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Fwd: pre-emptive routing

  • From: Irwin Lazar <ilazar@mplsrc.com>
  • Date: Tue, 21 Aug 2001 19:01:36 -0400
  • Resent-Date: Tue, 21 Aug 2001 19:41:18 -0400
  • To: mpls-ops@mplsrc.com
  • X-Sender: ilazar@mplsrc.com


>To: mpls-ops@mplsrc.com
>From: Gary Zielke <gzielke@infotel-systems.com> (by way of MPLS Resource 
>Center <admin@mplsrc.com>)
>Subject: pre-emptive routing
>X-Envelope-To: mpls-ops
>
>Hello Everyone
>
>The draft for Constraint-Based LSP Setup using LDP states that LSPs can be 
>pre-empted by higher priority LSPs and that existing LSPs may be re-routed 
>as a result of the pre-emption.  Apart from saying that bumping is an 
>aspect of local policy how an alternate route is selected does not seem to 
>be specified.  Is this purely a manual process or is the intent to 
>automate the procedure? The ability to re-route also implies that an LSP 
>that fails because of lack of resources could be re-routed.  This sounds 
>something like crankback in ATM PNNI routing.  Does anyone have any 
>insights here.
>
>Thanks
>
>Gary Zielke
>
>Gary Zielke
>Infotel Systems Corp.
>Phone: (604) 596-9744
>FAX:    (604) 597-8994

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