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	4.8. Routing Tables
		By allowing multiple traditional routing tables (keyed primarily to destination address) to be combined with the routing policy database (RPDB) (keyed primarily to source address), the kernel supports a well-known and well-understood interface while simultaneously expanding and extending its routing capabilities.
		Aside from the local routing table, which is maintained by the kernel, and the main routing table which is partially maintained by the kernel, all routing tables are controlled by the administrator or routing software.
		The throw route type is a convenient route type which causes a route lookup in a routing table to fail, returning the routing selection process to the RPDB.
	linux-ip.net /html/routing-tables.html (1581 words)

	What is Routing
		Routing is the act of moving information across an internetwork from a source to a destination.
		A routing domain generally is considered to be a portion of an internetwork under common administrative authority that is regulated by a particular set of administrative guidelines.
		Routing algorithms must be robust, which means that they should perform correctly in the face of unusual or unforeseen circumstances, such as hardware failures, high load conditions, and incorrect implementations.
	www.pulsewan.com /data101/routing_basics.htm (2733 words)

	Routing Basics
		Routing is often contrasted with bridging, which might seem to accomplish precisely the same thing to the casual observer.
		The routing update message is one such message that generally consists of all or a portion of a routing table.
		Routing delay refers to the length of time required to move a packet from source to destination through the internetwork.
	www.ictglobal.com /ICT009/routing_basics.html (1151 words)

	routing(7)
		A routing table consists of a set of data structures used by the network facilities to select the appropriate remote host or gateway when transmitting packets.
		A routing table entry is considered a match, if the result of the bit-wise AND operation between the netmask in the routing entry and the IP packet's destination address equals to the destination address in the routing entry.
		For example, the host route entry that has a destination/netmask pair of (147.253.56.1, 0xffffffff), is more specific than the network route entry that has a destination/netmask pair of (147.253.56.0, 0xfffffe00), therefore the network facilities select the host route entry.
	docs.hp.com /en/B9106-90013/routing.7.html (1176 words)

	4.5. Route Selection
		With this knowledge of the RPDB and multiple routing tables, let's revisit in detail the method by which the kernel selects the proper route for a packet.
		If no matching entry is found in the specified routing table, the kernel will pass to the next rule in the RPDB, until it finds a match or falls through the end of the RPDB and all consulted routing tables.
		Failing a route lookup in the main routing table the final rule (32767) instructs the kernel to perform a route lookup in table 253.
	linux-ip.net /html/routing-selection.html (1277 words)

	RCS/4000 Admin Guide Appendix B: Routing
		Routers find the best route for data sent to them by the previous router or the end station of the LAN; but because routers are protocol dependent, they have to do more data processing than bridges and they do not have a bridge's ability to determine addresses.
		Indirect routing occurs when the destination is not on a directly attached network, requiring the sender to pass the IP datagram to a gateway for delivery.
		A default route is a "fall-back" mechanism for instances when no appropriate destination network address appears in the routing table.
	www.systech.com /support/rcs4kagg/rcs4kg-19.htm (1141 words)

	AATools Network Monitor - IP Routing Table
		Routes are updated periodically in response to traffic conditions and availability of a route.
		Note that LOCAL refers to a route for which the next hop is the final, REMOTE refers to a route for which the next hop is not the final destination.
		Routes that were originally generated by a routing protocol, but which are now static.
	www.glocksoft.com /netmon_iprouting.htm (887 words)

	Routing - Wikipedia, the free encyclopedia
		Routing directs forwarding, the passing of logically addressed packets from their source network, toward their ultimate destination through intermediary nodes; typically hardware devices called routers.
		Routing differs from bridging in its assumption that address-structures imply the proximity of similar addresses within the network, thus allowing a single routing-table entry to represent the route to a group of addresses.
		Routed protocol ;: Any network protocol that provides enough information in its network layer address to allow a packet to be forwarded from one host to another host based on the addressing scheme, without knowing the entire path from source to destination.
	en.wikipedia.org /wiki/Routing (1388 words)

	Routing
		The routing table for machine a gateway for the network 192.168.2.0 to be routed to network 192.168.1.0 is as follows.
		Routed will listen for RIP updates on the network and use them to build a routing table.
		The /etc/gateways file allows static routes to be added to the routed daemon so that routes associated with routers that can't provide updates to routing tables are manually provided for.
	www.comptechdoc.org /os/linux/usersguide/linux_ugrouting.html (1275 words)

	Juniper Routing Policy and Firewall Filters > Policy Terminology (Site not responding. Last check: 2007-11-03)
		You can configure routing policies to control which routes the routing protocols place in the routing tables and to control which routes the routing protocols advertise from the routing tables (see Figure 8.2).
		You can also use routing policies to change specific route characteristics, which allow you to control which route is selected as the active route to reach a destination, to effect changes to the default BGP route flap-damping values, to perform per-packet load balancing, and to enable class of service (CoS).
		If an incoming or outgoing route or packet arrives and an explicitly configured policy related to the route or to the interface upon which the packet arrives is not configured, the action specified by the default policy is taken.
	www.informit.com /articles/article.asp?p=30666 (1426 words)

	Routing Tables (Site not responding. Last check: 2007-11-03)
		Routing tables can take many forms, but here is a simple model that can explain most Internet routing.
		If no routing table entries match a packet's Destination Address, the packet is discarded as undeliverable (possibly with an ICMP notification to the sender).
		The default route will only be used if there are no others matches in the routing table, thus its name.
	www.freesoft.org /CIE/Topics/116.htm (364 words)

	How routing works
		A routing daemon that both broadcasts its routing tables and listens for broadcasts from other routers is termed ``active''.
		In this case, the daemon is configured to listen for broadcasts and update its local routing table; it does not broadcast to other machines.
		When a machine wishing to send an IP packet to a second machine must send that packet through a third machine, the route the packet will travel is said to be an ``indirect route'' and the selection of the intermediary machine is called ``indirect routing''.
	docsrv.sco.com /NET_tcpip/iproutingN.how_works.html (629 words)

	Routing Overview
		A common implementation of this is using a route to Null0 with an administrative distance of 250 to simply hold a route until another routing protocol with a higher administrative distance overrides the route.
		Routing flaps are routes that change from active to inactive very quickly, usually because of a bouncing circuit.
		Route announcements that do not coincide with a registered route or are not registered with the RADB will not be visible to most of the Internet.
	networking.ringofsaturn.com /IP/Routing.php (6127 words)

	Routing (Linktionary term)
		A historical perspective on the development of routing on the Internet is referenced under "Routing on the Internet." Also note that this topic covers IP routing, although other routable protocols such as IPX (Internetwork Packet Exchange) exist.
		This information is quite succinct and often consists of a single routing table entry (for external routers) that represents all of the internal networks on the other side of the border router.
		The first few packets are initially routed, but if a long flow is detected, the ATM address of the destination is obtained by the source, which then sets up a virtual connection across the ATM fabric directly to the destination, switching all subsequent packets and bypassing the routers.
	www.linktionary.com /r/routing.html (1959 words)

	Routing Basics
		Routing protocols use metrics to evaluate what path will be the best for a packet to travel.
		A metric is a standard of measurement, such as path bandwidth, that is used by routing algorithms to determine the optimal path to a destination.
		Routing algorithms can be programmed to adapt to changes in network bandwidth, router queue size, and network delay, among other variables.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/routing.htm (2966 words)

	Routing
		Routing is the main process used by Internet hosts to deliver packets.
		Internet uses a hop-by-hop routing model, which means that each host or router that handles a packet examines the Destination Address in the IP header, computes the next hop that will bring the packet one step closer to its destination, and delivers the packet to the next hop, where the process is repeated.
		Routing protocols form the core of the hacker's Internet, because it is here that all the decisions get made.
	www.freesoft.org /CIE/Topics/87.htm (229 words)

	IP Routing
		The flush timer — the time that passes before a route is flushed from the routing table — defaults to seven times the routing update period.
		DUAL uses distance information to select routes for insertion in a routing table based on feasible successors -- a least-cost path to a destination that is guaranteed not to be part of a routing loop.
		Routing between ASs is handled using Exterior Gateway Protocols (EGPs) by edge routers (so named because they are at the edge or border of its AS).
	www.wilsonmar.com /1routing.htm (3394 words)

	Convergence of Routing Tables (Linktionary term)
		These routing tables are created dynamically by obtaining neighbor and route information from other routers.
		Routes may be added or removed, or routes may fail due to a break in the physical link.
		Once all the routers in the network have updated their routing tables, convergence is complete.
	www.linktionary.com /c/converge_routing.html (260 words)

	Route - Manipulate network routing tables
		Route packets of network traffic from one subnet to another by modifying the route table.
		If this is used in conjunction with one of the commands, the tables are cleared prior to running the command.
		Note that routes added to the table are not made persistent unless the -p switch is specified.
	www.ss64.com /nt/route.html (273 words)

	Fax2Send Configuration - Routing Tables (Site not responding. Last check: 2007-11-03)
		routing is always used when a new fax message is received and can route a message to a printer, email address or InTray.
		Note that use of this table is controlled by the InTrays parameter in the config file.
		It is normally used to route messages into one of the InTrays from where they are sorted by an operator or to print every message to the same printer.
	www.fax2send.com /fax2send/page/config_routing.html (410 words)

	Routing Tables (Site not responding. Last check: 2007-11-03)
		These tables constantly change as network traffic and conditions change, so that they always route data the most efficient way possible, taking into account the current state of traffic on the intranet.
		Dynamic routing tables are built using routing protocols.
		A router with a dynamic routing table can automatically switch data to a backup route if the primary route is down.
	www.suite101.com /article.cfm/intranets/38205 (441 words)

	Making sense of Windows routing tables (Site not responding. Last check: 2007-11-03)
		Routing tables dictate the flow of packets from the machine in question.
		The routing tables are an important part of Windows' TCP/IP protocol stack, but they aren't something that the operating system normally displays to the casual user.
		The final column in the routing table is the Metric column.
	whatis.techtarget.com /tip/1,289483,sid7_gci1150941,00.html (1970 words)

	TCP/IP Routing
		Routers make use of routing tables to keep track of the IP addresses of other networks, including other routers and servers.
		The algorithm used to determine routes is not prone to the looping problems of RIP and is more efficient even though larger databases of information arise.
		This sort of hierarchy reduces the size of routing tables and reduces the time spent recalculating routes when changes are made.
	esaighu.net /networking/routing.htm (834 words)

	NVNS - ns with NixVectors
		A NixVector (Neighbor-Index Vector) is a form of source routing that can retain and use a complete routing path from a source to a destination is a very compact form.
		Instead of computing all-pairs routes, a NixVector is computed from a source to a destination on demand, when a packet is generated at the source.
		The NixVector routing method has the advantages of the ns hierarchical routing, without the necessity of a structured topology, and with no additional effort on the part of the ns user.
	www-static.cc.gatech.edu /computing/compass/nvns (665 words)

	Routing Tables
		A DOCLINE library's routing table contains nine hierarchical cells, each of which may contain the LIBIDs of up to 20 libraries, with no more than 180 in your table.
		For each request entered, the system will automatically route it to all libraries within a cell that match the criteria of the Serial Holindings before proceeding to the next cell, if it remains unfilled.
		If the prefixed library is not able to fill the request, automatic routing will take over in cell 1 of the routing table.
	nnlm.gov /gmr/resourcesharing/routingtables.html (273 words)

	Setting the Tables Straight: Routing Table Revisions (Site not responding. Last check: 2007-11-03)
		The Routing Table Change Request Form, an annotated copy of your current routing table, and a list of additions to your routing table should be returned to PSRML.
		On the Routing Table Change Request Form, fill in the blank table, indicating the way the final routing table is to appear.
		This table is used as a proof sheet, to verify that changes made to your routing table have resulted in the placement of librar ies in the appropriate cells.
	nnlm.gov /psr/lat/v6n3/routrevi.html (440 words)

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