Alcatel-Lucent 6850-48 Network Guide

Configuring VLAN Stacking

Configuring VLAN Stacking Services

OmniSwitch AOS Release 6 Network Configuration Guide

page 9-15

The following command example configures the vendor TPID for NNI port 2/1 to 0x88a8 and enables 
support for Spanning Tree legacy BPDU:

-> ethernet-service nni 2/1 tpid 88a8 stp legacy-bpdu enable

Consider the following when configuring NNI port parameter values:

• A mismatch of TPID values on NNI ports that are connected together is not supported; VLAN Stack-

ing will not work between switches using different NNI TPID values.

• Enable legacy BPDU support only on VLAN Stacking network ports that are connected to legacy 

BPDU switches. Enabling legacy BPDU between AOS switches may cause flooding or an unstable 
network.

• If legacy BPDU is enabled on a network port while at same time BPDU flooding is enabled on user 

ports, make sure that tagged customer BPDUs are not interpreted by intermediate switches in the 
provider network.

• If the peer switch connected to the VLAN Stacking network port supports the Provider MAC address 

(i.e., STP, 802.1ad/D6.0 MAC), then enabling legacy BPDU support is not required on the network 
port. Refer to the following table to determine the type of STP or GVRP MAC used: 

• GVRP legacy BPDU are supported only on network ports that already have GVRP enabled for the 

port. 

• STP legacy BPDU are supported only when the flat Spanning Tree mode is active on the switch.

Use the 

 command to display the NNI port configuration for the switch.

 command is used to configure a VLAN Stacking service access point (SAP). An 

SAP is assigned an ID number at the time it is configured. This ID number is then associated with the 
following VLAN Stacking components:

• User Network Interface (UNI) ports. See 

.

• Customer VLANs (CVLANs). See 

.

• SAP profile. Each SAP is associated with a single profile. This profile contains attributes that are used 

to define traffic engineering parameters applied to traffic ingressing on UNI ports that are associated 
with the SAP. See 

.

Customer MAC

{0x01, 0x80, 0xc2, 0x00, 0x00, 0x00}

Provider MAC address (802.1ad/D6.0)

{0x01, 0x80, 0xc2, 0x00, 0x00, 0x08}

Provider MAC address (Legacy MAC)

{0x01, 0x80, 0xc2, 0x00, 0x00, 0x00}

Customer MAC address

{0x01, 0x80, 0xc2, 0x00, 0x00, 0x21}

Provider MAC address

{0x01, 0x80, 0xc2, 0x00, 0x00, 0x0D}