Implementation Information; Enabling Layer 2 Protocol Tunneling; Specifying A Destination Mac Address For Bpdus; Setting Rate-Limit Bpdus - Dell Force10 Z9000 Configuration Manual

Implementation Information

• L2PT is available for STP, RSTP, MSTP, and PVST+ BPDUs.
• No protocol packets are tunneled when you enable VLAN stacking.
• L2PT requires the default CAM profile.

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, 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
2. Save the running-config to the startup-config.
EXEC Privilege mode
copy running-config startup-config
3. Reload the system.
EXEC Privilege mode
reload
678
Service Provider Bridging
CAM Allocation.