Reference Guide
Service Provider Bridging | 1393
Command
History
protocol-tunnel 
c e s
Enable protocol tunneling on a stacked (Q-in-Q) VLAN for specified protocol 
packets.
Syntax
protocol-tunnel {dot1x | e-lmi | gmrp | gvrp | lldp | lacp | mmrp | mvrp | oam | stp} 
To disable protocol tunneling for a Layer 2 protocol, use the no protocol-tunnel 
command.
Parameters
Defaults
No default values or behavior
Command Modes
CONF-IF-VLAN
Command
History
Version 8.3.19.0 Introduced on S4820T
Version 8.5.1.0 Added support for 4-port 40G line cards on ExaScale.
Version 8.3.7.0 Introduced on S4810 
Version 8.2.1.0 Introduced on the C-Series, E-Series and E-Series ExaScale.
Version 7.4.1.0 Introduced
dot1x
E-Series ExaScale only: Enter dot1x to enable protocol tunneling for 802.1x 
authentication.
e-lmi
E-Series ExaScale only: Enter e-lmi to enable protocol tunneling for the Ethernet local 
management interface (E-LMI). 
gmrp
E-Series ExaScale only: Enter gmrp to enable protocol tunneling for the GARP 
Multicast Registration protocol (GMRP).
gvrp
E-Series ExaScale only: Enter gvrp to enable protocol tunneling for the GARP VLAN 
Registration protocol (GVRP).
lldp
E-Series ExaScale only: Enter lldp to enable protocol tunneling for the Link Layer 
Discovery protocol (LLDP).
lacp
E-Series ExaScale only: Enter lacp to enable protocol tunneling for the Link 
Aggregation Control protocol (LACP).
mmrp
E-Series ExaScale only: Enter mmrp to enable protocol tunneling for the Multiple MAC 
Registration protocol (MMRP).
mvrp
E-Series ExaScale only: Enter mvrp to enable protocol tunneling for the Multiple 
VLAN Registration protocol (MVRP).
oam
E-Series ExaScale only: Enter oam to enable protocol tunneling for Link-Layer 
Ethernet Operations, Administration, and Maintenance functions (Ethernet in the First 
Mile - EFM - OAM 802.3ah).
stp
Enter stp to enable protocol tunneling on a spanning tree, including STP, MSTP, RSTP, 
and PVST.
Version 8.5.1.1 Support for 802.1X, E-LMI, GMRP, GVRP, LLDP, LACP, MMRP, MVRP, and 
OAM 802.3ah protocol traffic was added to the E-Series ExaScale.










