Re: Reason for Ierrs in netstat

[Masanobu SAITOH <msaitoh%execsw.org@localhost>]

Hi.

On 2018/02/22 21:18, Frank Wille wrote:
> Hi,
>
> 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
> already:
>
> 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
>
>
> wm0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>          capabilities=7ff80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx,TCP6CSUM_Rx,TCP6CSUM_Tx,UDP6CSUM_Rx,UDP6CSUM_Tx,TSO6>
>          enabled=3f80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx>
>          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 (msaitoh%execsw.org@localhost
                                 msaitoh%netbsd.org@localhost)