The MPLS-OPS Archive

[Aditya M Thomas <addy@sasken.com>]

hi,

LDP operates on the control plane.It works at layer 4. Hence it is able 
to use UDP/TCP messages to exchage data with other LDP peers.

MPLS operates at the data plane.It works between layer 2 and 3. Once a 
LSP has been set up by LDP, data (and this includes subsequent LDP 
messages)  are switched by MPLS.

For an implementation of LDP you can look at 
http://sourceforge.net/projects/mpls-linux/ .

regards,
aditya.


Mohammed wrote:

> Hi all,
> 
>  I was confused about the layer on which LDP operates.
> As we all know MPLS operates between layer 2 and layer
> 3. 
> 
>  I am asking this because when a LDP session is
> established msgs are sent on TCP for reliable
> delivery.
> So for LDP to run over TCP it has to be implemented
> above that layer , but i am not sure where.
> 
>  Any pointers that help me in the implementation of
> LDP are welcome.
> 
>  Thanks for ur help!.
>  
>  Sincerely,
>  Abrar.
> 
> 
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-- 
Aditya Thomas,
Software Engineer,
Sasken Communication Technologies Ltd.,
Bangalore,India.
Tel:080-5355501 ext:8249

If you're careful enough, nothing bad or good will ever happen to you.

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