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LDP label filtering

  • From: Eli Hadad <eli_hadad@sheernetworks.com>
  • Date: Thu, 26 May 2005 22:27:00 +0200
  • Resent-Date: Thu, 26 May 2005 15:43:01 -0400
  • X-Scanned-By: MIMEDefang 2.45

Title: LDP label filtering

Hi all,

I just came accross a cisco LSR configuration in which label distribution is filtered by means of ACLs.
This is done in cisco IOS by the command:
mpls ldp advertise-labels

My question is:
What implementations need label filtering ?
I saw this configuration in MPLS VPN (2547) in which only labels for BGP router ids are distributed.
Why bother and filter some labels ?
Does it related to performance issues ?

Thanks,
Eli