2011-03-30 13:49:47 +00:00
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.TH IPCONFIG 8
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.SH NAME
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2018-05-02 18:29:29 +00:00
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ipconfig, rip, linklocal \- Internet configuration and routing
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2011-03-30 13:49:47 +00:00
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.SH SYNOPSIS
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.in +0.25i
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.ti -0.25i
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.B ip/ipconfig
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2022-03-13 17:29:16 +00:00
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.RB [ -6DGNOPdnprtuX ]
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2011-03-30 13:49:47 +00:00
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.RB [ -b
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.IR baud ]
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.RB [ -c
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.IR ctl ]
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.RB [ -g
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.IR gateway ]
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.RB [ -h
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.IR host ]
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.RB [ -m
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.IR mtu ]
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.RB [ -o
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.IR dhcp-opt ]
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2015-01-10 19:27:45 +00:00
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.RB [ -f
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.IR dbfile ]
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2011-03-30 13:49:47 +00:00
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.RB [ -x
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.IR netmtpt ]
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[
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.I type
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[
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.I device
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]\|]
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.RI [ verb ]
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[
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.I local
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[
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.I mask
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[
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.I remote
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[
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.I file-server
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[
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.I auth
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]\|]\|]\|]\|]
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.PP
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.B ip/rip
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.RB [ -bdr ]
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.RB [ -x
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.IR netmtpt ]
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.PP
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.B ip/linklocal
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[
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.B -t
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.I gwipv4
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]
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.I mac
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\&...
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.SH DESCRIPTION
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.I Ipconfig
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2012-12-06 06:30:16 +00:00
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binds a device interface to a mounted IP stack (default
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2011-03-30 13:49:47 +00:00
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.BR /net )
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and configures the interface with a local address and optionally
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a mask, a remote address, a file server and an authentication server address.
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2012-12-06 06:30:16 +00:00
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If no device is specified, the first
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.B ether
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2012-12-06 06:34:56 +00:00
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device on the mounted IP stack is used.
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2011-03-30 13:49:47 +00:00
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The addresses can be specified in the command line or obtained via DHCP.
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If DHCP is requested, it will also obtain the addresses of DNS
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servers, NTP servers, gateways, a Plan 9 file server,
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and a Plan 9 authentication server.
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2018-05-02 18:29:29 +00:00
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Information from DHCP and IPv6 router advertisements is written to
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2011-03-30 13:49:47 +00:00
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.B /net/ndb
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in the form of an
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.IR ndb (8)
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2018-05-02 18:29:29 +00:00
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entry unless the
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.B P
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flag has been specified.
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2011-03-30 13:49:47 +00:00
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.PP
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.I Type
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may be
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.BR ether ,
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.BR gbe ,
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.BR ppp ,
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.BR pkt ,
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or
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.BR loopback .
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The
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.B gbe
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type is equivalent to
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.B ether
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except that it allows jumbo packets (up to ~9KB).
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The
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.B pkt
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interface passes all IP packets to and from a user program.
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For
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.B ppp
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the device can be any byte stream device.
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.PP
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The verb (default
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.IR add )
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determines the action performed. The usual verbs are:
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.TF remove
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.TP
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.B add
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if the device is not bound to the IP stack, bind it.
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Add the given local address, mask, and remote address to the interface.
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An interface may have multiple addresses.
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.TP
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.B remove
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remove the address from the device interface.
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.TP
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.B unbind
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unbind the device interface and all its addresses from the
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IP stack.
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.PD
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.PP
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The IPv6-specific verbs, which take different arguments, are:
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.TP
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.BI "add6 " "prefix pfx-len onlink auto validlt preflt"
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sets the named IPv6 parameters; see
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.IR ip (3)
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for more detail.
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.TP
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.BI "ra6 " "[ keyword value ] ..."
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sets IPv6 router advertisement parameter
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.IR keyword 's
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.IR value .
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See
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.IR ip (3)
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for more detail.
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Setting
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.I recvra
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non-zero also forks a process to
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receive and process router advertisements.
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Setting
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.I sendra
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non-zero also
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enables IP routing on the interface,
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forks a process to send router advertisements,
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and if no
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.I recvra
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process is running, forks one.
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.PD
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.PP
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The options are:
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.TF M
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.PD
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.TP
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.B 6
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if adding an address (the default action),
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add the IPv6 link-local address.
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.TP
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.B b
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the baud rate to use on a serial line
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when configuring
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.BR PPP .
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.TP
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.B c
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write the control string
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.I ctl
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to the ethernet device control file before starting to configure it.
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May be repeated to specify multiple control writes.
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.TP
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.B d
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use DHCP to determine any unspecified configuration parameters.
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.TP
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.B D
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turn on debugging.
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.TP
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.B g
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the default gateway.
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.TP
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.B G
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2018-05-02 18:29:29 +00:00
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use only generic DHCP and RA options. Without this option,
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2011-03-30 13:49:47 +00:00
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.I ipconfig
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adds to requests a Vendor Class option with value
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.BI plan9_$ cputype
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and also requests vendor specific options 128 and 129 which we
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interpret as the Plan 9 file server and auth server.
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Replies to these options contain a list of IP addresses for possible
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file servers and auth servers.
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.TP
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.B h
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the hostname to add to DHCP requests. Some DHCP
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servers, such as the one used by Comcast, will not respond
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unless a correct hostname is in the request.
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.TP
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.B m
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the maximum IP packet size to use on this interface.
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.TP
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.B n
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determine parameters but don't configure the interface.
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.TP
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.B N
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look in
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2018-05-02 18:29:29 +00:00
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.I dbfile
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(default
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.BR /lib/ndb/local )
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2018-05-03 07:09:39 +00:00
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for the IP parameters for the specified
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.I local
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IP address or if
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.I local
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is omited and the device is an ethernet then all IP parameters
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2018-05-02 18:29:29 +00:00
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associated with the MAC address. IPv6 addresses are added only
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2018-05-03 07:09:39 +00:00
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if a IPv6 link-local address exists on the interface or the
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2018-05-02 18:29:29 +00:00
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.B 6
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flag has been given to automatically configure one.
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2011-03-30 13:49:47 +00:00
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.TP
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.B O
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addresses specified on the command line override those obtained via DHCP.
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A command line address of 0 implies no override.
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.TP
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.B p
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write configuration information to
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2018-05-03 07:09:39 +00:00
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.BR /net/ndb .
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2011-03-30 13:49:47 +00:00
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.TP
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.B P
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do not write configuration information to
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2018-05-03 07:09:39 +00:00
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.BR /net/ndb .
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2011-03-30 13:49:47 +00:00
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.TP
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.B r
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by default,
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.I ipconfig
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exits after trying DHCP for 15 seconds with no answer.
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This option directs
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.I ipconfig
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instead to fork a background process that keeps trying forever.
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.TP
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2022-03-13 17:29:16 +00:00
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.B t
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enable source address translation on the interface and default route.
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(only usefull for IPv4).
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.TP
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2011-03-30 13:49:47 +00:00
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.B u
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disable IPv6 duplicate discovery detection,
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which removes any existing ARP table entry for one of our IPv6 addresses
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before adding new ones.
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.TP
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2015-01-10 19:27:45 +00:00
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.B f
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use the ndb database file
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2018-05-03 07:09:39 +00:00
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.IR dbfile .
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2015-01-10 19:27:45 +00:00
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.TP
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2011-03-30 13:49:47 +00:00
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.B x
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use the IP stack mounted at
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.I netmtpt
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instead of at
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.BR /net .
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.TP
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.B X
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don't fork a process to keep the DHCP lease alive.
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.TP
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.B o
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adds
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.I dhcpoption
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to the list of paramters requested of the DHCP server. The
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result will appear in
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.B /net/ndb
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should this be the first interface. The known options are:
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.RS
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.LP
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.ft L
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arptimeout, baddr, bflen, bootfile, clientid, cookie, discovermask,
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discoverrouter, dns, dom, dumpfile, etherencap, extpath, finger,
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homeagent, impress, ipaddr, ipforward, ipgw, ipmask, irc, lease, log,
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lpr, maxdatagram, maxmsg, message, mtu, name, netbiosdds, netbiosns,
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netbiosscope, netbiostype, ni, nisdomain, nisplus, nisplusdomain,
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nntp, nonlocal, ntp, overload, params, pathplateau, pathtimeout,
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policyfilter, pop3, rebindingtime, renewaltime, rl, rootpath, rs,
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serverid, smtp, st, staticroutes, stdar, subnetslocal, supplymask,
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swap, sys, tcpka, tcpkag, tcpttl, tftp, time, timeoff, trailerencap,
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ttl, type, vendorclass, www, xdispmanager, xfont
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.RE
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.IP
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The options
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.BR ipmask ,
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.BR ipgw ,
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.BR dns ,
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.BR sys ,
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and
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.B ntp
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are always requested.
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.TF M
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.PD
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.PP
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If DHCP is requested, a process is forked
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off to renew the lease before it
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runs out. If the lease does run out, this
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process will remove any configured addresses
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from the interface.
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.PP
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.I Rip
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runs the routing protocol RIP.
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It listens for RIP packets on connected networks and
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updates the kernel routing tables.
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The options are:
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.TF M
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.PD
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.TP
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.B b
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broadcasts routing information onto the networks.
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.TP
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.B n
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gathers routing information but doesn't write to the
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route table. This is useful with
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.B \-d
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to debug a network.
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.TP
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.B x
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use the IP stack mounted at
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.I netmtpt
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instead of at
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.BR /net .
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.TP
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.B d
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turn on (voluminous) debugging.
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.PP
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.I Linklocal
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prints the IPv6 link-local address corresponding to the given
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.I mac
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address.
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Given
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.BR -t ,
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.I linklocal
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instead prints the
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.I 6to4
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EUI-64-based IPv6 address corresponding to
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.I mac
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and
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.I 6to4
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gateway
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.IR gwipv4 .
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.SH EXAMPLES
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Configure Ethernet 0 as the primary IP interface.
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Get all addresses via DHCP. Start up a connection server
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and DNS resolver for this IP stack.
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.IP
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.EX
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% bind -b '#l0' /net
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% bind -a '#I0' /net
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% ip/ipconfig
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% ndb/cs
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% ndb/dns -r
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.EE
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.PP
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Add a second address to the stack.
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.IP
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.EX
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% ip/ipconfig ether /net/ether0 add 12.1.1.2 255.255.255.0
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.EE
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.PP
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At Bell Labs, our primary IP stack is always to the company's internal
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firewall-protected network. The following creates an external
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IP stack to directly access the outside Internet. Note that the
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connection server uses a different set of
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.I ndb
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files. This prevents us from confusing inside and outside name/address
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bindings.
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.IP
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.EX
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% bind -b '#l1' /net.alt
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% bind -b '#I1' /net.alt
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% ip/ipconfig -x /net.alt -g 204.178.31.1 ether /net.alt/ether1\\
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204.178.31.6 255.255.255.0
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% ndb/cs -x /net.alt -f /lib/ndb/external
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% ndb/dns -sx /net.alt -f /lib/ndb/external
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% aux/listen -d /rc/bin/service.alt /net.alt/tcp
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.EE
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.PP
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Configure the IPv6 link-local address automatically
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and listen for router announcements.
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.IP
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.EX
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ip/ipconfig -6
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ip/ipconfig ra6 recvra 1
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.EE
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.SH FILES
|
2018-08-16 01:54:42 +00:00
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.B /sys/log/ipconfig
|
2011-03-30 13:49:47 +00:00
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.SH SOURCE
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.B /sys/src/cmd/ip/ipconfig
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.br
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.B /sys/src/cmd/ip/rip.c
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.br
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.B /sys/src/cmd/ip/linklocal.c
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.SH "SEE ALSO"
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.IR ether (3),
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.IR ip (3),
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.IR loopback (3),
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.IR ndb (6),
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.IR 6in4 (8),
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.IR dhcpd (8),
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.IR ppp (8)
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.br
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.B /lib/rfc/rfc2373
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for IPv6's modified EUI-64
|
