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AR# 14179

LogiCORE Gigabit and 10 Gigabit Ethernet MAC v4.0 - Are the statistics registers reset after a READ operation?

Description

General Description:

Are the statistics registers reset after a READ operation?

Solution

Each statistics counter is described in IEEE802.3-2000 sub-clause 5.2.2.1.x as a "Generalized non-resettable counter", and this is how they have been implemented in the Gigabit and 10 Gigabit Ethernet MAC cores using block memory. Therefore, they will not be reset after a READ operation, and they will return to zero only when they naturally wrap around or when the device is reconfigured.

The rate at which these counters increment (rather than the actual values of the counters) is of primary importance to network analyzers.

AR# 14179
Date Created 08/29/2007
Last Updated 12/15/2012
Status Active
Type General Article