On Thu, 08 May 2003 07:46:15 -0700 (PDT) "David S. Miller" <davem@redhat.com> wrote: | From: Hagen Paul Pfeifer <toaster@jauu.net> | Date: Thu, 8 May 2003 17:41:55 +0200 | | * Randy.Dunlap | 2003-05-08 07:15:48 [-0700]: | | >Some NICs provide collision reports. | >I haven't seen one that reports jamming specifically. | | Fine, do you know any names of NICs which support this feature? Have you looked for any? | My experience matches Randy's, no NICs provide this statistic. | - National Semi. DP83815: (search at www.national.com) p. 80: TX Status: [bit]21 OWC Out of Window Collision The MAC encountered an "out of window" collision during the transmission of this packet. [bit]20 EC Excessive Collisions The number of collisions during the transmission of this packet was excessive, indicating transmission failure. If TXCFG register ECRETRY=0, this bit is set after 16 collisions. If TXCFG register ECRETRY=1, this bit is set after 4 Excessive Collision events (64 collisions). [bits]19-16 CCNT Collision Count If TXCFG register ECRETRY=0, this field indicates the number of collisions encountered during the transmission of this packet. If TXCFG register ECRETRY=1, CCNT[3:2] = Excessive Collisions (0-3) CCNT[1] = Multiple Collisions CCNT[0] = Single Collision p. 81: RX Status: [bit]16 COL Collision Activity The receive packet had a collision during reception. Similar for National DP83816 and DP83820. Intel PRO/100 8255x NICs: (from sf.net/projects/e1000 Documentation) [dowrd]45 Transmit Total Collisions Counter [dword]46 Transmit Multiple Collisions Counter [dword]47 Transmit Single Collisions Counter [dword]51 Transmit Late Collisions Errors Counter [dword]52 Transmit Maximum Collisions Errors Counter -- ~Randy - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
