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P-Series Installation and Operation Guide, version 2.3.1.2 33
Reloading Firmware
During firmware reloading, all packets flow regardless of capture/forward policies, as the policies cannot
be enforced during system initialization. This "open" state during configuration state transition ensures that
there is no interruption of service when the DPI is updated.
If the OS crashes or is halted, the device drivers are rendered inactive, but the card continues to operate
independently and block/forward policies are still enforced. This behavior applies even when the device
drivers are re-installed during a reboot.
Table 6 Runtime Statistics Description
Statistic Description
Total Packets Shows the number of packets received by the ports. This is a Layer 1 statistic and is
independent of whether the OS interface is up or down.
TCP/UDP/ICMP/Other Reports the type of packets received during matching. Other includes all non-IP types
and all IP types other than TCP, UDP, and ICMP.
Capture Packets Counts the total number of packets matched and captured by some policy.
Total Flows Reports the number of new flows started according to the flow policies.
Stateful Packets Reports the number of packets matched because of a stateful policy. The mathematical
difference between this counter and the Captured Packets counter is the number of
packets captured by stateless policies.
Blocked Packets Reports the number of packets blocked because of some policy, except that packets
blocked by default are not counted.
Rx Packets/Bytes/Bits Tracks data received by the OS. Any difference between the values in this line and those
in the Captured Packets line is due to buffering and/or packet loss; packet loss is due to
high contention on the CPU.
Errors Reports the number of anomalous receive conditions the driver encounters.
Truncated Packets This feature is not supported.
Delayed Packets Reports the number of packets that were stored in the temporary buffer in hardware.