projects / unix-history / blame
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1 | .\" Copyright (c) 1983 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 292f29f3 | 5 | .\" @(#)ifconfig.8 6.1 (Berkeley) %G% |
| 09e42bf2 | 6 | .\" |
| 292f29f3 | 7 | .TH IFCONFIG 8C "" |
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8 | .UC 5 |
| 9 | .SH NAME | |
| 10 | ifconfig \- configure network interface parameters | |
| 11 | .SH SYOPNSIS | |
| 12 | .B /etc/ifconfig | |
| 13 | interface | |
| 14 | [ | |
| 15 | .I address | |
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16 | [ |
| 17 | .I dest_address | |
| 18 | ] ] [ | |
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19 | .I parameters |
| 20 | ] | |
| 21 | .SH DESCRIPTION | |
| 22 | .I Ifconfig | |
| 23 | is used to assign an address | |
| 24 | to a network interface and/or configure | |
| 25 | network interface parameters. | |
| 26 | .I Ifconfig | |
| 27 | must be used at boot time to define the network address | |
| 28 | of each interface present on a machine; it may also be used at | |
| 29 | a later time to redefine an interface's address. The | |
| 30 | .I interface | |
| 31 | parameter is a string of the form ``name unit'', e.g. ``en0'', while | |
| 32 | the address is either a host name present in the host name data | |
| 33 | base, | |
| 34 | .IR hosts (5), | |
| 35 | or a DARPA Internet address expressed in the Internet standard | |
| 36 | ``dot notation''. | |
| 37 | .PP | |
| 38 | The following parameters may be set with | |
| 39 | .IR ifconfig : | |
| 40 | .TP 15 | |
| 41 | .B up | |
| 42 | Mark an interface ``up''. | |
| 43 | .TP 15 | |
| 44 | .B down | |
| 45 | Mark an interface ``down''. When an interface is | |
| 46 | marked ``down'', the system will not attempt to | |
| 47 | transmit messages through that interface. | |
| 48 | .TP 15 | |
| 49 | .B trailers | |
| 50 | Enable the use of a ``trailer'' link level encapsulation when | |
| 51 | sending (default). | |
| 52 | If a network interface supports | |
| 53 | .IR trailers , | |
| 54 | the system will, when possible, encapsulate outgoing | |
| 55 | messages in a manner which minimizes the number of | |
| 56 | memory to memory copy operations performed by the receiver. | |
| 57 | .TP 15 | |
| 58 | .B \-trailers | |
| 59 | Disable the use of a ``trailer'' link level encapsulation. | |
| 60 | .TP 15 | |
| 61 | .B arp | |
| 62 | Enable the use of the Address Resolution Protocol in mapping | |
| 63 | between network level addresses and link level addresses (default). | |
| 64 | This is currently implemented for mapping between DARPA Internet | |
| 292f29f3 | 65 | addresses and 10Mb/s Ethernet addresses. |
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66 | .TP 15 |
| 67 | .B \-arp | |
| 68 | Disable the use of the Address Resolution Protocol. | |
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69 | .TP 15 |
| 70 | .B debug | |
| 71 | Enable driver dependent debugging code; usually, this turns on | |
| 72 | extra console error logging. | |
| 73 | .TP 15 | |
| 74 | .B \-debug | |
| 75 | Disable driver dependent debugging code. | |
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76 | .PP |
| 77 | .I Ifconfig | |
| 78 | displays the current configuration for a network interface | |
| 79 | when no optional parameters are supplied. | |
| 80 | .PP | |
| 81 | Only the super-user may modify the configuration of a network interface. | |
| 82 | .SH DIAGNOSTICS | |
| 83 | Messages indicating the specified interface does not exit, the | |
| 84 | requested address is unknown, the user is not privileged and | |
| 85 | tried to alter an interface's configuration. | |
| 86 | .SH "SEE ALSO" | |
| 87 | rc(8), intro(4N), netstat(1) |