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Cell Relay Retreat>MPLS-OPS Archive>month:2001-Jun> msg00369



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Re :

  • From: "Hemant P. Kelkar" <hemant@cyberspace.org>
  • Date: Thu, 28 Jun 2001 06:48:21 -0400 (EDT)
  • cc: mpls-ops@mplsrc.com
  • Resent-Date: Thu, 28 Jun 2001 07:47:32 -0400
  • To: glarous@yahoo.com

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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