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NAME    [Toc]    [Back]

     IPXrouted -- IPX Routing Information Protocol daemon

SYNOPSIS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     The IPXrouted utility 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 Advertising 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 controlling
 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 supplies
 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.	The IPXrouted utility then transmits a request packet on each
     interface (using a broadcast packet if the interface supports it) and
     enters a loop, listening for request and response packets from other

     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 sender.

     Response packets received by IPXrouted are used to update the routing
     tables 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 existing
 routing table entry.  That is, updated information is being
	 received 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
	 effective 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.  The routed(8) utility 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.

SEE ALSO    [Toc]    [Back]


HISTORY    [Toc]    [Back]

     The IPXrouted utility first appeared in FreeBSD 2.2.

FreeBSD 5.2.1		       October 11, 1995 		 FreeBSD 5.2.1
[ Back ]
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