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Topic: Policy based routing

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	RFC 1092 (rfc1092) - EGP and policy based routing in the new NSFNET backbo
		RFC 1092 - EGP and policy based routing in the new NSFNET backbone
		Introduction The NSFNET backbone routes packets between the Regionals Networks to which it is connected, (i.e., the packets arriving at a backbone entry node are routed to an exit node).
		Since the whole scheme is based on a combination of the network number and the autonomous system number, to allow for further verification, it is also important to insure the correctness of the autonomous system numbers as advertized by the regionals networks to the NSFNET core.
	www.faqs.org /rfcs/rfc1092.html (1527 words)

	Policy based routing - Wikipedia, the free encyclopedia
		It refers to a technique used to make routing decisions based on policies set by the network administrator.
		When a router receives a packet, it normally decides where to forward this packet to based on the destination address in the packet, which is then used to look up an entry in a routing table.
		Policy based routing may also be based on the size of the packet, the protocol of the payload, or some other characteristic.
	en.wikipedia.org /wiki/Policy_based_routing (265 words)

	RFC 1104 (rfc1104) - Models of policy based routing
		Overview To evaluate the methods and models for policy based routing, it is necessary to investigate the context into which the model is to be used, as there are a variety of different methods to introduce policies.
		Policy based distribution of routing information Goals: The goal of this model is to enforce certain flows by means of policy based distribution of routing information.
		Policy based packet filtering/forwarding Goals: The goal of the model of policy based packet filtering/forwarding is to allow the enforcement of certain flows of network traffic on a per packet basis.
	www.faqs.org /rfcs/rfc1104.html (3204 words)

	Policy based routing -- Facts, Info, and Encyclopedia article (Site not responding. Last check: )
		Policy-based routing (PBR) provides is a means of routing of data packets based on the policies defined by the network administrators.
		PBR can be set to override the routes that would other wise be selected using dynamic routing protocols.
		PBR allows routing policies to be implemented on the basis of the following parameters:-
	www.absoluteastronomy.com /encyclopedia/p/po/policy_based_routing.htm (62 words)

	Policy-Based Routing [IP Routing] - Cisco Systems
		Policy routing also provides a mechanism to mark packets so that certain kinds of traffic receive differentiated, preferential service when used in combination with queuing techniques enabled through the Cisco IOS software.
		Policy routing is specified on the interface that receives the packets, not on the interface from which the packets are sent.
		Policy routing also provides a mechanism to mark packets so that differentiated preferential service can be provided to types of traffic in combination with queuing techniques available in the Cisco IOS software.
	www.cisco.com /en/US/products/ps6599/products_white_paper09186a00800a4409.shtml (1902 words)

	Classless and policy-based routing
		A multi-homed routing domain may consist of single-site campuses and companies that are attached to multiple backbones, large organizations that are attached to different providers at different locations in the same country, or multi-national organizations that are attached to backbones in a variety of countries worldwide.
		The policy routing is defined as a mechanism to find out the route between the source and the destination, which satisfies the requirements on the quality of services.
		Based on the set of link state messages collected from other domains and on its domain's source and transit policies, a routing entity constructs and selects policy routes from its domain to other domains in the internet [16].
	www.tml.tkk.fi /Opinnot/Tik-110.551/1996/class_rout.html (4881 words)

	Citations: QoS-based Routing in Networks with Inaccurate Information - Gu'erin, Orda (ResearchIndex)
		Since the routing information updating policy is critical to network performance, a careful trade off between accuracy and scalability must be found.
		A routing failure is said to occur if the source cannot find a route based on link state information kept in its own database even if a qualified route exists.
		For all change based triggering policies, given the last known value of available bandwidth on a link b adv, it is possible to determine the range of values that the actual....
	citeseer.ist.psu.edu /context/219520/387584 (2024 words)

	[No title]
		Policy based routing MICRO-HOWTO Horacio J. Peña, horape@compendium.com.ar v0.03 05/Apr/2000 1.
		Routing by source This is probably the most used feature of policy routing.
		That's because the routing decissions are taken before the packet hits the forward rule (that's a assumption, i haven't read the code yet O:-) and of course before the output chain...
	www.compendium.com.ar /policy-routing.txt (1294 words)

	Pantek - Expert Linux and Open Source Services: : RFC #1104: Models of policy based routing. H.W. Braun. Jun-01-1989.
		Costs: Policy based routing in the NSFNET is implemented in a series of Braun [Page 3] RFC 1104 Models of Policy Based Routing June 1989 configuration files.
		If policies are contained in the packets themselves it could identify users, resulting in the ability of users to move between Braun [Page 4] RFC 1104 Models of Policy Based Routing June 1989 locations.
		Braun [Page 7] RFC 1104 Models of Policy Based Routing June 1989 This enforcement allows the control of access to scarce network resources (if the resource is not scarce, there is no performance reason to control access to it).
	www.pantek.com /library/general/rfc/rfc1104.html (3326 words)

	Policy Based Routing
		Normal routing can be said to be a simple form of policy based routing; the "policy" is the routing table, and the only data that can be filtered on is the destination IP address of the packet.
		What is commonly referred to as policy based routing, is, simply put, an extension of what fields of the packet we look at to determine the routing decision.
		As mentioned earlier, policy routing is done per state, which means that the rules in the PBR ruleset can specify which routing table to use in the forward as well as return direction.
	www.clavister.com /manuals/ver8.6x/manual/routing/policy_based_routing.htm (1445 words)

	Overcoming Asymmetric Routing on Multi-Homed Servers \| Linux Journal
		The kernel configuration scripts still label policy routing as NEW, but that is more a factor of the kernel help screens being updated slowly than a reflection on the maturity level of advanced and policy routing.
		A selection policy that matches the source address of an outgoing packet with the table that uses an interface that is in turn bound to that source address accomplishes our goal.
		Policies with a lower priority number take precedence over policies that also may match the candidate packet but have a higher priority value.
	new.linuxjournal.com /article/7291 (2463 words)

	Riverstone Networks Configuration Database: Policy Based Routing, Traffic Engineering & Recursive Lookup
		The configuration will demonstrate how policy based routing can be used to provide a level of traffic engineering.
		In order to properly demonstrate the affect of policy based routing it is suggested you use the following methodology when performing validation of the above.
		Policy-last means the policy will only be consulted in the event the routing table cannot resolved the next hop for a request.
	www.riverstonenet.com /support/configdb/0013.html (1086 words)

	Microsoft TechNet: Managing Network Services with Directory-Enabled Networking: The Cable Guy, February 2001
		Policy information includes a set of rules, structured as conditions and actions, for managing resources in the context of a specific realm of network management such as IP address management, quality of service (QoS), or security.
		A QoS policy can also include per-user settings—such as the number of flows allowed, the amount of peak rate bandwidth that can be requested, and the allowable bandwidth reservations (dependent upon the time of day)—that provide for the delivery of personalized QoS service.
		Policy-based routing also permits servicing critical, time-sensitive, or confidential information by special routes that are not available to other traffic.
	www.microsoft.com /technet/community/columns/cableguy/cg0201.mspx (1465 words)

	Constraint-Based Routing in the Internet: Basic Principles and Recent Research - Younis, Fahmy (ResearchIndex)
		Abstract: Novel routing paradigms based on policies, quality of service (QoS) requirements, and packet content have been proposed for the Internet over the last decade.
		Constraint-based routing algorithms select a routing path satisfying constraints which are either administrativeoriented (policy routing), or service-oriented (QoS routing).
		The routes, in addition to satisfying constraints, are selected to reduce costs, balance network load, or increase security.
	citeseer.ist.psu.edu /585571.html (1023 words)

	[No title] (Site not responding. Last check: )
		Policy-based routing supports traffic engineering by the computation of routes in the context of constraints on the type of traffic allowed over portions of an internet.
		Analogously, policy-based routing supports quality-of-service (QoS) by the computation of routes in the context of constraints on the paths specific traffic flows are allowed to use.
		A family of routing algorithms are presented for computing routes in the context of traffic-engineering constraints, quality-of-service constraints, and a combination of the two, which achieve new levels of computational efficiency.
	mambo.ucsc.edu /psl/cis_seminars/200305/20030528.html (268 words)

	Policy-Based Routing - PBR (Site not responding. Last check: )
		PBR is specified on interface which receives the packet, not which sends the packet.
		Policies may be based on IP address, ports, protocols, or size of packets.
		To each packet policy is determined according to the maps and they are forwarded according to the policy.
	www2.rad.com /networks/2001/qos/webpages/class/pbr.htm (277 words)

	rfc1500 - RFC - Know24.com - The Free Universal Encyclopedia and Learning Resource
		There may be several elective protocols in a general area, for example, there are several electronic mail protocols, and several routing protocols.
		However, both implementors and users should be aware that RIP has some serious technical limitations as a routing protocol.
		The IETF is currently developing several candidates for a new standard "open" routing protocol with better properties than RIP.
	www.know24.com /encyclopedia/rfc/rfc1500.html (5712 words)

	IP Policy (Site not responding. Last check: )
		Traditionally, routing is based on the destination address only and the router takes the shortest path to forward a packet.
		IP Policy Routing (IPPR) provides a mechanism to override the default routing behavior and alter the packet forwarding based on the policy defined by the network administrator.
		Policy-based routing is applied to incoming packets on a per interface basis, prior to the normal routing.
	www.zyxel.com /support/supportnote/p782/app/policy.htm (501 words)

	Sigcomm 2006 Form >> Policy-based Routing with Non-strict Preferences (Site not responding. Last check: )
		Traditional studies of routing problems often assumed strict preferences on paths, by eliminating ambiguity in path comparisons, or imposing a priori deterministic tie-breaking.
		In the presence of ambiguous preferences at pairs, or even multiple collections of paths, a challenge is to ensure robustness in the complex and sophisticated situations of policy-based routing where heterogeneous routing policies are allowed among routing systems.
		This paper presents an extensive study of policy-based routing with non-strict preferences, deriving suffient conditions that ensure the existence, optimality and asynchronous convergence of stable routings.
	sigcomm06.stanford.edu /discussion/showpaper.php?paper_id=35&PHPSESSID=77eb9856be2ee44069e7be61fd308d15 (333 words)

	[No title]
		In the first model, the requirements can be formulated at the Administrative Domain or network number level.
		The major difference is the level of enforcement: macroscopic level versus microscopic level control.
		In an internetworking environment, the heterogeneous administrative environment combined with the lack of end-to-end control may make this approach infeasible.
	www.ietf.org /rfc/rfc1104.txt (3278 words)

	Email Content Filtering - Email Policy Filtering
		The email content filtering gives administrators the ability to block messages based on words or phrases found in the message subject, message body as well as any attachments.
		The email policy filter allows administrators to block messages based on message size as well as number of recipients.
		Based on these two studies, the average employee spends 18.6 minutes each day dealing with junk e-mail.
	www.101domain.com /content_policy_filter.htm (211 words)

	Re: [squid-users] Squid + SLB + Transparent Mode (policy based routing) from Valton Hashani on 2004-02-25 (squid-users)
		Re: [squid-users] Squid + SLB + Transparent Mode (policy based routing) from Valton Hashani on 2004-02-25 (squid-users)
		Re: [squid-users] Squid + SLB + Transparent Mode (policy based routing)
		Subject: Re: [squid-users] Squid + SLB + Transparent Mode (policy based
	www.squid-cache.org /mail-archive/squid-users/200402/1037.html (322 words)

	RouterGod » Muhammed Saeed al-Sahaf On Policy Based Routing
		She caught up to him as he was looting an abandoned 7-11 convenience store and askedhim about policy based routing, let’s join Johna as she learns about PBR from MSS!
		So that other routers downstream can provide different service levels, or prioritize the packets based on what the precedence field is set to.
		The route map uses and access list to identify the traffic, it alters the precedence, routers downstream use access-lists to recognize these packets and Priority or Custom Queuing to put the packets in special queues.
	www.routergod.com /?p=27 (521 words)

	RFC 1482 (rfc1482): Aggregation Support in the NSFNET Policy-Based Routing Database - RFC Database - eLook.org
		Abstract This document describes plans for support of route aggregation, as specified in the descriptions of Classless Inter-Domain Routing (CIDR) [1] and the BGP-4 protocol [2], by the NSFNET Backbone Network Service.
		Mechanisms for exchange of route aggregates between the backbone service and regional/midlevel networks are specified.
		This memo describes Merit's plans for support of route aggregation on the NSFNET, and a proposal for implementing a database of aggregation information for use by network providers.
	www.elook.org /computing/rfc/rfc1482.html (271 words)

	Policy-Based Routing (Site not responding. Last check: )
		Because organizations need the freedom to implement packet forwarding and routing according to their own defined policies in a way that goes beyond traditional routing protocol concerns, policy-based routing is essential in configuring routers to specific needs.
		By using policy-based routing, policies that selectively cause packets to take different paths can be implemented.
		You will configure a router with EIGRP, enable policy-based routing, and configure route maps on the router’s interfaces to put this concept into practice.
	www.logilent.com /labs/lab054.html (103 words)

	Models of policy based routing (RFC1104)
		The purpose of this RFC is to outline a variety of models for policy
		To evaluate the methods and models for policy based routing, it is
		It is important to realize that the use of a policy based scheme for
	www.priorartdatabase.com /IPCOM/000001913 (332 words)

	Nanog 9405: Re: Additions to the NSFNET policy-based routing database
		together represent the global routing graph which is needed to answer
		routing policies in case something affecting them happens elsewhere.
		Merit is running the same stuff for their new generic routing registry.
	www.irbs.net /internet/nanog/9405/0019.html (491 words)

	IP PBX, Asterisk-based PBX and VoIP PBX Phone Systems :: Fonality
		Some of Fonality's products are "based on Asterisk", by which we mean that Fonality has modified the native Asterisk code to add reliability, stability and enterprise-class features.
		In addition, since most people prefer to manage their business and not their phone system, Fonality has built five distinct value layers over the technology that Asterisk (both the native version from Digium and the modified version that comes with PBXtra) delivers at its core.
		Fonality has written extensive code which ensures that your PBXtra (Asterisk based IP PBX) is a good citizen of your LAN.
	www.fonality.com (967 words)

	RiverDelta Networks Intros Distributed Policy-Based Routing With MPLS Per-Flow Control For Scalable Open Access
		Until now policy-based routing implementations have been software-based and centralized, enabling operators to trial multiple ISP access but not to scale the system for actual deployment.
		The BSR 64000 supports carrier-class routing protocols as well as sourced-based distributed policy routing and MPLS, which provides scalability as operators add new services, subscribers and partners to their network.
		The BSR 64000 with distributed policy-based routing and MPLS per-flow control is currently undergoing full-system testing at George Mason University laboratories and interoperability testing at the University of New Hampshire's InterOperability Lab.
	www.tmcnet.com /enews/040201f.htm (1248 words)

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