The MPLS WG Archive

[Eric Osborne <eosborne@cisco.com>]

On Thu, Jun 27, 2002 at 05:03:25PM +0000, George Sheng wrote:
> ] On Thu, Jun 27, 2002 at 07:50:39AM -0700, Richard Stephens wrote:
> ] > Is there any automated mechanism in existing MPLS
> ] > drafts that enable the automated generation of two
> ] > lsp's given two equal cost paths?  What i'm looking
> ] > for is the ability to use lsp load balancing without
> ] > having to static an lsp for all possible paths.
> ]
> ] LDP will do this automatically, as it follows the IGP; there are no
> ] provisions in TE to do this, but it could certainly be done by an
> ] operator.
> 
> 
> for ldp, yes if it's at the first hop of the lsp tunnel;
> but i think he is asking for ECMP even in the middle of
> the ldp tunnels. thus ldp needs to assign multi labels
> to its upstream for a single prefix which has ECMP.

not true with LDP in a frame-mode environment; ECMP is inherent in the
architecture.  with LDP cell-mode or with TE, yes, you're correct.


eric