Enable Tunneling on a Port

When enabling tunneling on a port, you must ensure that the following prerequisites are met:

Bridge mode must be set to provider for dot1q-tunneling status to be enabled on an interface.
Before configuring the bridge mode, spanning tree and GARP must be shut down.

Disable GVRP and GMRP, and shut down GARP spanning tree.

SEFOS(config)# set gvrp disable
SEFOS(config)# set gmrp disable
SEFOS(config)# shutdown garp
SEFOS(config)# no spanning-tree
SEFOS(config)# shutdown spanning-tree
SEFOS(config)# shutdown dot1x
SEFOS(config)# shutdown port-channel
SEFOS(config)# shutdown lldp
SEFOS(config)# no interface vlan 1

Configure the bridge mode of the switch.
```
SEFOS(config)# bridge-mode provider
```

Enable GARP and spanning tree, and review the VLAN device details.

SEFOS(config)# set no shutdown garp
SEFOS(config)# set gvrp enable
SEFOS(config)# set gmrp enable
SEFOS(config)# spanning-tree mode mst
SEFOS# show vlan device info 
VLAN device configurations
---------------------------
VLAN Status                       : Enabled
VLAN Oper status                  : Enabled
Gvrp status                       : Enabled
Gmrp status                       : Enabled
Gvrp Oper status                  : Enabled
Gmrp Oper status                  : Enabled
Mac-VLAN Status                   : Disabled
Protocol-VLAN Status              : Enabled
Bridge Mode                       : Provider Bridge
Traffic Classes                   : Enabled
VLAN Operational Learning Mode    : IVL
Version number                    : 1
Max VLAN id                       : 4094
Max supported VLANs               : 1024

To enable dot1q-tunneling on a specified port, the acceptable-frame-type must be set to untaggedAndPrioritytagged. The port must be configured in access mode, and GVRP, GMRP, and STP must be disabled on that port.

Disable GVRP on a port.

SEFOS(config)# set port gvrp extreme-ethernet 0/3 disable

Disable GMRP on a port.

SEFOS(config)# set port gmrp extreme-ethernet 0/3 disable
SEFOS(config)# interface extreme-ethernet 0/3

Configure the switch port acceptable-frame-type as untaggedAndPrioritytagged.
```
SEFOS(config)# switchport acceptable-frame-type untaggedAndPrioritytagged
```
Configure the switch port mode to access.
```
SEFOS(config)# switchport mode access
```
Disable STP on a port.
```
SEFOS(config)# spanning-tree disable
```
Enable dot1q-tunneling on a specified interface.
```
SEFOS(config)# switchport mode dotlq-tunnel
```

Review the configuration details.

SEFOS# show vlan port config port extreme-ethernet 0/3
VLAN Port configuration table
-------------------------------
Port Gi0/1
Port VLAN ID                        : 1
Port Acceptable Frame Type          : Admit Only Untagged and Priority tagged
Port Ingress Filtering              : Disabled
Port Mode                           : Access
Port Gvrp Status                    : Disabled
Port Gmrp Status                    : Enabled
Port Gvrp Failed Registrations      : 0
Gvrp last pdu origin                : 00:00:00:00:00:00
Port Restricted VLAN Registration   : Disabled
Port Restricted Group Registration  : Disabled
Mac Based Support                   : Disabled
Port-and-Protocol Based Support     : Enabled
Default Priority                    : 0
Tunnel Status                       : Enabled
Dot1x Protocol Tunnel Status        : Peer
LACP Protocol Tunnel Status         : Peer
Spanning Tree Tunnel Status         : Peer
GVRP Protocol Tunnel Status         : Peer
GMRP Protocol Tunnel Status         : Peer
IGMP Protocol Tunnel Status         : Peer
Filtering Utility Criteria          : Default
Port Protected Status               : Disabled
-------------------------------------------------------

Review the dot1q-tunnel interface output.

SEFOS# show dot1q-tunnel interface extreme-ethernet 0/3
Interface
-------------
Ex0/3

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Enable Tunneling on a Port