Concerning MPLS paths

Saqib Ilyas msaqib at gmail.com
Mon Apr 27 08:15:33 CDT 2009


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 at 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 at 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 at 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



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