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Changing Precedence for Spanning Tree BPDU Packets

Spanning tree BPDU packets are automatically set to a high precedence. The queue number on these packets is set to 3. On M-series routers (except the M320) by default, a queue value of 3 indicates high precedence. To enable this higher precedence on BPDU packets, an instance-specific BPDU precedence filter named default_bpdu_filter is automatically attached to the VPLS DMAC table. This filter places a high precedence on all packets sent to 01:80:c2:00:00:00/24.

You can overwrite this filter by configuring a VPLS FTF filter and applying it to the VPLS routing instance. For more information, see Configuring VPLS FTFs and Applying a VPLS Filter to a VPLS Routing Instance.

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