Enabling Layer 2 Protocol TunnelingTo enable Layer 2 protocol tunneling, use the following command.1. Verify that the system is running the default CAM profile. Use this CAM profile for L2PT.EXEC Privilege modeshow cam-profile2. Enable protocol tunneling globally on the system.CONFIGURATION modeprotocol-tunnel enable3. Tunnel BPDUs the VLAN.INTERFACE VLAN modeprotocol-tunnel stpSpecifying a Destination MAC Address for BPDUsBy default, Dell Networking OS uses a Dell Networking-unique MAC address for tunneling BPDUs. Youcan configure another value.To specify a destination MAC address for BPDUs, use the following command.• Overwrite the BPDU with a user-specified destination MAC address when BPDUs are tunneled acrossthe provider network.CONFIGURATION modeprotocol-tunnel destination-macThe default is 01:01:e8:00:00:00Setting Rate-Limit BPDUsCAM space is allocated in sections called field processor (FP) blocks.There are a total of 13 user-configurable FP blocks. The default number of blocks for L2PT is 0; you mustallocate at least one to enable BPDU rate-limiting.To set the rate-lime BPDUs, use the following commands.1. Create at least one FP group for L2PT.CONFIGURATION modecam-acl l2aclFor details about this command, refer to CAM Allocation.2. Save the running-config to the startup-config.EXEC Privilege modecopy running-config startup-config3. Reload the system.EXEC Privilege modereloadService Provider Bridging 827
