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Re: Reason for Ierrs in netstat


On 2018/02/22 21:18, Frank Wille wrote:

one of our servers has some network issues. Symptoms are: Bad ping (twice
as high as comparable machines on the same net), packet loss and increasing
number of Ierrs in "netstat -i".

Is there any chance I can find out the reason behind those Ierrs?

 Currently, the is no way to figure out the reason without modifying if_wm.c

        ifp->if_ierrors += 0ULL + /* ensure quad_t */
            + CSR_READ(sc, WMREG_CRCERRS)	/* CRC Error Count */
            + CSR_READ(sc, WMREG_ALGNERRC)	/* Alignment Error Count */
            + CSR_READ(sc, WMREG_SYMERRC)	/* Symbol Error Count */
            + CSR_READ(sc, WMREG_RXERRC)	/* receive error Count - R/clr */
            + CSR_READ(sc, WMREG_SEC)		/* Sequence Error Count */
            + CSR_READ(sc, WMREG_CEXTERR)	/* Carrier Extension Error Count */
            + CSR_READ(sc, WMREG_RLEC);	/* Receive Length Error Count */

 The cable or switch might be bad.

I rebooted the system a few hours ago, and there are some Ierrs again

tethys# netstat -i
Name  Mtu   Network       Address              Ipkts Ierrs    Opkts Oerrs Colls
wm0   1500  <Link>        00:30:48:xx:xx:xx  2385235   714  1996966     0     0

Some more information (system ist running NetBSD/amd64 6.1.5):

wm0 at pci7 dev 0 function 0: Intel i82573E IAMT (rev. 0x03)
wm0: interrupting at ioapic0 pin 16
wm0: PCI-Express bus
wm0: 256 word (8 address bits) SPI EEPROM
wm0: Ethernet address 00:30:48:xx:xx:xx
makphy0 at wm0 phy 1: Marvell 88E1111 Gigabit PHY, rev. 2

         address: 00:30:48:xx:xx:xx
         media: Ethernet autoselect (100baseTX full-duplex,flowcontrol,rxpause,txpause)
         status: active
         inet 212.62.xx.xx netmask 0xfffffff8 broadcast 212.62.xx.xx
         inet6 fe80::230:48ff:xxxx:xxxx%wm0 prefixlen 64 scopeid 0x1

                SAITOH Masanobu (

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