Force10 Networks 100-00055-01 manual Reloading Firmware

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.

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.

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