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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
e
, and S-Series
L2PT is supported on E-Series ExaScale
Refer to
GARP VLAN Registration (GVRP)
Commands
The L2PT commands are:
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Important Points to Remember
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s
.
Chapter 61, VLAN Stacking
debug protocol-tunnel
protocol-tunnel
protocol-tunnel destination-mac
protocol-tunnel enable
protocol-tunnel rate-limit
show protocol-tunnel
L2PT is enabled at the interface VLAN-Stack VLAN level. For details on Stackable VLAN
(VLAN-Stacking) commands, see
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.
e
x with FTOS 8.2.1.0. and later.
or
Chapter 58, Spanning Tree Protocol (STP)
for further information related to those features.
Chapter 61, VLAN
Stacking.
52
c
, E-Series
and
Chapter 20,
Service Provider Bridging | 1337
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