Dell Force10 S50-01-GE-48T FTOS 8.4.2.7 Command Line Reference Guide for E-Ser - Page 1337

52 Service Provider Bridging Overview Service Provider Bridging is composed of VLAN Stacking, Layer 2 Protocol Tunneling, and Provider Backbone Bridging as described in the FTOS Configuration Guide Service Provider Bridging chapter. This chapter includes CLI information for FTOS Layer 2 Protocol Tunneling (L2PT). L2PT enables protocols to tunnel through an 802.1q tunnel. L2PT is available in FTOS for the C-Series c, E-Series e, and S-Series s. L2PT is supported on E-Series ExaScale ex with FTOS 8.2.1.0. and later. Refer to Chapter 61, VLAN Stacking or Chapter 58, Spanning Tree Protocol (STP) and Chapter 20, GARP VLAN Registration (GVRP) for further information related to those features. Commands The L2PT commands are: • debug protocol-tunnel • protocol-tunnel • protocol-tunnel destination-mac • protocol-tunnel enable • protocol-tunnel rate-limit • show protocol-tunnel Important Points to Remember • L2PT is enabled at the interface VLAN-Stack VLAN level. For details on Stackable VLAN (VLAN-Stacking) commands, see Chapter 61, VLAN Stacking. • The default behavior is to disable protocol packet tunneling through the 802.1q tunnel. • Rate-limiting is required to protect against BPDU attacks. • A port channel (including through LACP) can be configured as a VLAN-Stack access or trunk port. • ARP packets work as expected across the tunnel. • FEFD works the same as with Layer 2 links. • Protocols that use Multicast MAC addresses (OSPF for example) work as expected and carry over to the other end of the VLAN-Stack VLAN. Service Provider Bridging | 1337