Chapter 8 Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling on the ML-Series Card

Configuring IEEE 802.1Q Tunneling

Configuring IEEE 802.1Q Tunneling

This section includes the following information about configuring IEEE 802.1Q tunneling:

•IEEE 802.1Q Tunneling and Compatibility with Other Features, page 8-4

•Configuring an IEEE 802.1Q Tunneling Port, page 8-4

•IEEE 802.1Q Example, page 8-5

Note By default, IEEE 802.1Q tunneling is not configured on the ML-Series.

IEEE 802.1Q Tunneling and Compatibility with Other Features

Although IEEE 802.1Q tunneling works well for Layer 2 packet switching, there are incompatibilities with some Layer 2 features and with Layer 3 switching:

•A tunnel port cannot be a routed port.

•Tunnel ports do not support IP access control lists (ACLs).

•Layer 3 quality of service (QoS) ACLs and other QoS features related to Layer 3 information are not supported on tunnel ports. MAC-based QoS is supported on tunnel ports.

•EtherChannel port groups are compatible with tunnel ports as long as the IEEE 802.1Q configuration is consistent within an EtherChannel port group.

•Port Aggregation Protocol (PAgP) and Unidirectional Link Detection (UDLD) Protocol are not supported on IEEE 802.1Q tunnel ports.

•Dynamic Trunking Protocol (DTP) is not compatible with IEEE 802.1Q tunneling because you must manually configure asymmetric links with tunnel ports and trunk ports.

•Loopback detection is supported on IEEE 802.1Q tunnel ports.

•When a port is configured as an IEEE 802.1Q tunnel port, spanning tree bridge protocol data unit (BPDU) filtering is automatically disabled on the interface.

Configuring an IEEE 802.1Q Tunneling Port

Beginning in privileged EXEC mode, follow these steps to configure a port as an IEEE 802.1Q tunnel port:

 

Command

Purpose

Step 1

 

 

ML_Series# configure terminal

Enters global configuration mode.

Step 2

 

 

ML_Series(config)# bridge

Creates a bridge number and specifies a protocol.

 

bridge-number protocol bridge-protocol

 

Step 3

 

 

ML_Series(config)# interface

Enters the interface configuration mode and the interface to be

 

fastethernet number

configured as a tunnel port. This should be the edge port in the

 

 

service-provider network that connects to the customer switch. Valid

 

 

interfaces include physical interfaces and port-channel logical

 

 

interfaces.

 

 

 

Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5

8-4

78-18133-01

 

 

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Cisco Systems 15310-MA Configuring Ieee 802.1Q Tunneling, Ieee 802.1Q Tunneling and Compatibility with Other Features
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15310-CL, 15310-MA specifications

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