Spanning Tree (MST) instances and VLANs must be consistent across the
• Non-Layer 2 Gateway STP enabled VTEPs cannot be directly connected to Layer 2 Gateway STP-enabled
• Keep the current edge and the BPDU filter configurations on both the Cisco Nexus switches and the
• Enable Layer 2 Gateway STP on all the switches with a recommended priority and the mst instance
• Remove the BPDU filter configurations on the switch side first.
• Remove the BPDU filter configurations and the edge on the customer access switch.
Enabling Layer 2 Gateway STP on a Switch
Complete the following steps to enable Layer 2 Gateway STP on a switch.
Procedure
Step 1
Step 2
Step 3
Step 4
Step 5
Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, Release 7.x
108
across the VTEP and access layer.
connect to hosts or servers that do not run Spanning Tree Protocol and are end hosts.
STP domain. Ideally, all VTEPs on the fabric on which the hosts reside and to which the hosts can move.
one domain.
VTEPs in a given Layer 2 Gateway STP domain.
VTEPs. Performing this action results in conflicts and disputes because the non-Layer 2 Gateway STP
VTEP keeps sending BPDUs and it can steer the root outside.
access switches after upgrading to the latest build.
mapping as needed. Use the commands spanning-tree domain enable and spanning-tree mst
<instance-id's> priority 8192.
Now the topology converges with Layer 2 Gateway STP and any blocking of the redundant connections
is pushed to the access switch layer.
Command or Action
spanning-tree mode <rapid-pvst,
mst>
spanning-tree domain enable
spanning-tree domain 1
spanning-tree mst <id> priority 8192
spanning-tree vlan <id> priority
8192
Configuring VXLAN EVPN Multihoming
Purpose
Enables Spanning Tree Protocol mode.
Enables Layer 2 Gateway STP on a switch. It disables
Layer 2 Gateway STP on all EVPN ESI multihoming
VLANs.
Explicit domain ID is needed to tunnel encoded
BPDUs to the core and processes received from the
core.
Configures Spanning Tree Protocol priority.
Configures Spanning Tree Protocol priority.