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 profile. Use this CAM profile 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, the Dell Networking OS uses a Dell Networking-unique MAC address for tunneling BPDUs.
You can 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 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 field processor (FP) blocks.
There are a total of 13 user-configurable 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-config to the startup-config.
EXEC Privilege mode
copy running-config startup-config
840 Service Provider Bridging