Dell Command Line Reference Guide for the S4048–ON System


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 EMC Networking OS Configuration Guide Service Provider Bridging section.

This section includes command line information (CLI) for the Dell EMC Networking OS Layer 2 Protocol Tunneling (L2PT). L2PT enables protocols to tunnel through an 802.1q tunnel.

Dell EMC Networking OS supports L2PT on Dell EMC 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 configured 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 first [OSPF]) work as expected and carry over to the other end of the VLAN-Stack VLAN.

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