R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

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To configure No Agreement Check:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface or port
group view.
• Enter 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 one of the commands.
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 23:
• Router A connects to a third-party device Router B that has a different spanning tree implementation.
Both routers are in the same region.
• The third-party device (Router B) is the regional root bridge, and Router A is the downstream device.
Figure 23 Network diagram
Configuration procedure
# Enable No Agreement Check on GigabitEthernet 4/0/1 of Router A.
<RouterA> system-view
[RouterA] interface GigabitEthernet 4/0/1
[RouterA-GigabitEthernet4/0/1] stp no-agreement-check
Configuring TC snooping
IMPORTANT:
This feature is supported only on the HSR6802/ HSR6804/ HSR6808 routers that have SAP-4EXP cards.
Figure 24 shows a topology change (TC) snooping application scenario. Device A and Device B form an
IRF fabric and do not have the spanning tree feature enabled. The IRF fabric connects to two user
networks, in which all devices are enabled with the spanning tree feature. The user networks are
dual-uplinked to the IRF fabric for high availability. The IRF fabric transparently transmits BPDUs in every
user network.