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Edge LSR

  • From: "gosh larous" <glarous@yahoo.com>
  • Date: Thu, 28 Jun 2001 16:08:25 +0430
  • Resent-Date: Thu, 28 Jun 2001 08:37:38 -0400
  • To: <mpls-ops@mplsrc.com>
  • X-Apparently-From: <glarous@yahoo.com>

Thanks Hemant
 
I am trying to simulate an MPLS network with NS. But in NS I think every LSR are the same and there is no difference between LER & LSR. Do you know any implementation of MPLS which the difference between LER and LSR has been considered in it.
 
Thank in advance
Gosh
 
----- Original Message -----
From: "Hemant P. Kelkar" <hemant@cyberspace.org>
Sent: Thursday, June 28, 2001 3:18 PM
Subject: Re :

> Hi Gosh,
>
> LSRs(Label Switchng Routers) are mostly divided in two categories: Edge
> LSR
> (called LER too - Label Edge Router), and Core LSR.  Core LSR does only
> label-swaps most of the times, and sometimes swap and push and Pop too.
> Edge LSRs (i.e. LER) mostly map FEC to Label and are directly connected to
> L3 world ( IP networks mostly). LERs connect two different networks, while
> core LSRs are less intelligent and are inside the core network.
> Hope that answers your question.
> --
> Hemant
>
>
> ------------------------------------------------------------
> Hi all,
>
> I am studing MPLS protocol and documents. I am a bit
> confused by the types of LSR. If ingress and egress
> LSRs are different from Core LSRs? If it is possible
> that in some cases Core LSR is used as ingress LSR ??
>
> Thanks,
> Gosh
>
>
>
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