Chapter 14 Configuring Resilient Packet Ring on the ML-Series Card

Understanding RPR

Figure 14-3

RPR Frame for ML-Series Card

 

 

 

 

 

1 byte

1 byte

1 byte

2 bytes

 

68-1522 bytes

2-4 bytes

1 byte

 

 

 

 

 

 

 

 

 

 

Flag

Add

Control

Protocol

 

 

RPR Payload

CRC

Flag

 

 

 

 

 

 

 

 

 

 

0x7E

0x0F

0x00

0x0042

 

 

 

 

0x7F

 

 

 

 

4 byte

4 bytes

60-1514 bytes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RPR Address

RPR Control

Ethernet Payload

 

 

 

 

 

 

 

 

 

 

 

 

7 byte

1 byte 6 bytes 6 bytes

6 bytes

46-1500 bytes

4 bytes

Preamble

SFD

DA

SA

Ln/Type

Data/Pad

FCS

 

 

 

 

 

 

 

134984

The RPR framing and header includes a number of fields, including four bytes for source and destination station information and another four bytes for RPR control and quality of service (QoS). Figure 14-4illustrates the RPR frame format. Table 14-1defines the most important fields.

 

 

Figure 14-4

RPR Frame Fields

 

 

 

 

 

15 14 13 12 11 10

9

8

7

6

5

4

3 2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Protocol (RPR V1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Destination ID

 

 

 

Destination Station

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Source ID

 

 

 

 

Source Station

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRI

W

B

D

 

D

 

 

 

 

TTL

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wrap Station

 

V

 

D

D

RSVD

Type

 

 

 

 

 

 

 

 

W

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Payload (Ethernet Frame)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

134982

 

 

 

 

 

Table 14-1

Definitions of RPR Frame Fields

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Destination Station

 

 

 

An eight-bit field specifying the MAC address of a specific ML-Series card in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the RPR as the destination. It has two well-known addresses, 0xff for Multicast

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DA-MAC and 0x00 for Unknown DA-MAC.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Source Station

 

 

 

 

 

 

 

An eight-bit field specifying the MAC address of a specific ML-Series card in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the RPR as the source.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

78-18133-01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14-5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 172 Page 174
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Image 173
Cisco Systems 15310-CL, 15310-MA DA-MAC and 0x00 for Unknown DA-MAC, RPR as the source, 14-5, RPR Frame for ML-Series Card
Page 172 Page 174

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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