Chapter 9 Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling on the ML-Series Card

Configuring Layer 2 Protocol Tunneling

protocol tunneling for CDP, STP, and VTP at the interface and subinterface level. Multiple STP (MSTP) tunneling support is achieved through subinterface protocol tunneling. The ML-Series cards connected to the customer switch perform the tunneling process.

When the Layer 2 PDUs that entered the inbound ML-Series switch through the tunnel port exit the switch through the trunk port into the service-provider network, the switch overwrites the customer PDU-destination MAC address with a well-known Cisco proprietary multicast address

(01-00-0c-cd-cd-d0). If IEEE 802.1Q tunneling is enabled, packets are also double-tagged; the outer tag is the customer metro tag and the inner tag is the customer VLAN tag. The core switches ignore the inner tags and forward the packet to all trunk ports in the same metro VLAN. The ML-Series switches on the outbound side restore the proper Layer 2 protocol and MAC address information and forward the packets. Therefore, the Layer 2 PDUs are kept intact and delivered across the service-provider infrastructure to the other side of the customer network.

This section contains the following information about configuring Layer 2 protocol tunneling:

•Default Layer 2 Protocol Tunneling Configuration, page 9-10

•Layer 2 Protocol Tunneling Configuration Guidelines, page 9-10

•Configuring Layer 2 Tunneling on a Port, page 9-11

•Configuring Layer 2 Tunneling Per-VLAN, page 9-12

•Monitoring and Verifying Tunneling Status, page 9-12

Default Layer 2 Protocol Tunneling Configuration

Table 9-2shows the default Layer 2 protocol tunneling configuration.

Table 9-2 Default Layer 2 Protocol Tunneling Configuration

Feature

Default Setting

 

 

Layer 2 protocol tunneling

Disabled for CDP, STP, and VTP.

 

 

Class of service (CoS) value

If a CoS value is configured on the interface for data

 

packets, that value is the default used for Layer 2 PDUs. If

 

none is configured, there is no default. This allows existing

 

CoS values to be maintained, unless the user configures

 

otherwise.

 

 

Layer 2 Protocol Tunneling Configuration Guidelines

These are some configuration guidelines and operating characteristics of Layer 2 protocol tunneling:

•The ML-Series card supports Per-VLAN Protocol Tunneling (PVPT), which allows protocol tunneling to be configured and run on a specific subinterface (VLAN). PVPT configuration is done at the subinterface level.

•PVPT should be configured on VLANs that carry multi-session transport (MST) BPDUs on the connected devices.

•The ML-Series card supports tunneling of CDP and STP (including MSTP and VTP protocols). Protocol tunneling is disabled by default but can be enabled for the individual protocols on IEEE 802.1Q tunnel ports or on specific VLANs.

Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2

9-10

78-19415-01

 

 

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Cisco Systems ONS 15310-CL, Cisco ONS 15310-MA manual Default Layer 2 Protocol Tunneling Configuration
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ONS 15310-CL, ONS 15310-MA, Cisco ONS 15310-MA specifications

Cisco Systems has long been a leader in networking and telecommunications technology, and among its impressive lineup of products, the Cisco ONS 15310 series stands out as an essential solution for optical networking. This series includes models such as the ONS 15310-MA, ONS 15310-CL, and ONS 15310-CA, each designed to meet the diverse needs of service providers and enterprises seeking to enhance their optical transport networks.

The Cisco ONS 15310-MA is an advanced multi-service platform designed for metropolitan area networks. It facilitates the seamless transport of data, voice, and video over optical networks. One of its main features is its ability to support a variety of interfaces, including Ethernet, SONET/SDH, and Wavelength Division Multiplexing (WDM), allowing users to integrate multiple services into a single platform. Additionally, the ONS 15310-MA supports advanced traffic management and Quality of Service (QoS) features to prioritize critical applications and ensure consistent performance.

The ONS 15310-CL variant is tailored for more specific applications, providing enhanced capabilities aimed at delivering carrier-grade services. It features a robust architecture that accommodates high-capacity traffic without compromising reliability. This model emphasizes low power consumption and a compact design, making it suitable for deployment in space-constrained environments. The ONS 15310-CL also supports a wide range of optical interfaces, making it highly flexible for various network configurations.

In terms of technologies, the Cisco ONS 15310 series leverages Optical Transport Network (OTN) capabilities, providing high efficiency and greater bandwidth utilization. OTN technology enables efficient error correction and adds resilience to the network through its built-in protection mechanisms. Furthermore, the series supports seamless integration with existing IP/MPLS networks, creating a cohesive infrastructure as organizations evolve their networking requirements.

One of the defining characteristics of the ONS 15310 series is its focus on scalability. Network operators can start with a modest deployment and gradually expand capacity as demand grows. This adaptability is complemented by Cisco's comprehensive management and monitoring tools, providing operators with real-time insights into network performance and facilitating proactive management.

In conclusion, the Cisco ONS 15310-MA and ONS 15310-CL models represent sophisticated solutions for modern optical networks. With their versatile features, advanced technologies, and robust design, they empower service providers and enterprises to build resilient, high-capacity networks that meet the demands of today’s data-driven world.
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