LayerscapeのトピックLS1021A Ethernet Receive Carrier Sense Error Counter counts up! https://community.nxp.com/t5/Layerscape/LS1021A-Ethernet-Receive-Carrier-Sense-Error-Counter-counts-up/m-p/654872#M2322 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I have the LS1021A running on a custom board that is very similiar to the TWR board.</P><P>In some situations - I cannot say in which one exactly - I loose some ping packets and I see</P><P>ethtool counting rx-carrier-sense-errors.</P><P></P><P>I figured out that this counter counter comes directly from the eTSEC RMON MIB register eTSECx_RCSE.</P><P>What does this register really count? Where should I start diggin'</P><P></P><P>Thanks,</P><P>Matthias</P><PRE>root@sdk2-0-105:~# ethtool -S eth2 | grep err&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-allocation-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-large-frame-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-short-frame-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-non-octet-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-crc-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-overrun-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-busy-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-babbling-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ethernet-bus-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-babbling-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-underrun-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-timeout-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-fcs-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-alignment-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-frame-length-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-code-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-carrier-sense-error: 24&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-deferral-packets: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-excessive-deferral-packets: 0&nbsp; ..... </PRE></BODY></HTML> Tue, 06 Dec 2016 21:07:47 GMT MatthiasFuchs 2016-12-06T21:07:47Z LS1021A Ethernet Receive Carrier Sense Error Counter counts up! https://community.nxp.com/t5/Layerscape/LS1021A-Ethernet-Receive-Carrier-Sense-Error-Counter-counts-up/m-p/654872#M2322 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I have the LS1021A running on a custom board that is very similiar to the TWR board.</P><P>In some situations - I cannot say in which one exactly - I loose some ping packets and I see</P><P>ethtool counting rx-carrier-sense-errors.</P><P></P><P>I figured out that this counter counter comes directly from the eTSEC RMON MIB register eTSECx_RCSE.</P><P>What does this register really count? Where should I start diggin'</P><P></P><P>Thanks,</P><P>Matthias</P><PRE>root@sdk2-0-105:~# ethtool -S eth2 | grep err&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-allocation-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-large-frame-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-short-frame-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-non-octet-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-crc-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-overrun-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-busy-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-babbling-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ethernet-bus-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-babbling-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-underrun-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-timeout-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-fcs-errors: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-alignment-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-frame-length-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-code-error: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rx-carrier-sense-error: 24&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-deferral-packets: 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tx-excessive-deferral-packets: 0&nbsp; ..... </PRE></BODY></HTML> Tue, 06 Dec 2016 21:07:47 GMT https://community.nxp.com/t5/Layerscape/LS1021A-Ethernet-Receive-Carrier-Sense-Error-Counter-counts-up/m-p/654872#M2322 MatthiasFuchs 2016-12-06T21:07:47Z Re: LS1021A Ethernet Receive Carrier Sense Error Counter counts up! https://community.nxp.com/t5/Layerscape/LS1021A-Ethernet-Receive-Carrier-Sense-Error-Counter-counts-up/m-p/654873#M2323 <HTML><HEAD></HEAD><BODY><P><BR />In general, this counter increments when the controller sees unexpected<BR />behaviour of the MAC/PHY interface signals. The exact conditions<BR />depend on the interface type. For MII it can be random floating of<BR />CRS. For RGMII it counts when a certain combination of Rx_DV/ER<BR />and RxD[0:3] is observed, see RGMII specification, Table 4, False<BR />Carrier row.&nbsp; The suggestion is to monitor the MAC/PHY interface<BR />and diagnose the PHY.</P><P><BR />Have a great day,<BR />Platon</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 08 Dec 2016 13:42:04 GMT https://community.nxp.com/t5/Layerscape/LS1021A-Ethernet-Receive-Carrier-Sense-Error-Counter-counts-up/m-p/654873#M2323 bpe 2016-12-08T13:42:04Z