nanog mailing list archives

Re: Concerning MPLS paths


From: Saqib Ilyas <msaqib () gmail com>
Date: Tue, 28 Apr 2009 13:51:02 +0500

Anyone?


On Mon, Apr 27, 2009 at 6:15 PM, Saqib Ilyas <msaqib () gmail com> wrote:

Furthermore, I was also wondering, if the bandwidth constraints are upper
bounds, what does the traffic distribution typically look like at an LSR?
We're interested in traffic within a single service provider, non-Internet
traffic. Perhaps most service providers set aside some (dynamic?) pool for
Internet traffic, while making commitments to customer's inter-site traffic.
Thanks and best regards


On Mon, Apr 27, 2009 at 5:50 PM, Saqib Ilyas <msaqib () gmail com> wrote:

William
Thanks for the reply. You say that LSPs are not static unless you use TE
tunnels. Are you referring to the staticness in terms of the path or in the
amount of bandwidth reserved on each link along a fixed path determined at
the time of signalling? Isn't a bandwidth constrained LSP always a TE
tunnel?
Thanks and best regards


On Mon, Apr 27, 2009 at 5:41 PM, William McCall <william.mccall () gmail com
wrote:

Well, yes (if you don't count the additional traffic of
signalling/routing protocols, label imposition, etc) but consider the fact
that topologies change and routing will tend to change the total traffic
handled through a node. LSPs are not static unless you use TE tunnels.
Remember that labels are Forwarding Equivalency Classes and that translates
into subnets (whether they're subnets in a L3 vpn or part of the P network)
and the routing is still handled through an IGP or BGP.

HTH

--WJM IV


On Mon, Apr 27, 2009 at 7:10 AM, Saqib Ilyas <msaqib () gmail com> wrote:

Hello everyone
In the context of a single service provider network running MPLS, if a
number of bandwidth constrained LSPs are passing through a particular
node
and the sum of the bandwidth constraints for the LSPs is X Mb/s, then is
X
the upper bound on the traffic through that node, or is it sometimes
exceeded as well?
Thanks and best regards





--
Muhammad Saqib Ilyas
PhD Student, Computer Science and Engineering
Lahore University of Management Sciences




--
Muhammad Saqib Ilyas
PhD Student, Computer Science and Engineering
Lahore University of Management Sciences




-- 
Muhammad Saqib Ilyas
PhD Student, Computer Science and Engineering
Lahore University of Management Sciences


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