R21xx-HP FlexFabric 11900 Layer 2 LAN Switching Configuration Guide

You can enable the No Agreement Check feature on the downstream device's port to enable the

designated port of the upstream device to transit its state rapidly.

Configuration prerequisites

Before you configure the No Agreement Check function, complete the following tasks:

• Connect a device to a third-party upstream device that supports spanning tree protocols through a

point-to-point link.

• Configure the same region name, revision level and VLAN-to-instance mappings on the two devices,

assigning them to the same region.

Configuration procedure

Enable the No Agreement Check feature on the root port.

To configure No Agreement Check:

Step Command Remarks

1. Enter system view.

system-view N/A

2. Enter Layer 2 Ethernet or

aggregate interface view.

interface interface-type interface-number N/A

3. Enable No Agreement

Check.

stp no-agreement-check

By default, No Agreement

Check is disabled.

No Agreement Check configuration example

Network requirements

As shown in Figure 20:

• 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 20 Network diagram

Configuration procedure

# Enable No Agreement Check on Ten-GigabitEthernet 1/0/1 of Device A.

<DeviceA> system-view

[DeviceA] interface ten-gigabitethernet 1/0/1

[DeviceA-Ten-GigabitEthernet1/0/1] stp no-agreement-check

XGE1/0/1

Device A Device B

XGE1/0/1

Root port Designated port

Root bridge