Friday, October 14, 2005

Cisco Counters meaning

Counters

* Packets input - Total number of error-free packets received.
* Broadcasts - Total number of broadcast or multicast packets received.
* Runts - Number of packets discarded because they are smaller
than the medium's minimum packet size.
* Giants - Number of packets that are discarded because they
exceed the medium's maximum packet size.
* Throttle - This counter indicates the number of times the input
buffers of an interface have been cleaned because they have not been
serviced fast enough or they are overwhelmed. Typically, an explorer
storm can cause the throttles counter to increment. It's important to
note that every time you have a throttle, all the packets in the input
queue get dropped. This causes very slow performance and may also
disrupt existing sessions.
* Parity - Number of parity errors on the HSSI.
* RX Disabled - Indicates inability to get a buffer when accessing a packet.
* Input Errors - Sum of all errors that prevented the receipt of
datagrams. This may not balance with the sum of the enumerated output
errors, because some datagrams may have more than one error and others
may have errors that do not fall into any of the specific categories.
* CRC - Cyclic redundancy checksum generated mismatch. CRC errors
also are reported when a far-end abort occurs and when the idle flag
pattern is corrupted. This makes it possible to get CRC errors even
when there is no data traffic.
* Frame - Number of packets received incorrectly having a CRC
error and a noninteger number of octets.
* Overrun - Number of times the serial receiver hardware was
unable to hand received data to a hardware buffer because the input
rate exceeded the receiver's ability to handle the data.
* Ignored - Number of received packets ignored by the interface
because the interface hardware ran low on internal buffers.
* Abort - Number of packets whose receipt was aborted.
* Bytes - Total number of bytes, including data and MAC
encapsulation, transmitted by the system.
* Underruns - Number of times that the far-end router's
transmitter has been running faster than the near-end router's
receiver can handle. This may never happen (be reported) on some
interfaces.
* Congestion Drop - Number of messages discarded because the
output queue on an interface grew too long.
* Output Errors - Sum of all errors that prevented the final
transmission. This may not balance with the sum of the enumerated
output errors, because some datagrams may have more than one error and
others may have errors that do not fall into any of the specific
categories.
* Interface Resets - Number of times an interface has been completely reset.
* Restarts - Number of times the controller was restarted because of errors.
* Carrier Transitions - Number of times the carrier detect signal
of a serial interface has changed state.

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