Administrator Guide
Service Provider Bridging
Service provider bridging is composed of virtual local area network (VLAN) Stacking, Layer 2 Protocol Tunneling, and Provider Backbone
Bridging as described in the Dell Networking OS Conguration Guide Service Provider Bridging section.
This section includes command line information (CLI) for the Dell Networking OS Layer 2 Protocol Tunneling (L2PT). L2PT enables
protocols to tunnel through an 802.1q tunnel.
Dell Networking OS supports L2PT on Dell Networking OS.
For more information, see VLAN Stacking, Spanning Tree Protocol (STP), and GARP VLAN Registration (GVRP).
Important Points to Remember
• L2PT is enabled at the interface VLAN-Stack VLAN level. For more information about Stackable VLAN (VLAN-Stacking) commands,
see VLAN Stacking.
• The default behavior is to disable protocol packet tunneling through the 802.1q tunnel.
• Rate-limiting is required to protect against bridge protocol data units (BPDU) attacks.
• A port channel (including through link aggregation control protocol [LACP]) can be congured as a VLAN-Stack access or trunk port.
• Address resolution protocol (ARP) packets work as expected across the tunnel.
• Far-end failure detection (FEFD) works the same as with Layer 2 links.
• Protocols that use Multicast MAC addresses (for example, open shortest path rst [OSPF]) work as expected and carry over to the
other end of the VLAN-Stack VLAN.
Topics:
• debug protocol-tunnel
• protocol-tunnel
• protocol-tunnel destination-mac
• protocol-tunnel enable
• protocol-tunnel rate-limit
• show protocol-tunnel
debug protocol-tunnel
Enable debugging to ensure incoming packets are received and rewritten to a new MAC address.
Syntax
debug protocol-tunnel interface {in | out | both} [vlan vlan-id] [count value]
To disable debugging, use the no debug protocol-tunnel interface {in | out | both} [vlan
vlan-id] [count value] command.
Parameters
interface Enter one of the following interfaces and the interface information:
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