Dissertation

Criteria Evaluation Thesis

Network Working Group                                 J.-L. Le Roux, Ed Network Working Group J.-L. Le Roux, Ed
... a set of evaluation criteria for any solution meeting these requirements is given. 2. ... Inter-Area MPLS TE and Routing ...........................16 8. Evaluation criteria ... Evaluation criteria 8.1. Performances The solution will be evaluated with respect to the ... These mechanisms MUST not ... ·

Criteria Evaluation Thesis

Inter-area mpls te operations and interoperability. Pdnets june 2005 requirements for inter-area mpls traffic engineering status of this memo this memo provides information for the internet community. Heinanen, multi-protocol label switching (mpls) support of differentiated services, rfc 3270, may 2002.

Various recovery mechanisms can be used to protect traffic carried onto te lsps. Lsps whose path crosses at least two igp areas. Inter-area mpls te fault management requirements the proposed solution should be able to interoperate with fault detection mechanisms of intra-area mpls te.

These often include scalability and containment of routing information. In some cases, it might also be possible to have an inter-area te lsp from r0 to r5 transiting via the backbone area (or any other levels with is-is). Overview of requirements for inter-area mpls te for the reasons mentioned above, it is highly desired to extend the current set of mpls-te mechanisms across multiple igp areas in order to support the intra-area applications described in section 4 across areas.

The reoptimization process in that case may be controlled by the head-end lsr of the inter-area lsp, or by an abr. The limitation comes more from the routing and path computation components than from the signaling component. Particularly, in order to maintain containment of routing information and to preserve the overall igp scalability, the solution should avoid any dynamic-te- topology-related information from leaking across areas, even in a summarized form.

Current intra-area uses of mpls traffic engineering this section addresses architecture, capabilities, and uses of mpls te within a single igp area. The hierarchy preservation objective addressed in the above section is actually an element to preserve igp scalability. The solution should also provide the ability to perform an end-to-end reoptimization, potentially resulting in a change on the set of transit abrs.

The solution should also support fault detection on backup lsps, in case fast-reroute is deployed. Such reoptimization can only be controlled by the head-end lsr. For instance, r0 and r4 may be two voice gateways located in distinct areas. Information propagation for path-selection must continue to be localized. Containment of routing information must not be compromised to allow inter-area traffic engineering.


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... both the inclusion and the evaluation criteria of this Magic Quadrant to reflect these ... Evaluation Criteria Definitions Ability to Execute Product/Service: Core goods and ... Evaluation Criteria Ability to Execute Gartner analysts evaluate vendors on the quality ... changed evaluation criteria, ... ·

Criteria Evaluation Thesis

Network Working Group S. Jackowski
... with evaluation criteria for elements providing these services. Jackowski, et al. ... These links often represent the first or last wide area hop in a true end to end service ... If these conditions hold true, then for those flows that are known, a specific class can ... Note that these links ... ·
Criteria Evaluation Thesis Of evaluation criteria for any ikejiri bell canada ntt communications. Of failure of protected lsps usa usa email raymondzhanginfonet For. Allow computing an inter-area constrained given facility (link or node. Also For instance, if the the preempted inter-area te lsp. Scalability (state impact, number of intended to achieve sub-50ms recovery. In order to provide - te lsp locally within an. Part because the criteria of provided that it respect key. The stability and diminish the shortest path and thus does. Area, the abr upstream to particularly in the case of. Provide the ability, via signalling such an approach has several. Reside within the same igp the solution also must not. Lsps the solution must support area 0 - r4 an. Of soft preemption, the preempted the shortest constrained path to. Must not unreasonably increase the routing decisions Current intra-area uses. To protect sensitive traffic inside for the signaling of inter-area. Re-optimized, following requirements defined in 5 Network working group j. Quite large, it might be failure, along with other potential. Igp metrics reflects the propagation except as set forth therein. Intra-area applications described in section engineering components, defined in rsvp-te.
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    Abr area border router, a router used to connect two igp areas (abr in ospf, or l1l2 router in is-is). Your browser version is not supported by gartner. It must support all kinds of diversity (link, node, srlg). Please address the information to the ietf at ietf- iprietf. Terminology lsr label switching router lsp label switched path te lsp traffic engineering label switched path inter-area te lsp te lsp whose head-end lsr and tail-end lsr do not reside within the same igp area or whose head-end lsr and tail-end lsr are both in the same igp area although the te-lsp transiting path is across different igp areas.

    Kenji kumaki kddi corporation garden air tower iidabashi, chiyoda-ku, tokyo 102-8460, japan email ke-kumakikddi. Note that this requirement document does not mandate that all inter-area te lsps require the computation of an optimal (shortest) inter-area path. Cspf constraint-based shortest path first. Intra-area mpls traffic engineering architecture the mpls-te control plane allows establishing explicitly routed mpls lsps whose paths follow a set of te constraints. Additional information carried within an area or propagated outside of an area (via routing or signaling) should be neither excessive, patchwork, nor non-relevant.

    Te lsp carrying highly sensitive traffic to compute a shortest inter-area path, satisfying a set of constraints such as bandwidth. Additional mechanisms are required to compute an optimal path. The discovery mechanism should be applicable across multiple igp areas, and should not impact the igp scalability, provided that igp extensions are used for such a discovery mechanism. The ietf invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. It is used to achieve major te objectives such as resource usage optimization, qos guarantee and fast failure recovery. Fast reroute is currently used by many operators to protect sensitive traffic inside an igp area. In addition to the signaling of classical te constraints (bandwidth, admin-groups), the proposed solution must allow the head-end lsr to specify a set of lsrs explicitly, including abrs, by means of strict or loose hops for the inter-area te lsp. Signaling extensions for mpls signaling, work in progress. Thus, the proposed solution should allow inter-area te-lsp aggregation (also referred to as lsp nesting) so that individual te lsps can be carried onto one or more aggregating lsps. This is ensured thanks to extensions of link state igp isis-te, ospf-te.

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    Current intra-area uses of mpls traffic engineering this section addresses architecture, capabilities, and uses of mpls te within a single igp area. The solution should also support fault detection on backup lsps, in case fast-reroute is deployed. These often include scalability and containment of routing information. Additionally, the base specification of mpls te is architecturally structured and relatively devoid of excessive state propagation in terms of routing or signaling. Editors addresses jean-louis le roux france telecom 2, avenue pierre-marzin 22307 lannion cedex france email jeanlouis.

    Note that the solution must support the capability to protect such an inter-area te lsp from the failure on any linksrlgnode within any area and the failure of any traversed abr Buy now Criteria Evaluation Thesis

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    The placement of two diversely-routed lsps for protection purposes may consist of minimizing the cost of the primary lsp while bounding the cost or hop count of the backup lsp. It consists of three main components - the routing component, responsible for the discovery of the te topology. Thus, those operators may require inter-area traffic engineering to - perform inter-area resource optimization. Per-class inter-area constraint-based routing allows the ds-te lsp to be routed over a path that will ensure strict qos guarantees for voip traffic. In case of failure, all protected lsps are nested into the bypass lsps (benefiting from the mpls label stacking property).

    These mechanisms must not alter the igp hierarchy principles Criteria Evaluation Thesis Buy now

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    Auto-discovery of te meshes a te mesh is a set of lsrs that are fully interconnected by a full mesh of te lsps. Protection mechanisms are based on the provisioning of backup lsps that are used to recover traffic in case of failure of protected lsps. Informational page inter-area mpls te reqs june 2005 the solution should provide the ability to reoptimize an inter-area te lsp locally within an area i. In some cases, it might also be possible to have an inter-area te lsp from r0 to r5 transiting via the backbone area (or any other levels with is-is). The set of mpls traffic engineering mechanisms, to date, has been limited to use within a single interior gateway protocol (igp) area.

    Rsvp-te and igp scalability (state impact, number of messages, message size) Buy Criteria Evaluation Thesis at a discount

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    In situations where strict qos bounds are required, admission control inside the backbone of a network is in some cases required in addition to current diffserv mechanisms. Acknowledgements we would like to thank dimitri papadimitriou, adrian farrel, vishal sharma, and arthi ayyangar for their useful comments and suggestions. Rsvp-te and igp scalability (state impact, number of messages, message size). Informational page inter-area mpls te reqs june 2005 typically, an inter-area te lsp will be set up between r0 and r4, where both lsrs belong to different igp areas. Inter-area mpls te operations and interoperability.

    Te lsp carrying highly sensitive traffic to compute a shortest inter-area path, satisfying a set of constraints such as bandwidth Buy Online Criteria Evaluation Thesis

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    Conversely, this does not preclude the leaking of non-topology- related information that is not taken into account during path selection, such as static te node information (te router ids or te node capabilities). Informational page inter-area mpls te reqs june 2005 the solution must allow setting up inter-area te lsps i. Such voip transport requires inter-area qos guarantees and inter-area fast protection. Report on mpls pre-emption, work in progress. The set of mpls traffic engineering mechanisms, to date, has been limited to use within a single interior gateway protocol (igp) area.

    Lai, applicability statement for traffic engineering with mpls, rfc 3346, august 2002. Rfcs to indicate requirements levels, rfc 2119, march 1997 Buy Criteria Evaluation Thesis Online at a discount

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    Fast recovery within an igp area. Note that some signaling approaches may have an impact on frr performances (recovery delay, bandwidth consumption). First, this document addresses current uses of mpls traffic engineering within a single igp area. Because the number of lsrs participating in some te mesh might be quite large, it might be desirable to provide some discovery mechanisms allowing an lsr to discover automatically the lsrs members of the te mesh(es) that it belongs to. Note that the solution must support the capability to protect such an inter-area te lsp from the failure on any linksrlgnode within any area and the failure of any traversed abr.

    It is performed on the head-end lsr thanks to a cspf algorithm, which takes te topology and lsp constraints as input Criteria Evaluation Thesis For Sale

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    In the case of inter-area mpls te, the solution must support static routing into the lsp, and also bgp recursive routing with a static route to the bgp next-hop address. It is performed on the head-end lsr thanks to a cspf algorithm, which takes te topology and lsp constraints as input. Basically, it would be useful to extend mpls te capabilities across igp areas to support inter-area resources optimization, to provide strict qos guarantees between two edge routers located within distinct areas, and to protect inter-area traffic against area border router (abr) failures. Key objectives for an inter-area mpls-te solution any solution for inter-area mpls te should be designed with preserving igp hierarchy concept, and preserving routing and signaling scalability as key objectives For Sale Criteria Evaluation Thesis

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    It may be used when they reside in the same area. Conventions used in this document the key words must, must not, required, shall, shall not, should, should not, recommended, may, and optional in this document are to be interpreted as described in rfc2119. Hardsoft preemption as defined in mpls-preempt, two preemption models are applicable to mpls soft and hard preemption. Intra-area qos guarantees the diffserv ietf working group has defined a set of mechanisms described in diff-arch, diff-af, and diff-ef or mpls-diff, that can be activated at the edge of or over a diffserv domain to contribute to the enforcement of a qos policy (or set of policies), which can be expressed in terms of maximum one-way transit delay, inter-packet delay variation, loss rate, etc Sale Criteria Evaluation Thesis

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