Overview

Overview

This chapter references equipment safety and electrical standards, introduces you to the TSR system hardware, and provides an overview of the hardware installation process.

If you do not have access to personnel trained in facilities planning at your site, contact your sales representative for assistance.

After reading this document, arrange for a site survey with Avici Customer Service. See "Support Services" in the Preface for customer service contact information. Proceed with the installation of a TSR system only after completion of a site survey.

Installation of a TSR system requires qualified personnel fully trained in network equipment installations.

Safety Information

To avoid personal injury and damage to equipment, adhere to all caution and warning statements for this product and any safety requirements specific to your site.

The TSR system meets the following regulatory requirements for product safety:

UL and CSA Standard for Safety of Information Technology Equipment, including Electrical Business Equipment (UL 1950, 3rd Edition and CAN/CSA C22.2 No. 950-95).

Class 1 Laser Product, 21 CFR, Chapter 1, 1040.10.

Meets NEBS GR-63-Core and GR-1089-Core where applicable.

European Norm EN60950 EMC: EN 55022, EN 50082, EN 60825-1.

North America-UL and CSA specifications apply to an absolute maximum input voltage of -60 Vdc, wherein battery return and logic return are properly grounded to earth ground at the system ground window.

The TSR system meets FCC Part 15 Class A System regulatory requirements for electromagnetic interference testing, which states that the TSR complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Product Description

The Terabit Switch Router (TSR) is a carrier class IP optimized switch router for core networks. The TSR system provides increased scaleability, carrier class reliability, optical network integration, and is ideal for carriers and facilities-based ISPs providing Virtual Private Networks (VPN), Internet-2, voice over IP, and other IP services.

The TSR system product line includes two configurations, TSR Full Bay and TSR Split Bay. The TSR Split Bay design offers fault tolerance and assurance of future scaleability in one bay.

The switching fabric in the TSR system supports higher speeds and multiples of different types of router modules. The module-to-module interconnection consists of a passive set of transmission lines embedded within an extensible backplane. This supports increases in module-to-module interconnection bandwidth. Multiple router modules within the TSR system significantly increase the number, compatibility, range of customer ports, and port access speeds available. Points of Presence (POPs) are connected through multiple SONET links and terminated at the TSR system.

Another feature of the TSR is the use of composite links to increase bandwidth between two core routers. Up to 64 individual Packet Over SONET (POS) interfaces (member links) associate themselves as a single interface to the higher layer protocols, including Internet Protocol (IP) and Multi-protocol Label Switching (MPLS). This excludes OC-192c, which supports 16 individual POS interfaces per composite link. The interface represents the aggregate of the composite link members. In the event of a failure to one of the members, traffic is redistributed to the surviving members in 45 ms or less. This feature of the TSR system's flexible architecture simplifies protocol configuration.

The TSR system configuration supports a less-complex more-scalable use of multiple Internet Gateway Protocol (IGP) link-state areas. Additionally, it supports Border Gateway Protocol Version 4 (BGP-4), Open Shortest Path First (OSPF), and Intermediate System-to-Intermediate System (IS-IS) for wide-areas through WAN switching and QoS.

Multiple TSR system modules communicate through packets routed from source to destination in a distributed method with no single point of failure. As the hardware configuration increases, overall cross-sectional network bandwidth and ability to sustain multiple points of failure also increases.

Prompt failure detection enables automatic alternative path redistribution. This enables the TSR to recover from link and module failures within 50 msec.

Bay Configurations

The TSR bay configurations, TSR Full Bay (including the multi-bay configuration of 2-bay, 4-bay, etc.) and TSR Split Bay, serve a wide range of customer service requirements.

The TSR Full Bay configuration is expandable to multiple bays in two back-to-back rows. Figure 1-1 shows the TSR Full Bay configuration.

Figure 1-1. Maximum Bay Configuration

TSR Full Bay Configuration

The TSR Full Bay configuration contains a collection of single IP router modules and general-purpose dual-redundant server modules interconnected through a passive fabric interconnection backplane. The backplane supports multiple switching paths that enable TSR router modules to operate independently and to intercommunicate one module to another through IP packet switching. Packet cut-through and high speed module-to-module interconnections significantly reduce packet forwarding delay. Multiple paths load share by random path selection on intermodule packet transfer. The Full Bay is currently available in 1-bay, 2-bay, and 4-bay configurations.

The TSR Full Bay is designed to incorporate fully redundant:

Power supply inputs, at the Breaker Interface Panel (BIP) level

Power connections, to the TSR system backplane with distributed power conversion on each module

Cooling modules

Server modules

Single-Bay Configuration

The TSR Full Bay hardware configuration (1-bay) consists of one fully-loaded TSR bay which includes:

Up to two server modules

Router modules

Two cooling modules

Two bay controller modules

Figure 1-2 shows the TSR bay hardware configuration.

Figure 1-2. Full Bay Hardware Configuration (1-bay)

Multi-Bay Configurations

The TSR Full Bay offers scalability without service interruptions and expands to offer 2-bay and 4-bay configurations. After the second bay is added to form a pair, bays are added in pairs.

The 2-bay Configuration

In a 2-bay configuration, bays connect side-by-side. The first bay is bay 1 and the second bay is referred to as bay 3. Refer to Figure 1-3.

Figure 1-3. Full Bay Hardware Configuration (2-bay)

The 4-bay Configuration

In the 4-bay configuration, the two bay solution in the front row expands to four bays by adding bay 2 and bay 4 in a back-to-back row. Refer to Figure 1-4.

Figure 1-4. Full Bay Hardware Configuration (4-bay)

TSR Split Bay Configuration

The TSR Split Bay configuration has an upper and a lower router. These separate routers and their respective backplanes operate independently. Each TSR Split Bay has an upper and lower server module, each with its own collection of single IP router modules and passive fabric interconnection backplane. The upper and lower backplanes operate independently but support the multiple switching paths in their respective bay locations. Packet cut-through and high speed module-to-module interconnections significantly reduce packet forwarding delay. Multiple paths load share by random path selection on intermodule packet transfer.

NOTE Multiple Split Bay TSRs cannot be connected in a multi-bay configuration.

The TSR Split Bay design allows the upper and lower routers to perform independently. The upper and lower routers have redundant:

Power supply inputs (at BIP) level

Power connections (to the TSR system backplane with distributed power conversion on each module)

Cooling modules

Bay controllers or warm stand-by server

The TSR Split Bay hardware configuration consists of an upper router and a lower router. Each router can include:

Up to two server modules

Router modules

Two cooling modules

Two bay controller modules

Figure 1-5 shows a TSR Split Bay hardware configuration

.

Figure 1-5. TSR Split Bay Hardware Configuration

Bay Components

The TSR bay houses the server, router, bay controller, and cooling modules. The TSR also ships with four shelf covers. These components are all field replaceable units.

Figure 1-6 shows the TSR bay hardware components.

Figure 1-6. Bay Components

Router Modules

The TSR system supports router modules in combinations of module speeds in a single chassis backplane. Router modules support PPP, IS-IS, OSPF, BGP, and MPLS protocols.

Router modules interconnect to server modules through a 100BaseT Ethernet cable (RJ-45).

Server Modules

The TSR offers two identical servers, the primary and secondary server.

Primary Server

Each server module provides a 300 Mhz PowerPC 604e CPU, 576 Mbytes of memory (64 Mb on the baseboard and 512 Mb of add-on PMC memory), and 32Kbytes of NVRAM for maintaining configuration and software images.

The server module also supports four 10/100BaseT Ethernet port and DB-9 console port connections.

Each server module resides in a module enclosure together with a power conversion card, persistent file storage, and a pair of solid state disks.

Secondary Server (Warm Stand-by Server)

Physically identical to the primary server, the warm stand-by server is designed and implemented to take over in the event the primary server becomes inactive. The servers are connected to the bay controllers via the server connector panel. The ETH3 and ETH4 ports of the server connect to the server connector panel. A server connector panel connection leads to an Ethernet repeater located on the bay controllers. This repeater allows the bay controller and servers to look like one logical LAN. The ETH0 port provides a redundant warm stand-by connection between the servers in the event the primary warm server communication path via ETH3 and ETH4 goes down.

The primary and secondary servers contain two heartbeat connections for redundancy. ETH3 and ETH4 connections are required to form the first peering session. The first heartbeat is a multicast message over the bay controller network. The second heartbeat is over the server ETH0 port and this requires a connection to an external network management system. The two heartbeats ETH3/ETH4 and ETH0 work in unison and begin as soon as the server is activated.

If the primary server stops receiving heartbeats, it initiates a management trap, and if after 5 minutes it has not received a heartbeat, it will wait for heartbeats from the secondary server. The secondary server will wait for heartbeats from the primary server for 5 minutes before it becomes active. This allows the network operator sufficient time to reboot the primary and allow it to remain as the primary.

For software configuration details, refer to the IPriori CLI Reference (Vol. 1).

NOTE In a Split Bay configuration, you must chose between having either a redundant bay controller or warm standby server. This is due to a limitation in available ports. In addition, it is not possible to support redundant warm stand-by servers on both halves of the split bay.

Cooling Assembly

The cooling assembly consists of two cooling modules and two bay controllers.

Each cooling module provides two fans, which are regulated by one of two bay controllers (The second controller is passive to provide redundancy if needed). The active bay controller monitors and regulates the cooling of the TSR bays by sending signals to the cooling modules to raise or lower the speed of the fans as needed.

The TSR bay controller modules monitor both the system power and cooling modules. The TSR bay controllers monitor the cooling modules and ensure proper airflow within the system components within the bay.

Bay Shelf Cover

The Terabit Switch Router bay shelf cover is an Electro-magnetic Interference (EMI) shield for EMI compliance. The TSR is shipped with the covers in place. The shelf cover fits easily onto each shelf of the TSR bay and requires no hardware.

Installation

For information about installation tasks, please refer to the Terabit Switch Router Site Preparation Guide.

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