1*61598Sbostic.\" Copyright (c) 1986, 1991, 1993 2*61598Sbostic.\" The Regents of the University of California. All rights reserved. 326213Ssklower.\" 443582Strent.\" %sccs.include.redist.man% 526213Ssklower.\" 6*61598Sbostic.\" @(#)ex.4 8.1 (Berkeley) 06/05/93 736756Sbostic.\" 847674Scael.Dd 947674Scael.Dt EX 4 vax 1047674Scael.Os BSD 4.2 1147674Scael.Sh NAME 1247674Scael.Nm ex 1347674Scael.Nd Excelan 10 Mb/s Ethernet interface 1447674Scael.Sh SYNOPSIS 1547674Scael.Cd "device ex0 at uba0 csr 164000 vector excdint" 1647674Scael.Sh DESCRIPTION 1726213SsklowerThe 1847674Scael.Nm ex 1926213Ssklowerinterface provides access to a 10 Mb/s Ethernet network through 2028251Skarelsan Excelan controller used as a link-layer interface. 2147674Scael.Pp 2228251SkarelsEach of the host's network addresses 2347674Scaelis specified at boot time with an 2447674Scael.Dv SIOCSIFADDR 2547674Scael.Xr ioctl 2 . 2647674ScaelThe 2747674Scael.Nm ex 2826213Ssklowerinterface employs the address resolution protocol described in 2947674Scael.Xr arp 4 3026213Ssklowerto dynamically map between Internet and Ethernet addresses on the local 3126213Ssklowernetwork. 3247674Scael.Pp 3347674ScaelThe interface normally tries to use a 3447674Scael.Dq trailer 3547674Scaelencapsulation 3628251Skarelsto minimize copying data on input and output. 3747674ScaelThe use of trailers is negotiated with 3847674Scael.Tn ARP . 3928251SkarelsThis negotiation may be disabled, on a per-interface basis, 4047674Scaelby setting the 4147674Scael.Dv IFF_NOTRAILERS 4247674Scaelflag with an 4347674Scael.Dv SIOCSIFFLAGS 4447674Scael.Xr ioctl . 4547674Scael.Sh DIAGNOSTICS 4647674Scael.Bl -diag 4747674Scael.It "ex%d: HW %c.%c, NX %c.%c, hardware address %s." 4826213SsklowerThis provides firmware revisions levels, and is expected during 4926213Ssklowerautoconfiguration. 5047674Scael.Pp 5147674Scael.It ex%d: can't initialize. 5226213SsklowerThere was a failure in allocating unibus resources for the device. 5347674Scael.Pp 5447674Scael.It "ex%d: configuration failed; cc = %x." 5526213SsklowerThe hardware indicated an error when trying to initalize itself. 5626213SsklowerThe error code returned is described at length in the device 5726213SsklowerReference Manual. 5847674Scael.Pp 5947674Scael.It ex%d: receive error %b. 6047674ScaelThe hardware indicated an error 6126213Ssklowerin reading a packet from the cable. 6226213SsklowerSpecific Error bits are provided 6347674Scael.Pp 6447674Scael.It ex%d: transmit error %b. 6547674ScaelThe hardware indicated an error 6626213Ssklowerin transmitting a packet to the cable or an illegally sized packet. 6726213SsklowerSpecific Error bits are provided 6847674Scael.Pp 6947674Scael.It ex%d: can't handle af%d. 7047674ScaelThe interface was handed 7126213Ssklowera message with addresses formatted in an unsuitable address 7226213Ssklowerfamily; the packet was dropped. 7347674Scael.El 7447674Scael.Sh SEE ALSO 7547674Scael.Xr netintro 4 , 7647674Scael.Xr inet 4 , 7747674Scael.Xr arp 4 7847674Scael.Sh HISTORY 7947674ScaelThe 8047674Scael.Nm 8147674Scaeldriver appeared in 8247674Scael.Bx 4.3 . 83