Re: [Lsr] I-D Action: draft-ietf-isis-mpls-elc-07.txt

Is the EL signaling for ecmp supported with IP LFA and remote LFA LDP label stacking interoperability.

Gyan Mishra 
Verizon Communications 
Phone 301 502-1347

Sent from my iPhone

> On May 14, 2019, at 3:34 AM, internet-drafts@ietf.org wrote:
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Link State Routing WG of the IETF.
> 
>        Title           : Signaling Entropy Label Capability and Entropy Readable Label Depth Using IS-IS
>        Authors         : Xiaohu Xu
>                          Sriganesh Kini
>                          Peter Psenak
>                          Clarence Filsfils
>                          Stephane Litkowski
>    Filename        : draft-ietf-isis-mpls-elc-07.txt
>    Pages           : 6
>    Date            : 2019-05-14
> 
> Abstract:
>   Multiprotocol Label Switching (MPLS) has defined a mechanism to load-
>   balance traffic flows using Entropy Labels (EL).  An ingress Label
>   Switching Router (LSR) cannot insert ELs for packets going into a
>   given Label Switched Path (LSP) unless an egress LSR has indicated
>   via signaling that it has the capability of processing ELs, referred
>   to as Entropy Label Capability (ELC), on that tunnel.  In addition,
>   it would be useful for ingress LSRs to know each LSR's capability of
>   reading the maximum label stack depth and performing EL-based load-
>   balancing, referred to as Entropy Readable Label Depth (ERLD).  This
>   document defines a mechanism to signal these two capabilities using
>   IS-IS.  These mechanisms are particularly useful, where label
>   advertisements are done via protocols like IS-IS.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-isis-mpls-elc/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-isis-mpls-elc-07
> https://datatracker.ietf.org/doc/html/draft-ietf-isis-mpls-elc-07
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-isis-mpls-elc-07
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
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