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Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view or
port group view.
• Enter Layer 2 Ethernet interface view
or Layer 2 aggregate interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual port-group-name
Use either command.
3. Enable No Agreement
Check.
stp no-agreement-check
Disabled by default.
No Agreement Check configuration example
Network requirements
As shown in Figure 22:
• Device A connects to a third-party device that has a different spanning tree implementation.
Both devices are in the same region.
• The third-party device (Device B) is the regional root bridge, and Device A is the downstream
device.
Figure 22 Network diagram
Configuration procedure
# Enable No Agreement Check on Ethernet 1/0/1 of Device A.
<DeviceA> system-view
[DeviceA] interface ethernet 1/0/1
[DeviceA-Ethernet1/0/1] stp no-agreement-check
Configuring TC snooping
Figure 23 shows a topology change (TC) snooping application scenario. Device does not have the
spanning tree feature enabled. Device connects to two user networks, in which all devices are
enabled with the spanning tree feature. The user networks are dual-uplinked to Device for high
availability. Device transparently transmits BPDUs in every user network.
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