Dell Force10 Z9000 FTOS Command Line Reference Guide for the Z9000 System FTOS - Page 1343
Service Provider Bridging, debug protocol-tunnel, Important Points to Remember
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44 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 FTOS Configuration Guide Service Provider Bridging chapter. This chapter includes command line information (CLI) for the Dell Force10 operating software (FTOS) Layer 2 Protocol Tunneling (L2PT). L2PT enables protocols to tunnel through an 802.1q tunnel. L2PT is supported by FTOS on the C-Series, E-Series, S-Series, Z-Series, or S4810 Dell Force10 systems. L2PT is supported on E-Series ExaScale with FTOS 8.2.1.0. and later. For more information, refer to 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 (VLANStacking) commands, refer to 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. debug protocol-tunnel Enable debugging to ensure incoming packets are received and rewritten to a new MAC address. C-Series, E-Series, S-Series, Z-Series, S4810 Syntax Parameters debug protocol-tunnel interface {in | out | both} [vlan vlanid] [count value] To disable debugging, use the no debug protocol-tunnel interface {in | out | both} [vlan vlan-id] [count value] command. interface Enter one of the following interfaces and slot/port information: • For a Fast Ethernet interface, enter the keyword FastEthernet followed by the slot/port information. 1343
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