Performance Monitoring And Troubleshooting; Fault Management - Nortel Versalar 15000 Troubleshooting Manual

Managing and Troubleshooting the Versalar Switch Router 15000
To meet these requirements, the Versalar 15000 maintains numerous
accounting statistics for each service class within an access interface for both
inbound and outbound traffic. You can retrieve the statistics through file
transfer or through the Simplified Network Management Protocol (SNMP).
With its quality of service (QoS) classification and traffic management
features, the Versalar 15000 provides complete and accurate accounting for all
traffic in and out of the system. Thus, service providers can create
usage-based billing records for each customer as well as monitor service level
agreements (SLAs). For more information, see Chapter 3, "Gathering Traffic
Statistics for Customer Billing."

Performance Monitoring and Troubleshooting

The Versalar 15000 is designed for high-availability network operation. It
provides fully redundant power and cooling. All power systems are hot
swappable and can be replaced, if necessary.
Extensive monitoring capabilities, including the facilities data link (FDL), are
available to allow you to monitor system performance data. Should any
system problems arise, a number of troubleshooting tools are also included.
These tools include loopback detection, Operations and Management (OAM),
and bit error rate testing (BERT). Chapter 6, "Monitoring and
Troubleshooting," provides more information about these monitoring and
troubleshooting capabilities.

Fault Management

Once system problems have been identified, the Versalar 15000 provides
detailed fault management capabilities to resolve them. Specifically, the
Versalar 15000 supports N+1 redundancy on the channel access processor
(CAP) cards.
The CAP cards perform the channelization of the DS3/OC-3 traffic, while the
Internet forwarding processor (IFP) and system services processor (SSP)
cards provide additional redundancy features to ensure that the system
remains operational in the event that one of the cards fails. For more
information on all of these cards, see Chapter 7, "Fault Management."
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