The MPLS-OPS Archive

["Jianghui Kang" <jianghui_kang@hotmail.com>]

Hi, just let me try.


>From: Mohammed <ipswitching@yahoo.com>
>To: mpls-ops@mplsrc.com
>CC: minsong@ieee.org
>Subject: [MPLS-OPS]: cr-lsp
>Date: Sun, 24 Mar 2002 12:11:35 -0800 (PST)
>
>Hi all,
>
>   I have a question related to constrained routed lsp
>setup using cr-ldp.
>
>  A cr-lsp is setup dynamically on demand and is setup
>for a flows or flows. Consider a flow generated by a
>host running IP and also consider that the flow
>requires a bandwidth of x bps. To establish a cr-lsp
>for such a flow, the host will first have to reserve a
>contrained path. Suppose the host gets the knowledge
>of such a path using some cspf algorithm.
>
>  Upon getting the path the source (host) needs to send
>the path establishment request to the nearest ingress
>LSR.
>
>  Question :
>
>(1) How do we guarantee end 2 end quality os service
>in such a case ?
the cr-ldp messages will contain traffic constraints and
reserve the needed resources
>(2) How is the request propagated to the nearest LSR
>so that the cr-lsp can be established ?
By the constraint-based routing calculation
>(3) How will the flow be treated when it leaves the
>MPLS domain ?
As normal IP packets
>  In short, how will the host inform the nearest
>ingress lsr about such a flow and path ?
It seems host can not control the establishment of LSPs
>Any pointers in this area are welcome.
>
>Please do correct me if i have mis interpreted some
>thing some where.
>
>Sincerely,
>Abrar Hussain.
>
>=====
>Abrar Hussain.
>Graduate Student/Network Designer.
>The University of Toledo.
>Toledo,OH.
>
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