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Re: Default route FEC for LDP.

  • From: "Yongjun Im" <yjim@lge.com>
  • Date: Thu, 29 Jan 2004 22:23:56 +0900
  • Resent-Date: Thu, 29 Jan 2004 09:01:38 -0500
  • To: "bageshri kundu" <bageshrikundu@yahoo.com>, <mpls-ops@mplsrc.com>

Definitely it should send a Notification with status "No Route". 
In general, a "default LSP" that is established for a default route could be
very useful in order to save the number of LSPs required in a router.
In comparison to the number of IGP routes, the number of LSPs supported
in a single system might be limited.
 
 
----- Original Message -----
Sent: Thursday, January 29, 2004 10:07 PM
Subject: Re: [MPLS-OPS]: Default route FEC for LDP.

Thanks for the reply. What if the router does not have the default route? In that case, does it send a Notification with status "No Route" like with any other route for which it does not have an entry in its routing table.
 
Thanks again,
Bageshri

Yongjun Im <yjim@lge.com> wrote:
If the router, which received a label request with FEC for a default route, has the default route,
then it is supposed to send a label mapping for it. Any valid label will be allocated,
because in terms of label allocation, a default route makes no difference 
in comparison to non-default routes.
----- Original Message -----
Sent: Thursday, January 29, 2004 5:36 AM
Subject: [MPLS-OPS]: Default route FEC for LDP.

Hi,
 
What is a router supposed to do on receiving a Label request with the FEC tlv for a default route(0.0.0.0/0)? Is it supposed to send a Notification back with status "No route" or send a Label mapping for the same? If the latter is true, what is the label?
 
Thanks,
Bageshri

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