Enabling Layer 2 Protocol Tunneling
To enable Layer 2 protocol tunneling, use the following command.
1 Verify that the system is running the default CAM prole. Use this CAM prole for L2PT.
EXEC Privilege mode
show cam-profile
2 Enable protocol tunneling globally on the system.
CONFIGURATION mode
protocol-tunnel enable
3 Tunnel BPDUs the VLAN.
INTERFACE VLAN mode
protocol-tunnel stp
Specifying a Destination MAC Address for BPDUs
By default, Dell Networking OS uses a Dell Networking-unique MAC address for tunneling BPDUs. You can congure another value.
To specify a destination MAC address for BPDUs, use the following command.
• Overwrite the BPDU with a user-specied destination MAC address when BPDUs are tunneled across the provider network.
CONFIGURATION mode
protocol-tunnel destination-mac
The default is 01:01:e8:00:00:00
Setting Rate-Limit BPDUs
CAM space is allocated in sections called eld processor (FP) blocks.
There are a total of 13 user-congurable FP blocks. The default number of blocks for L2PT is 0; you must allocate 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 mode
cam-acl l2acl
For details about this command, refer to CAM Allocation.
2 Save the running-cong to the startup-cong.
EXEC Privilege mode
copy running-config startup-config
3 Reload the system.
EXEC Privilege mode
reload
754
Service Provider Bridging
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