stp tc-notify bridge-domain

Function

The stp tc-notify bridge-domain command enables topology change (TC) notification on a main interface. After receiving an STP TC-BPDU, the main interface instructs the VSI bound to the bridge domain to update ARP and MAC entries.

The undo stp tc-notify bridge-domain command disables topology change (TC) notification on a main interface.

By default, an interface does not instruct its BD-bound VSI to update ARP and MAC entries after receive STP TC BPDUs.

Format

stp tc-notify bridge-domain

undo stp tc-notify bridge-domain

Parameters

None

Views

Layer 2 100GE interface view, Layer 2 10GE interface view, 25GE-L2 view, 400GE-L2 view, Layer 2 40GE interface view, Layer 2 50GE interface view, Layer 2 Eth-Trunk interface view, Layer 2 GE interface view, Interface group view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mstp	write

Usage Guidelines

Usage Scenario

Generally, if the topology of an Ethernet ring connected to an EVPN changes and the device interface enabled with STP TC BPDU snooping snoops STP TC BPDUs, the spanning tree is recalculated, causing all devices on the ring to update ARP and MAC entries. However, the BD-VSI cannot be instructed to update ARP and MAC entries. To address this issue, run the command on the interface to enable the interface to instruct its BD-bound VSI to update ARP and MAC entries after the interface snoops STP TC BPDUs.

Prerequisites

The stp enable command has been run.

Example

# Enable GE 0/1/1 to instruct its BD-bound VSI to update ARP and MAC entries after the interface snoops STP TC BPDUs.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/1
[~HUAWEI-GigabitEthernet0/1/1] stp enable
[*HUAWEI-GigabitEthernet0/1/1] stp tc-notify bridge-domain