Chapter 10

Managing PNNI Routing

This chapter describes how to use the command-line interface to manage the PNNI routing in an Avaya M770 ATM Switch. For information about how to access and use the Avaya M770 ATM Switch command-line interface, see Chapter 3 How to Use the Command-line Interface.

PNNI (Private Network-Network Interface)

The description in this chapter assumes basic knowledge of the PNNI protocol. For more information regarding the PNNI standard, refer to the ATM Forum publication (af-pnni-0055.000).

Hierarchical PNNI

Hierarchical PNNI is supported from M770 ATM Switch Embedded S/W Version

2.1and above. You can now configure your ATM network into a hierarchy of peer groups, with multiple peer groups at each level. A single M770 ATM Switch can operate as both a physical and a logical node. There may be up to four logical nodes in four heirarchy levels in the same switch. The physical node represents the switch itself, while a logical node in a higher level peer group represents a lower level peer group.

In the following sections describing PNNI, the 'level' parameter in a command refers to the instance of the PNNI node within the switch, level = 1 is the physical node, and level = 2 is the first logical node.

PNNI Implementation in the Avaya M770 ATM Switch

The architecture of the M770 ATM Switch is a distributed one, i.e. no single point of failure. All cards implement full PNNI, and at the same time share the information received and produced by each other. Information generated by an individual card is shared by all other cards and accepted as if it is self-originated. All switch cards share the same node ID and peer group ID, so to other switches in the peer group it looks like one unified switch.

When Hierarchical PNNI configurtion is used, the Master Agent module of the Avaya M770 ATM switch (the PDC or PNNI Designated Card) has a special role. This is the module that advertises the switch as willing to become a PGL (Peer Group Leader). If it is elected as PGL, the next higher level node the LGN (Logical Group Node) resides in the PDC module. Therefore, commands that are applicable only PGL or LGN can be performed only on the PDC.

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M770 specifications

The Avaya M770 is a highly advanced media processor that is part of Avaya's robust suite of communication solutions designed for enterprise environments. This powerful device caters to the needs of modern businesses, providing an efficient platform for managing voice, video, and data communications.

One of the standout features of the Avaya M770 is its high-density processing capability. The device can handle a significant volume of calls concurrently, which makes it an ideal solution for large organizations requiring a reliable communication backbone. The M770 supports a variety of codecs, ensuring high-quality audio and video transmission, which is pivotal for maintaining clarity during communication.

Incorporating cutting-edge technologies, the Avaya M770 is built upon a scalable architecture that allows for easy expansion as business needs evolve. This scalability means organizations do not have to invest in new equipment every time they grow; they can simply add additional resources to the existing system. This makes the M770 a cost-effective solution in the long run.

The M770 also boasts advanced security features, essential for protecting sensitive communications within a business. It employs encryption protocols to safeguard data and voice transmissions, ensuring that corporate information remains secure from potential cyber threats. This focus on security is increasingly critical in today's interconnected world, where data breaches can have devastating consequences.

Another notable characteristic of the Avaya M770 is its integration capabilities. The device can seamlessly connect with Avaya’s suite of applications and third-party solutions, enabling businesses to create a unified communications environment tailored to their specific needs. This interoperability allows for a more streamlined workflow, enhancing productivity within the organization.

Furthermore, the M770 features intuitive management tools that simplify the administration of telephony systems. With a user-friendly interface, IT administrators can easily monitor performance, manage resources, and troubleshoot issues. This ease of use reduces the time and effort needed for system management, allowing IT teams to focus on strategic initiatives.

In conclusion, the Avaya M770 is a comprehensive media processing solution that combines scalability, security, and ease of integration to meet the demands of contemporary enterprises. With its ability to support high-density communications and its advanced management capabilities, it serves as a critical asset for businesses looking to enhance their communication infrastructure.
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