Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
IPXROUTED(8)		  BSD System Manager's Manual		  IPXROUTED(8)

     IPXrouted -- IPX Routing Information Protocol daemon

     IPXrouted [-N] [-q] [-s] [-S] [-t]	[logfile]

     IPXrouted is invoked at boot time to manage the IPX routing tables.  The
     IPX routing daemon	uses the Novell	IPX Routing Information	Protocol in
     maintaining up to date kernel routing table entries.

     Available options:

     -N	      Do not reply on GetNearestServer SAP request.

     -q	      Do not supply routing information	(opposite of -s	option below).

     -s	      Forces IPXrouted to supply routing information whether it	is
	      acting as	an internetwork	router or not.

     -S	      Do not supply Service Advertizing	Protocol (SAP) information.
	      The default is to	supply SAP information.

     -t	      All packets sent or received are printed on the standard output.
	      In addition, IPXrouted will not divorce itself from the control-
	      ling terminal so that interrupts from the	keyboard will kill the

     logfile  Name of file in which IPXrouted's	actions	should be logged.
	      This log contains	information about any changes to the routing
	      tables and a history of recent messages sent and received	which
	      are related to the changed route.

     In	normal operation IPXrouted listens for routing information packets.
     If	the host is connected to multiple IPX networks,	it periodically	sup-
     plies copies of its routing tables	to any directly	connected hosts	and

     When IPXrouted is started,	it uses	the SIOCGIFCONF	ioctl(2) to find those
     directly connected	interfaces configured into the system and marked "up"
     (the software loopback interface is ignored).  If multiple	interfaces are
     present, it is assumed the	host will forward packets between networks.
     IPXrouted then transmits a	request	packet on each interface (using	a
     broadcast packet if the interface supports	it) and	enters a loop, listen-
     ing for request and response packets from other hosts.

     When a request packet is received,	IPXrouted formulates a reply based on
     the information maintained	in its internal	tables.	 The response packet
     generated contains	a list of known	routes,	each marked with a "hop	count"
     metric (a count of	16, or greater,	is considered "infinite").  The	metric
     associated	with each route	returned provides a metric relative to the

     Response packets received by IPXrouted are	used to	update the routing ta-
     bles if one of the	following conditions is	satisfied:

     +o	 No routing table entry	exists for the destination network or host,
	 and the metric	indicates the destination is ``reachable'' (i.e. the
	 hop count is not infinite).

     +o	 The source host of the	packet is the same as the router in the	exist-
	 ing routing table entry.  That	is, updated information	is being re-
	 ceived	from the very internetwork router through which	packets	for
	 the destination are being routed.

     +o	 The existing entry in the routing table has not been updated for some
	 time (defined to be 90	seconds) and the route is at least as cost ef-
	 fective as the	current	route.

     +o	 The new route describes a shorter route to the	destination than the
	 one currently stored in the routing tables; the metric	of the new
	 route is compared against the one stored in the table to decide this.

     When an update is applied,	IPXrouted records the change in	its internal
     tables and	generates a response packet to all directly connected hosts
     and networks.  Routed(8) waits a short period of time (no more than 30
     seconds) before modifying the kernel's routing tables to allow possible
     unstable situations to settle.

     In	addition to processing incoming	packets, IPXrouted also	periodically
     checks the	routing	table entries.	If an entry has	not been updated for 3
     minutes, the entry's metric is set	to infinity and	marked for deletion.
     Deletions are delayed an additional 60 seconds to insure the invalidation
     is	propagated to other routers.

     Hosts acting as internetwork routers gratuitously supply their routing
     tables every 30 seconds to	all directly connected hosts and networks.

     If	IPXrouted receives a SIGINFO signal the	current	contents of the	RIP
     and SAP tables are	appended to the	file /var/log/ipxrouted.dmp.


BSD			       October 11, 1995				   BSD


Want to link to this manual page? Use this URL:

home | help