Re: [mpls-linux-general] basic questions about MPLS.

[Leigh P. <le...@bl...>]

Hiya,


Both Juniper (www.juniper.net) and Cisco (www.cisco.com) have some 
really good
documents about MPLS on their web sites. Yeah they are Cisco/Juniper 
specific but they
also do a good job of explaining what the advantages of MPLS are and how 
you can use it
for fun and for profit.

Whilst I am here, has anybody done any performance tests for MPLS on 
Linux using some
good testing kit? I would love to try it out against some 
Juniper/Cisco/Other boxes in the lab
but the company who had the lab made me redundant earlier this year :(

Thanks,
Leigh Porter

Folke Aeon wrote:

>
> in my opinion, the basic distinction between mpls
> and ip is that mpls is in layer 2.5 (a layer between
> the link layer and ip layer). but more technically,
> mpls is link-oriented switching technology, and ip
> is NOT link-oriented, which means that in ip network,
> you always gets a opsf routing protocol to route your
> packets, which mean that all packets will always
> intend to route from source to destination along
> the shortest path (which normally computed by
> dijkstra algorithm ), which will intend to cause
> congestion.
>
>  but in mpls network, which is a link oriented
> network, you can setup a pre-routed link between
> the source and the destination, and indeed , you
> can setup multi-links. thus you can do
> load-balance on all these links, which will
> avoid traffic congestion.
>
>  that's what i know :-), and wish it could do
> some help.
>
>  advice you to read the following for more technical
> info.:
> rfc2702(Requirements for Traffic Engineering Over MPLS)
> rfc3031(Multiprotocol Label Switching Architecture)
> rfc3037(LDP Applicability)
> rfc3209(extensions to rsvp for lsp tunnels)
> rfc3212(Constraint-Based LSP Setup using LDP)
> rfc3270(MPLS Support of Differentiated Services)
>
> you can get them at :
> http://www.ietf.org/rfc/rfcNNNN.txt
>
> where NNNN is the RFC number prefixed
> with zeroes as necessary to make a four
> digit number.
>
> have fun :)
>
>
>
> folke
>
>>
>> Message: 2
>> Date: Mon, 25 Nov 2002 12:48:59 -0500 (EST)
>> From: Ramesh Masavarapu <ra...@bo...>
>> To: mpl...@li...
>> Subject: [mpls-linux-general] basic questions about MPLS.
>>
>>
>> Hi,
>>   I would apprecitate if someone could help me why MPLS is being 
>> used?I am
>> lost as to where i could find descent enough information about this.
>> And if someone could explain me what major advantages MPLS has (in
>> comparison with techniques used in IP ,for e.g in the area of traffic
>> engineering), i would appreciate it a lot.
>> The questions i asked may sound dumb , but i am new to MPLS and would
>> appreciate any kind of help .
>>
>> thanks in advance
>> -Ramesh Masavarapu
>
>
>
>
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