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Cell Relay Retreat>MPLS WG Archive>month:2001-Aug> msg00183



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Difference between LIB and FIB

  • From: Eric Osborne <eosborne@cisco.com>
  • Date: Sat, 18 Aug 2001 14:11:21 -0400
  • Cc: mpls@UU.NET
  • User-Agent: Mutt/1.3.13i
  • X-GPG-Fingerprint: 6412 0836 E440 B3EA 980C 4951 611E 1819 2E71 8562

On Sat, Aug 18, 2001 at 09:34:03PM +0530, punithan wrote:
> Hi,
> I have one doubt.What is the difference between LIB(Label Information
> Base) and FIB(Forwarding Information Base).I will be thankful if
> somebody helps me.
> with regds,
> MXJPunithan

LIB = the thing you look up labels with (a labeled packet comes in,
you go to the LIB)

FIB = the thing you look up IP routes in (an unlabeled packet comes
in, you go to the FIB)




eric