Chapter 8 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 8-10

•Layer 2 Protocol Tunneling Configuration Guidelines, page 8-10

•Configuring Layer 2 Tunneling on a Port, page 8-11

•Configuring Layer 2 Tunneling Per-VLAN, page 8-12

•Monitoring and Verifying Tunneling Status, page 8-12

Default Layer 2 Protocol Tunneling Configuration

Table 8-2shows the default Layer 2 protocol tunneling configuration.

Table 8-2 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 and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5

8-10

78-18133-01

 

 

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

Cisco Systems has established itself as a leader in the networking domain, offering a wide array of solutions to meet the needs of modern businesses. Among its impressive product lineup are the Cisco 15310-CL and 15310-MA routers, designed to provide advanced network performance and reliability.

The Cisco 15310-CL is a versatile platform that primarily serves as a carrier-class router aimed at supporting high-speed data and voice services. It is built to handle the demands of large enterprises and service providers, offering a robust design that ensures maximum uptime and performance. One of its standout features is its modular architecture, which enables users to customize their configurations based on specific application needs. This scalability allows for future expansion without the need for a complete hardware overhaul.

Key technologies integrated into the Cisco 15310-CL include high-density Ethernet interfaces and a comprehensive suite of Layer 2 and Layer 3 protocol support. The device is capable of supporting multiple types of connections, including TDM, ATM, and Ethernet. This flexibility makes it an ideal choice for organizations that require seamless migration between various service types. Moreover, with features such as MPLS (Multiprotocol Label Switching) support and advanced Quality of Service (QoS) mechanisms, the router ensures that critical applications receive the necessary bandwidth and low latency required for optimal performance.

In contrast, the Cisco 15310-MA focuses on access solutions, providing a cost-effective entry point for businesses looking to enhance their network capabilities. It is well-suited for smaller offices or branch locations that need reliable connectivity without the expense and complexity associated with larger systems. The device supports a range of access methods and provides essential features like firewall capabilities, VPN support, and comprehensive security measures to protect sensitive data.

Both models benefit from Cisco's commitment to security and manageability, offering features like enhanced encryption protocols and user authentication mechanisms that help safeguard networks against threats. Additionally, they can be managed through Cisco’s intuitive software tools, simplifying configuration and monitoring tasks for IT administrators.

The Cisco 15310-CL and 15310-MA are ideal solutions for businesses seeking to enhance their network infrastructure, ensuring firms can keep pace with evolving technology demands while maintaining a focus on security and performance. Their combination of advanced features, modular capabilities, and robust support makes them valuable assets in the networking landscape.
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