= rip: routing information protocol

== SYNOPSIS

*ip/rip* [*-2*] [*-b*] [*-d*] [*-n*] [ **-x**__ mntpt__ ] [ _net_ ... ]
*&*


_Rip_ implements the Internet RIP routing protocol described by RFC1058
and RFC2453. It watches the network and makes appropriate changes to the
machine's Internet routing table (see *iproute* in _ip_(3)), based on
routing packets broadcast by gateways on the network. _Rip_ is only used
when a single default gateway is inadequate, typically because a machine
sits on a network directly connected to several others, having no common
gateway or router. On networks where there is just one gateway, it is
usually simpler and more efficient to configure that statically using
_ndb_(6) or dynamically using DHCP/BOOTP, rather than running _rip_.

_Rip_ serves the network on _mntpt_ (default: */net*). When it starts,
_rip_ learns its own interfaces and directly attached networks by
reading __mntpt__**/ipifc**_,_ and notes any routes currently in
__mntpt__**/iproute**_._

By default, _rip_ neither broadcasts routes nor replies to requests for
its route table. If the *-b* option is given, _rip_ periodically
broadcasts changes to its routing table to each of its interfaces. If at
least one explicit _net_ address is given, the broadcasts are restricted
to just the interfaces listed (and *-b* is implied).

The *-d* option causes _routed_ to record changes it makes to the
routing tables. This can be helpful when locating misleading
announcements from rogue gateways. A second *-d* will include detailed
information about every packet. The *-n* option tells _rip_ not to
change the local routing table, but only say what changes it would have
made.

_Rip_ understands both version1 and version 2 of the protocol, and
interprets updates from gateways appropriately. By default, it transmits
updates using version 1; if the *-2* option is given, it uses version 2
instead, which is preferable when the network has subnets.

== SOURCE

*/appl/cmd/ip/rip.b*

== SEE ALSO

_ip_(3), _ndb_(6)