Route Switch Processor Packet Tracing - Avaya 8800 Troubleshooting Manual

but CPU utilization is high and CPU traces (example trace levels 9 and 11) are required
to diagnose the cause.
• To avoid potential issues due to logging trace data to the PCMCIA (or external flash) card,
disable the trace-logging (config bootconfig flags trace-logging false).
• Run trace commands from the console port whenever the CPU utilization is already
high.
• Initially activate tracing at lower verbosity settings (that is, 2 rather than 3). Increase to
verbosity level 3 or 4 only if required, and after level 2 is run safely.
• Avoid leaving traces active for extended periods of time. For high CPU utilizations, a few
seconds (typically less than 5 seconds) is generally sufficient to identify the cause for
sustained high CPU utilization.

Route Switch Processor Packet Tracing

The Avaya Ethernet Routing Switch 8800/8600 supports Route Switch Processor (RSP)
Packet Tracing on R and RS/8800 modules, which provides CLI and ACLI support for the
following COP debug commands:
• ercdIngressPktTraceEnable / ercdIngressPktTraceDisable
• ercdEgressPktTraceEnable / ercdEgressPktTraceDisable
• ercdIngressPktTrace
• ercdEgressPktTrace
• ercdIngressDisplayPacket
• ercdEgressDisplayPacket
Two CLI or ACLI commands enable or disable the ingress or egress Packet Tracing. When
you enable Packet Tracing, the CP sends a message to the COP and Packet Tracing is
internally enabled on the COP. Similarly, when Packet Tracing is disabled on the CP, it is
disabled on the COP. By default the Packet Tracing is enabled for one second. After one
second, the Packet Tracing is disabled internally. While enabling the Packet Tracing, RSP
selection is based on port by default—a port number is internally converted into RSP-ID and
Packet Tracing is enabled on that lane. Therefore, when Packet Tracing is enabled using one
port, it displays enabled on all the ports in that lane. Packet Tracing is collected on the COP
and it is sent to the CP when you enter the dump trace command through CLI or ACLI.
When you enter the dump trace command, a message is sent to the COP and all the Packet
Tracing data that is collected is copied into the reply buffer and is sent to the CP. On the CP,
the data is formatted and displayed. While displaying the Packet Tracing data, RSP selection
uses the port by default. Packet Tracing data can be displayed by using any of the ports in the
lane: it does not need to be on the same port on which the Packet Tracing is enabled.
Troubleshooting
Route Switch Processor Packet Tracing
July 2013 43