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MPLS/"Best Effort" Bandwidth Contention

  • From: stephen mullaney <stephen.mullaney@parc-technologies.com>
  • Date: Wed, 30 Jan 2002 11:14:19 -0000
  • Resent-Date: Wed, 30 Jan 2002 07:03:34 -0500
  • To: "'mpls-ops@mplsrc.com'" <mpls-ops@mplsrc.com>

Title: MPLS/"Best Effort" Bandwidth Contention

Hi there,

This may be a Cisco specific question, but....

For a given link which carries both a MPLS guaranteed tunnel and some "best effort" non-MPLS traffic how is the bandwidth constraint for the tunnel enforced.

eg if the tunnel is 20M and the link is 100M, I assume that if no other traffic is on the link, the tunnel can use more than the 20M assigned to it.  But when "best effort" traffic starts to traverse the link, how are the two types of traffic treated. Is the MPLS traffic pushed-down to its bandwidth guarantee as the best-effort increases? Do both types of traffic get the same treatment/queuing? What is the algorithm for differentiation? etc?

Thanks
Stephen