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Configuring VLAN Stacking Configuring VLAN Stacking Services
OmniSwitch AOS Release 7 Network Configuration Guide June 2013 page 33-15
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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.
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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.
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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 MAC used:
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STP legacy BPDU are supported only when the flat Spanning Tree mode is active on the switch.
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NNI ports can be 802.1q tagged with normal VLANs. The TPID of the packets tagged with the normal
VLAN is 0x8100 (regardless of the TPID of the NNI port). This allows the NNI port to carry both
802.1q tagged traffic and SVLAN tagged traffic.
Configuring a NNI Association with a SVLAN
The ethernet-service svlan nni command is used to associate the NNI with an SVLAN. For example, the
following command associates NNI 2/1 with SVLAN 300:
-> ethernet-service svlan 300 nni port 2/1
When a port is associated with an SVLAN using this command, the port is automatically defined as an
NNI to carry traffic for the specified SVLAN.
To delete an NNI port association with an SVLAN, use the no form of the ethernet-service svlan nni
command. For example, the following command deletes the NNI 2/1 and SVLAN 300 association:
-> no ethernet-service svlan 300 nni port 2/1
Use the show ethernet-service nni command to display the NNI port configuration for the switch.
Configuring a VLAN Stacking Service Access Point
The ethernet-service sap 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:
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User Network Interface (UNI) ports . See “Configuring VLAN Stacking User Ports” on page 33-17 .
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Customer VLANs (CVLANs). See “Configuring the Type of Customer Traffic to Tunnel” on
page 33-17 .
STP
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}
Provider MAC address {0x01, 0x80, 0xc2, 0x00, 0x00, 0x0D}