• vman-qos-dual-fp: mark the S-Tag dot1p and queue the frame according to the S-Tag dot1p. This method requires twice asmany CAM entries as vman-qos and FP blocks in multiples of 2.The default is: 0 FP blocks for vman-qos and vman-qos-dual-fp.2 The new CAM configuration is stored in NVRAM and takes effect only after a save and reload.EXEC Privilege modecopy running-config startup-config3 Reload the system.reload4 Map C-Tag dot1p values to a S-Tag dot1p value.INTERFACE modevlan-stack dot1p-mapping c-tag-dot1p values sp-tag-dot1p valueSeparate C-Tag values by commas. Dashed ranges are permitted.Dynamic Mode CoS overrides any Layer 2 QoS configuration in case of conflicts.NOTE: Because dot1p-mapping marksand queues packets, the only remaining applicable QoS configuration is rate metering.You may use Rate Shaping or Rate Policing.Layer 2 Protocol TunnelingSpanning tree bridge protocol data units (BPDUs) use a reserved destination MAC address called the bridge group address, which is 01-80-C2-00-00-00.Only spanning-tree bridges on the local area network (LAN) recognize this address and process the BPDU. When you use VLAN stackingto connect physically separate regions of a network, BPDUs attempting to traverse the intermediate network might be consumed and laterdropped because the intermediate network itself might be using spanning tree (shown in the following illustration).Service Provider Bridging 807
